diff --git a/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/AlertPolicyServiceClient.java b/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/AlertPolicyServiceClient.java index 7bf5d904123f..f2bca1bae7f6 100644 --- a/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/AlertPolicyServiceClient.java +++ b/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/AlertPolicyServiceClient.java @@ -556,6 +556,10 @@ public final UnaryCallable getAlertPolicyCal /** * Creates a new alerting policy. * + *

Design your application to single-thread API calls that modify the state of alerting + * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and + * UpdateAlertPolicy. + * *

Sample code: * * 

{@code
@@ -598,6 +602,10 @@ public final AlertPolicy createAlertPolicy(ResourceName name, AlertPolicy alertP
   /**
    * Creates a new alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -640,6 +648,10 @@ public final AlertPolicy createAlertPolicy(OrganizationName name, AlertPolicy al
   /**
    * Creates a new alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -682,6 +694,10 @@ public final AlertPolicy createAlertPolicy(ProjectName name, AlertPolicy alertPo
   /**
    * Creates a new alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -721,6 +737,10 @@ public final AlertPolicy createAlertPolicy(String name, AlertPolicy alertPolicy)
   /**
    * Creates a new alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -750,6 +770,10 @@ public final AlertPolicy createAlertPolicy(CreateAlertPolicyRequest request) {
   /**
    * Creates a new alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -779,6 +803,10 @@ public final UnaryCallable createAlertPol
   /**
    * Deletes an alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -811,6 +839,10 @@ public final void deleteAlertPolicy(AlertPolicyName name) {
   /**
    * Deletes an alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -840,6 +872,10 @@ public final void deleteAlertPolicy(String name) {
   /**
    * Deletes an alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -870,6 +906,10 @@ public final void deleteAlertPolicy(DeleteAlertPolicyRequest request) {
   /**
    * Deletes an alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -902,6 +942,10 @@ public final UnaryCallable deleteAlertPolicyCal
    * only certain fields in the current alerting policy by specifying the fields to be updated via
    * `updateMask`. Returns the updated alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -952,6 +996,10 @@ public final AlertPolicy updateAlertPolicy(FieldMask updateMask, AlertPolicy ale
    * only certain fields in the current alerting policy by specifying the fields to be updated via
    * `updateMask`. Returns the updated alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -983,6 +1031,10 @@ public final AlertPolicy updateAlertPolicy(UpdateAlertPolicyRequest request) {
    * only certain fields in the current alerting policy by specifying the fields to be updated via
    * `updateMask`. Returns the updated alerting policy.
    *
+   * 
Design your application to single-thread API calls that modify the state of alerting
+   * policies in a single project. This includes calls to CreateAlertPolicy, DeleteAlertPolicy and
+   * UpdateAlertPolicy.
+   *
    * 
Sample code:
    *
    * 
{@code
diff --git a/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/NotificationChannelServiceClient.java b/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/NotificationChannelServiceClient.java
index 4336d8e78a2a..2ef572863f24 100644
--- a/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/NotificationChannelServiceClient.java
+++ b/java-monitoring/google-cloud-monitoring/src/main/java/com/google/cloud/monitoring/v3/NotificationChannelServiceClient.java
@@ -620,7 +620,8 @@ public final NotificationChannelDescriptor getNotificationChannelDescriptor(
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -659,7 +660,8 @@ public final ListNotificationChannelsPagedResponse listNotificationChannels(Reso
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -699,7 +701,8 @@ public final ListNotificationChannelsPagedResponse listNotificationChannels(
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -738,7 +741,8 @@ public final ListNotificationChannelsPagedResponse listNotificationChannels(Proj
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -775,7 +779,8 @@ public final ListNotificationChannelsPagedResponse listNotificationChannels(Stri
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -812,7 +817,8 @@ public final ListNotificationChannelsPagedResponse listNotificationChannels(
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -850,7 +856,8 @@ public final ListNotificationChannelsPagedResponse listNotificationChannels(
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Lists the notification channels that have been created for the project.
+   * Lists the notification channels that have been created for the project. To list the types of
+   * notification channels that are supported, use the `ListNotificationChannelDescriptors` method.
    *
    * 
Sample code:
    *
@@ -1039,6 +1046,10 @@ public final NotificationChannel getNotificationChannel(GetNotificationChannelRe
    * Creates a new notification channel, representing a single notification endpoint such as an
    * email address, SMS number, or PagerDuty service.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1081,6 +1092,10 @@ public final NotificationChannel createNotificationChannel(
    * Creates a new notification channel, representing a single notification endpoint such as an
    * email address, SMS number, or PagerDuty service.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1123,6 +1138,10 @@ public final NotificationChannel createNotificationChannel(
    * Creates a new notification channel, representing a single notification endpoint such as an
    * email address, SMS number, or PagerDuty service.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1165,6 +1184,10 @@ public final NotificationChannel createNotificationChannel(
    * Creates a new notification channel, representing a single notification endpoint such as an
    * email address, SMS number, or PagerDuty service.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1207,6 +1230,10 @@ public final NotificationChannel createNotificationChannel(
    * Creates a new notification channel, representing a single notification endpoint such as an
    * email address, SMS number, or PagerDuty service.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1240,6 +1267,10 @@ public final NotificationChannel createNotificationChannel(
    * Creates a new notification channel, representing a single notification endpoint such as an
    * email address, SMS number, or PagerDuty service.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1271,6 +1302,10 @@ public final NotificationChannel createNotificationChannel(
   /**
    * Updates a notification channel. Fields not specified in the field mask remain unchanged.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1309,6 +1344,10 @@ public final NotificationChannel updateNotificationChannel(
   /**
    * Updates a notification channel. Fields not specified in the field mask remain unchanged.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1341,6 +1380,10 @@ public final NotificationChannel updateNotificationChannel(
   /**
    * Updates a notification channel. Fields not specified in the field mask remain unchanged.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1372,6 +1415,10 @@ public final NotificationChannel updateNotificationChannel(
   /**
    * Deletes a notification channel.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1411,6 +1458,10 @@ public final void deleteNotificationChannel(NotificationChannelName name, boolea
   /**
    * Deletes a notification channel.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1448,6 +1499,10 @@ public final void deleteNotificationChannel(String name, boolean force) {
   /**
    * Deletes a notification channel.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
@@ -1481,6 +1536,10 @@ public final void deleteNotificationChannel(DeleteNotificationChannelRequest req
   /**
    * Deletes a notification channel.
    *
+   * 
Design your application to single-thread API calls that modify the state of notification
+   * channels in a single project. This includes calls to CreateNotificationChannel,
+   * DeleteNotificationChannel and UpdateNotificationChannel.
+   *
    * 
Sample code:
    *
    * 
{@code
diff --git a/java-monitoring/google-cloud-monitoring/src/main/resources/META-INF/native-image/com.google.cloud.monitoring.v3/reflect-config.json b/java-monitoring/google-cloud-monitoring/src/main/resources/META-INF/native-image/com.google.cloud.monitoring.v3/reflect-config.json
index df6d4920e888..5021e69939b8 100644
--- a/java-monitoring/google-cloud-monitoring/src/main/resources/META-INF/native-image/com.google.cloud.monitoring.v3/reflect-config.json
+++ b/java-monitoring/google-cloud-monitoring/src/main/resources/META-INF/native-image/com.google.cloud.monitoring.v3/reflect-config.json
@@ -719,6 +719,24 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$AlertStrategy$NotificationChannelStrategy",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$AlertStrategy$NotificationChannelStrategy$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.monitoring.v3.AlertPolicy$AlertStrategy$NotificationRateLimit",
     "queryAllDeclaredConstructors": true,
@@ -827,6 +845,24 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$Condition$MetricThreshold$ForecastOptions",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$Condition$MetricThreshold$ForecastOptions$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.monitoring.v3.AlertPolicy$Condition$MonitoringQueryLanguageCondition",
     "queryAllDeclaredConstructors": true,
@@ -845,6 +881,24 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$Condition$PrometheusQueryLanguageCondition",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$Condition$PrometheusQueryLanguageCondition$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.monitoring.v3.AlertPolicy$Condition$Trigger",
     "queryAllDeclaredConstructors": true,
diff --git a/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyServiceGrpc.java b/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyServiceGrpc.java
index 8fb614f43aa6..1d7c653f8be5 100644
--- a/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyServiceGrpc.java
+++ b/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyServiceGrpc.java
@@ -357,6 +357,9 @@ default void getAlertPolicy(
      *
      * 
      * Creates a new alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     default void createAlertPolicy(
@@ -371,6 +374,9 @@ default void createAlertPolicy(
      *
      * 
      * Deletes an alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     default void deleteAlertPolicy(
@@ -388,6 +394,9 @@ default void deleteAlertPolicy(
      * a new one or replace only certain fields in the current alerting policy by
      * specifying the fields to be updated via `updateMask`. Returns the
      * updated alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     default void updateAlertPolicy(
@@ -487,6 +496,9 @@ public void getAlertPolicy(
      *
      * 
      * Creates a new alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public void createAlertPolicy(
@@ -503,6 +515,9 @@ public void createAlertPolicy(
      *
      * 
      * Deletes an alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public void deleteAlertPolicy(
@@ -522,6 +537,9 @@ public void deleteAlertPolicy(
      * a new one or replace only certain fields in the current alerting policy by
      * specifying the fields to be updated via `updateMask`. Returns the
      * updated alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public void updateAlertPolicy(
@@ -593,6 +611,9 @@ public com.google.monitoring.v3.AlertPolicy getAlertPolicy(
      *
      * 
      * Creates a new alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public com.google.monitoring.v3.AlertPolicy createAlertPolicy(
@@ -606,6 +627,9 @@ public com.google.monitoring.v3.AlertPolicy createAlertPolicy(
      *
      * 
      * Deletes an alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public com.google.protobuf.Empty deleteAlertPolicy(
@@ -622,6 +646,9 @@ public com.google.protobuf.Empty deleteAlertPolicy(
      * a new one or replace only certain fields in the current alerting policy by
      * specifying the fields to be updated via `updateMask`. Returns the
      * updated alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public com.google.monitoring.v3.AlertPolicy updateAlertPolicy(
@@ -690,6 +717,9 @@ protected AlertPolicyServiceFutureStub build(
      *
      * 
      * Creates a new alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture
@@ -703,6 +733,9 @@ protected AlertPolicyServiceFutureStub build(
      *
      * 
      * Deletes an alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture
@@ -719,6 +752,9 @@ protected AlertPolicyServiceFutureStub build(
      * a new one or replace only certain fields in the current alerting policy by
      * specifying the fields to be updated via `updateMask`. Returns the
      * updated alerting policy.
+     * Design your application to single-thread API calls that modify the state of
+     * alerting policies in a single project. This includes calls to
+     * CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture
diff --git a/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelServiceGrpc.java b/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelServiceGrpc.java
index 23ca2e0edfd7..cc7c7ec96e9f 100644
--- a/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelServiceGrpc.java
+++ b/java-monitoring/grpc-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelServiceGrpc.java
@@ -651,6 +651,8 @@ default void getNotificationChannelDescriptor(
      *
      * 
      * Lists the notification channels that have been created for the project.
+     * To list the types of notification channels that are supported, use
+     * the `ListNotificationChannelDescriptors` method.
      * 

      */
     default void listNotificationChannels(
@@ -686,6 +688,10 @@ default void getNotificationChannel(
      * 
      * Creates a new notification channel, representing a single notification
      * endpoint such as an email address, SMS number, or PagerDuty service.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     default void createNotificationChannel(
@@ -702,6 +708,10 @@ default void createNotificationChannel(
      * 
      * Updates a notification channel. Fields not specified in the field mask
      * remain unchanged.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     default void updateNotificationChannel(
@@ -717,6 +727,10 @@ default void updateNotificationChannel(
      *
      * 
      * Deletes a notification channel.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     default void deleteNotificationChannel(
@@ -874,6 +888,8 @@ public void getNotificationChannelDescriptor(
      *
      * 
      * Lists the notification channels that have been created for the project.
+     * To list the types of notification channels that are supported, use
+     * the `ListNotificationChannelDescriptors` method.
      * 

      */
     public void listNotificationChannels(
@@ -913,6 +929,10 @@ public void getNotificationChannel(
      * 
      * Creates a new notification channel, representing a single notification
      * endpoint such as an email address, SMS number, or PagerDuty service.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public void createNotificationChannel(
@@ -931,6 +951,10 @@ public void createNotificationChannel(
      * 
      * Updates a notification channel. Fields not specified in the field mask
      * remain unchanged.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public void updateNotificationChannel(
@@ -948,6 +972,10 @@ public void updateNotificationChannel(
      *
      * 
      * Deletes a notification channel.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public void deleteNotificationChannel(
@@ -1089,6 +1117,8 @@ public com.google.monitoring.v3.NotificationChannelDescriptor getNotificationCha
      *
      * 
      * Lists the notification channels that have been created for the project.
+     * To list the types of notification channels that are supported, use
+     * the `ListNotificationChannelDescriptors` method.
      * 

      */
     public com.google.monitoring.v3.ListNotificationChannelsResponse listNotificationChannels(
@@ -1120,6 +1150,10 @@ public com.google.monitoring.v3.NotificationChannel getNotificationChannel(
      * 
      * Creates a new notification channel, representing a single notification
      * endpoint such as an email address, SMS number, or PagerDuty service.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public com.google.monitoring.v3.NotificationChannel createNotificationChannel(
@@ -1134,6 +1168,10 @@ public com.google.monitoring.v3.NotificationChannel createNotificationChannel(
      * 
      * Updates a notification channel. Fields not specified in the field mask
      * remain unchanged.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public com.google.monitoring.v3.NotificationChannel updateNotificationChannel(
@@ -1147,6 +1185,10 @@ public com.google.monitoring.v3.NotificationChannel updateNotificationChannel(
      *
      * 
      * Deletes a notification channel.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public com.google.protobuf.Empty deleteNotificationChannel(
@@ -1285,6 +1327,8 @@ protected NotificationChannelServiceFutureStub build(
      *
      * 
      * Lists the notification channels that have been created for the project.
+     * To list the types of notification channels that are supported, use
+     * the `ListNotificationChannelDescriptors` method.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture<
@@ -1318,6 +1362,10 @@ protected NotificationChannelServiceFutureStub build(
      * 
      * Creates a new notification channel, representing a single notification
      * endpoint such as an email address, SMS number, or PagerDuty service.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture<
@@ -1334,6 +1382,10 @@ protected NotificationChannelServiceFutureStub build(
      * 
      * Updates a notification channel. Fields not specified in the field mask
      * remain unchanged.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture<
@@ -1349,6 +1401,10 @@ protected NotificationChannelServiceFutureStub build(
      *
      * 
      * Deletes a notification channel.
+     * Design your application to single-thread API calls that modify the state of
+     * notification channels in a single project. This includes calls to
+     * CreateNotificationChannel, DeleteNotificationChannel and
+     * UpdateNotificationChannel.
      * 

      */
     public com.google.common.util.concurrent.ListenableFuture
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicy.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicy.java
index 9c8bff2d6e81..75474ed83751 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicy.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicy.java
@@ -283,7 +283,7 @@ public interface DocumentationOrBuilder
      *
      *
      * 
-     * The text of the documentation, interpreted according to `mime_type`.
+     * The body of the documentation, interpreted according to `mime_type`.
      * The content may not exceed 8,192 Unicode characters and may not exceed
      * more than 10,240 bytes when encoded in UTF-8 format, whichever is
      * smaller. This text can be [templatized by using
@@ -299,7 +299,7 @@ public interface DocumentationOrBuilder
      *
      *
      * 
-     * The text of the documentation, interpreted according to `mime_type`.
+     * The body of the documentation, interpreted according to `mime_type`.
      * The content may not exceed 8,192 Unicode characters and may not exceed
      * more than 10,240 bytes when encoded in UTF-8 format, whichever is
      * smaller. This text can be [templatized by using
@@ -340,6 +340,55 @@ public interface DocumentationOrBuilder
      * @return The bytes for mimeType.
      */
     com.google.protobuf.ByteString getMimeTypeBytes();
+
+    /**
+     *
+     *
+     * 
+     * Optional. The subject line of the notification. The subject line may not
+     * exceed 10,240 bytes. In notifications generated by this policy, the
+     * contents of the subject line after variable expansion will be truncated
+     * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+     * 255-byte limit is recommended by [this
+     * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+     * It is both the limit imposed by some third-party ticketing products and
+     * it is common to define textual fields in databases as VARCHAR(255).
+     *
+     * The contents of the subject line can be [templatized by using
+     * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+     * If this field is missing or empty, a default subject line will be
+     * generated.
+     * 

+     *
+     * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+     *
+     * @return The subject.
+     */
+    java.lang.String getSubject();
+    /**
+     *
+     *
+     * 
+     * Optional. The subject line of the notification. The subject line may not
+     * exceed 10,240 bytes. In notifications generated by this policy, the
+     * contents of the subject line after variable expansion will be truncated
+     * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+     * 255-byte limit is recommended by [this
+     * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+     * It is both the limit imposed by some third-party ticketing products and
+     * it is common to define textual fields in databases as VARCHAR(255).
+     *
+     * The contents of the subject line can be [templatized by using
+     * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+     * If this field is missing or empty, a default subject line will be
+     * generated.
+     * 

+     *
+     * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+     *
+     * @return The bytes for subject.
+     */
+    com.google.protobuf.ByteString getSubjectBytes();
   }
   /**
    *
@@ -364,6 +413,7 @@ private Documentation(com.google.protobuf.GeneratedMessageV3.Builder builder)
     private Documentation() {
       content_ = "";
       mimeType_ = "";
+      subject_ = "";
     }
 
     @java.lang.Override
@@ -395,7 +445,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
      *
      *
      * 
-     * The text of the documentation, interpreted according to `mime_type`.
+     * The body of the documentation, interpreted according to `mime_type`.
      * The content may not exceed 8,192 Unicode characters and may not exceed
      * more than 10,240 bytes when encoded in UTF-8 format, whichever is
      * smaller. This text can be [templatized by using
@@ -422,7 +472,7 @@ public java.lang.String getContent() {
      *
      *
      * 
-     * The text of the documentation, interpreted according to `mime_type`.
+     * The body of the documentation, interpreted according to `mime_type`.
      * The content may not exceed 8,192 Unicode characters and may not exceed
      * more than 10,240 bytes when encoded in UTF-8 format, whichever is
      * smaller. This text can be [templatized by using
@@ -501,6 +551,81 @@ public com.google.protobuf.ByteString getMimeTypeBytes() {
       }
     }
 
+    public static final int SUBJECT_FIELD_NUMBER = 3;
+
+    @SuppressWarnings("serial")
+    private volatile java.lang.Object subject_ = "";
+    /**
+     *
+     *
+     * 
+     * Optional. The subject line of the notification. The subject line may not
+     * exceed 10,240 bytes. In notifications generated by this policy, the
+     * contents of the subject line after variable expansion will be truncated
+     * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+     * 255-byte limit is recommended by [this
+     * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+     * It is both the limit imposed by some third-party ticketing products and
+     * it is common to define textual fields in databases as VARCHAR(255).
+     *
+     * The contents of the subject line can be [templatized by using
+     * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+     * If this field is missing or empty, a default subject line will be
+     * generated.
+     * 

+     *
+     * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+     *
+     * @return The subject.
+     */
+    @java.lang.Override
+    public java.lang.String getSubject() {
+      java.lang.Object ref = subject_;
+      if (ref instanceof java.lang.String) {
+        return (java.lang.String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        subject_ = s;
+        return s;
+      }
+    }
+    /**
+     *
+     *
+     * 
+     * Optional. The subject line of the notification. The subject line may not
+     * exceed 10,240 bytes. In notifications generated by this policy, the
+     * contents of the subject line after variable expansion will be truncated
+     * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+     * 255-byte limit is recommended by [this
+     * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+     * It is both the limit imposed by some third-party ticketing products and
+     * it is common to define textual fields in databases as VARCHAR(255).
+     *
+     * The contents of the subject line can be [templatized by using
+     * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+     * If this field is missing or empty, a default subject line will be
+     * generated.
+     * 

+     *
+     * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+     *
+     * @return The bytes for subject.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString getSubjectBytes() {
+      java.lang.Object ref = subject_;
+      if (ref instanceof java.lang.String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        subject_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
     private byte memoizedIsInitialized = -1;
 
     @java.lang.Override
@@ -521,6 +646,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(mimeType_)) {
         com.google.protobuf.GeneratedMessageV3.writeString(output, 2, mimeType_);
       }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(subject_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 3, subject_);
+      }
       getUnknownFields().writeTo(output);
     }
 
@@ -536,6 +664,9 @@ public int getSerializedSize() {
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(mimeType_)) {
         size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, mimeType_);
       }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(subject_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, subject_);
+      }
       size += getUnknownFields().getSerializedSize();
       memoizedSize = size;
       return size;
@@ -554,6 +685,7 @@ public boolean equals(final java.lang.Object obj) {
 
       if (!getContent().equals(other.getContent())) return false;
       if (!getMimeType().equals(other.getMimeType())) return false;
+      if (!getSubject().equals(other.getSubject())) return false;
       if (!getUnknownFields().equals(other.getUnknownFields())) return false;
       return true;
     }
@@ -569,6 +701,8 @@ public int hashCode() {
       hash = (53 * hash) + getContent().hashCode();
       hash = (37 * hash) + MIME_TYPE_FIELD_NUMBER;
       hash = (53 * hash) + getMimeType().hashCode();
+      hash = (37 * hash) + SUBJECT_FIELD_NUMBER;
+      hash = (53 * hash) + getSubject().hashCode();
       hash = (29 * hash) + getUnknownFields().hashCode();
       memoizedHashCode = hash;
       return hash;
@@ -713,6 +847,7 @@ public Builder clear() {
         bitField0_ = 0;
         content_ = "";
         mimeType_ = "";
+        subject_ = "";
         return this;
       }
 
@@ -755,6 +890,9 @@ private void buildPartial0(com.google.monitoring.v3.AlertPolicy.Documentation re
         if (((from_bitField0_ & 0x00000002) != 0)) {
           result.mimeType_ = mimeType_;
         }
+        if (((from_bitField0_ & 0x00000004) != 0)) {
+          result.subject_ = subject_;
+        }
       }
 
       @java.lang.Override
@@ -815,6 +953,11 @@ public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.Documentation othe
           bitField0_ |= 0x00000002;
           onChanged();
         }
+        if (!other.getSubject().isEmpty()) {
+          subject_ = other.subject_;
+          bitField0_ |= 0x00000004;
+          onChanged();
+        }
         this.mergeUnknownFields(other.getUnknownFields());
         onChanged();
         return this;
@@ -853,6 +996,12 @@ public Builder mergeFrom(
                   bitField0_ |= 0x00000002;
                   break;
                 } // case 18
+              case 26:
+                {
+                  subject_ = input.readStringRequireUtf8();
+                  bitField0_ |= 0x00000004;
+                  break;
+                } // case 26
               default:
                 {
                   if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -877,7 +1026,7 @@ public Builder mergeFrom(
        *
        *
        * 
-       * The text of the documentation, interpreted according to `mime_type`.
+       * The body of the documentation, interpreted according to `mime_type`.
        * The content may not exceed 8,192 Unicode characters and may not exceed
        * more than 10,240 bytes when encoded in UTF-8 format, whichever is
        * smaller. This text can be [templatized by using
@@ -903,7 +1052,7 @@ public java.lang.String getContent() {
        *
        *
        * 
-       * The text of the documentation, interpreted according to `mime_type`.
+       * The body of the documentation, interpreted according to `mime_type`.
        * The content may not exceed 8,192 Unicode characters and may not exceed
        * more than 10,240 bytes when encoded in UTF-8 format, whichever is
        * smaller. This text can be [templatized by using
@@ -929,7 +1078,7 @@ public com.google.protobuf.ByteString getContentBytes() {
        *
        *
        * 
-       * The text of the documentation, interpreted according to `mime_type`.
+       * The body of the documentation, interpreted according to `mime_type`.
        * The content may not exceed 8,192 Unicode characters and may not exceed
        * more than 10,240 bytes when encoded in UTF-8 format, whichever is
        * smaller. This text can be [templatized by using
@@ -954,7 +1103,7 @@ public Builder setContent(java.lang.String value) {
        *
        *
        * 
-       * The text of the documentation, interpreted according to `mime_type`.
+       * The body of the documentation, interpreted according to `mime_type`.
        * The content may not exceed 8,192 Unicode characters and may not exceed
        * more than 10,240 bytes when encoded in UTF-8 format, whichever is
        * smaller. This text can be [templatized by using
@@ -975,7 +1124,7 @@ public Builder clearContent() {
        *
        *
        * 
-       * The text of the documentation, interpreted according to `mime_type`.
+       * The body of the documentation, interpreted according to `mime_type`.
        * The content may not exceed 8,192 Unicode characters and may not exceed
        * more than 10,240 bytes when encoded in UTF-8 format, whichever is
        * smaller. This text can be [templatized by using
@@ -1114,6 +1263,172 @@ public Builder setMimeTypeBytes(com.google.protobuf.ByteString value) {
         return this;
       }
 
+      private java.lang.Object subject_ = "";
+      /**
+       *
+       *
+       * 
+       * Optional. The subject line of the notification. The subject line may not
+       * exceed 10,240 bytes. In notifications generated by this policy, the
+       * contents of the subject line after variable expansion will be truncated
+       * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+       * 255-byte limit is recommended by [this
+       * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+       * It is both the limit imposed by some third-party ticketing products and
+       * it is common to define textual fields in databases as VARCHAR(255).
+       *
+       * The contents of the subject line can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * If this field is missing or empty, a default subject line will be
+       * generated.
+       * 

+       *
+       * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @return The subject.
+       */
+      public java.lang.String getSubject() {
+        java.lang.Object ref = subject_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          subject_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. The subject line of the notification. The subject line may not
+       * exceed 10,240 bytes. In notifications generated by this policy, the
+       * contents of the subject line after variable expansion will be truncated
+       * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+       * 255-byte limit is recommended by [this
+       * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+       * It is both the limit imposed by some third-party ticketing products and
+       * it is common to define textual fields in databases as VARCHAR(255).
+       *
+       * The contents of the subject line can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * If this field is missing or empty, a default subject line will be
+       * generated.
+       * 

+       *
+       * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @return The bytes for subject.
+       */
+      public com.google.protobuf.ByteString getSubjectBytes() {
+        java.lang.Object ref = subject_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          subject_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. The subject line of the notification. The subject line may not
+       * exceed 10,240 bytes. In notifications generated by this policy, the
+       * contents of the subject line after variable expansion will be truncated
+       * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+       * 255-byte limit is recommended by [this
+       * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+       * It is both the limit imposed by some third-party ticketing products and
+       * it is common to define textual fields in databases as VARCHAR(255).
+       *
+       * The contents of the subject line can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * If this field is missing or empty, a default subject line will be
+       * generated.
+       * 

+       *
+       * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @param value The subject to set.
+       * @return This builder for chaining.
+       */
+      public Builder setSubject(java.lang.String value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        subject_ = value;
+        bitField0_ |= 0x00000004;
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. The subject line of the notification. The subject line may not
+       * exceed 10,240 bytes. In notifications generated by this policy, the
+       * contents of the subject line after variable expansion will be truncated
+       * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+       * 255-byte limit is recommended by [this
+       * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+       * It is both the limit imposed by some third-party ticketing products and
+       * it is common to define textual fields in databases as VARCHAR(255).
+       *
+       * The contents of the subject line can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * If this field is missing or empty, a default subject line will be
+       * generated.
+       * 

+       *
+       * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @return This builder for chaining.
+       */
+      public Builder clearSubject() {
+        subject_ = getDefaultInstance().getSubject();
+        bitField0_ = (bitField0_ & ~0x00000004);
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. The subject line of the notification. The subject line may not
+       * exceed 10,240 bytes. In notifications generated by this policy, the
+       * contents of the subject line after variable expansion will be truncated
+       * to 255 bytes or shorter at the latest UTF-8 character boundary. The
+       * 255-byte limit is recommended by [this
+       * thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+       * It is both the limit imposed by some third-party ticketing products and
+       * it is common to define textual fields in databases as VARCHAR(255).
+       *
+       * The contents of the subject line can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * If this field is missing or empty, a default subject line will be
+       * generated.
+       * 

+       *
+       * string subject = 3 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @param value The bytes for subject to set.
+       * @return This builder for chaining.
+       */
+      public Builder setSubjectBytes(com.google.protobuf.ByteString value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        checkByteStringIsUtf8(value);
+        subject_ = value;
+        bitField0_ |= 0x00000004;
+        onChanged();
+        return this;
+      }
+
       @java.lang.Override
       public final Builder setUnknownFields(
           final com.google.protobuf.UnknownFieldSet unknownFields) {
@@ -1448,6 +1763,49 @@ public interface ConditionOrBuilder
     com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageConditionOrBuilder
         getConditionMonitoringQueryLanguageOrBuilder();
 
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Prometheus query language to define alerts.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
+     * 
+     *
+     * @return Whether the conditionPrometheusQueryLanguage field is set.
+     */
+    boolean hasConditionPrometheusQueryLanguage();
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Prometheus query language to define alerts.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
+     * 
+     *
+     * @return The conditionPrometheusQueryLanguage.
+     */
+    com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+        getConditionPrometheusQueryLanguage();
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Prometheus query language to define alerts.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
+     * 
+     */
+    com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageConditionOrBuilder
+        getConditionPrometheusQueryLanguageOrBuilder();
+
     com.google.monitoring.v3.AlertPolicy.Condition.ConditionCase getConditionCase();
   }
   /**
@@ -2553,7 +2911,8 @@ public interface MetricThresholdOrBuilder
        *
        *
        * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
        * identifies which time series should be compared with the threshold.
        *
        * The filter is similar to the one that is specified in the
@@ -2574,7 +2933,8 @@ public interface MetricThresholdOrBuilder
        *
        *
        * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
        * identifies which time series should be compared with the threshold.
        *
        * The filter is similar to the one that is specified in the
@@ -2832,6 +3192,61 @@ public interface MetricThresholdOrBuilder
        */
       com.google.monitoring.v3.AggregationOrBuilder getDenominatorAggregationsOrBuilder(int index);
 
+      /**
+       *
+       *
+       * 
+       * When this field is present, the `MetricThreshold` condition forecasts
+       * whether the time series is predicted to violate the threshold within
+       * the `forecast_horizon`. When this field is not set, the
+       * `MetricThreshold` tests the current value of the timeseries against the
+       * threshold.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+       * 
+       *
+       * @return Whether the forecastOptions field is set.
+       */
+      boolean hasForecastOptions();
+      /**
+       *
+       *
+       * 
+       * When this field is present, the `MetricThreshold` condition forecasts
+       * whether the time series is predicted to violate the threshold within
+       * the `forecast_horizon`. When this field is not set, the
+       * `MetricThreshold` tests the current value of the timeseries against the
+       * threshold.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+       * 
+       *
+       * @return The forecastOptions.
+       */
+      com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+          getForecastOptions();
+      /**
+       *
+       *
+       * 
+       * When this field is present, the `MetricThreshold` condition forecasts
+       * whether the time series is predicted to violate the threshold within
+       * the `forecast_horizon`. When this field is not set, the
+       * `MetricThreshold` tests the current value of the timeseries against the
+       * threshold.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+       * 
+       */
+      com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptionsOrBuilder
+          getForecastOptionsOrBuilder();
+
       /**
        *
        *
@@ -3074,3151 +3489,3075 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
                 com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder.class);
       }
 
-      public static final int FILTER_FIELD_NUMBER = 2;
+      public interface ForecastOptionsOrBuilder
+          extends
+          // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)
+          com.google.protobuf.MessageOrBuilder {
 
-      @SuppressWarnings("serial")
-      private volatile java.lang.Object filter_ = "";
+        /**
+         *
+         *
+         * 
+         * Required. The length of time into the future to forecast whether a
+         * time series will violate the threshold. If the predicted value is
+         * found to violate the threshold, and the violation is observed in all
+         * forecasts made for the configured `duration`, then the time series is
+         * considered to be failing.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+         * 
+         *
+         * @return Whether the forecastHorizon field is set.
+         */
+        boolean hasForecastHorizon();
+        /**
+         *
+         *
+         * 
+         * Required. The length of time into the future to forecast whether a
+         * time series will violate the threshold. If the predicted value is
+         * found to violate the threshold, and the violation is observed in all
+         * forecasts made for the configured `duration`, then the time series is
+         * considered to be failing.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+         * 
+         *
+         * @return The forecastHorizon.
+         */
+        com.google.protobuf.Duration getForecastHorizon();
+        /**
+         *
+         *
+         * 
+         * Required. The length of time into the future to forecast whether a
+         * time series will violate the threshold. If the predicted value is
+         * found to violate the threshold, and the violation is observed in all
+         * forecasts made for the configured `duration`, then the time series is
+         * considered to be failing.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+         * 
+         */
+        com.google.protobuf.DurationOrBuilder getForecastHorizonOrBuilder();
+      }
       /**
        *
        *
        * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies which time series should be compared with the threshold.
-       *
-       * The filter is similar to the one that is specified in the
-       * [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-       * (that call is useful to verify the time series that will be retrieved /
-       * processed). The filter must specify the metric type and the resource
-       * type. Optionally, it can specify resource labels and metric labels.
-       * This field must not exceed 2048 Unicode characters in length.
+       * Options used when forecasting the time series and testing
+       * the predicted value against the threshold.
        * 

        *
-       * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-       *
-       * @return The filter.
+       * Protobuf type {@code
+       * google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions}
        */
-      @java.lang.Override
-      public java.lang.String getFilter() {
-        java.lang.Object ref = filter_;
-        if (ref instanceof java.lang.String) {
-          return (java.lang.String) ref;
-        } else {
-          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          filter_ = s;
-          return s;
-        }
-      }
-      /**
-       *
-       *
-       * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies which time series should be compared with the threshold.
-       *
-       * The filter is similar to the one that is specified in the
-       * [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-       * (that call is useful to verify the time series that will be retrieved /
-       * processed). The filter must specify the metric type and the resource
-       * type. Optionally, it can specify resource labels and metric labels.
-       * This field must not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-       *
-       * @return The bytes for filter.
-       */
-      @java.lang.Override
-      public com.google.protobuf.ByteString getFilterBytes() {
-        java.lang.Object ref = filter_;
-        if (ref instanceof java.lang.String) {
-          com.google.protobuf.ByteString b =
-              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-          filter_ = b;
-          return b;
-        } else {
-          return (com.google.protobuf.ByteString) ref;
+      public static final class ForecastOptions extends com.google.protobuf.GeneratedMessageV3
+          implements
+          // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)
+          ForecastOptionsOrBuilder {
+        private static final long serialVersionUID = 0L;
+        // Use ForecastOptions.newBuilder() to construct.
+        private ForecastOptions(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+          super(builder);
         }
-      }
-
-      public static final int AGGREGATIONS_FIELD_NUMBER = 8;
-
-      @SuppressWarnings("serial")
-      private java.util.List aggregations_;
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-       */
-      @java.lang.Override
-      public java.util.List getAggregationsList() {
-        return aggregations_;
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-       */
-      @java.lang.Override
-      public java.util.List
-          getAggregationsOrBuilderList() {
-        return aggregations_;
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-       */
-      @java.lang.Override
-      public int getAggregationsCount() {
-        return aggregations_.size();
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.Aggregation getAggregations(int index) {
-        return aggregations_.get(index);
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index) {
-        return aggregations_.get(index);
-      }
 
-      public static final int DENOMINATOR_FILTER_FIELD_NUMBER = 9;
+        private ForecastOptions() {}
 
-      @SuppressWarnings("serial")
-      private volatile java.lang.Object denominatorFilter_ = "";
-      /**
-       *
-       *
-       * 
-       * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies a time series that should be used as the denominator of a
-       * ratio that will be compared with the threshold. If a
-       * `denominator_filter` is specified, the time series specified by the
-       * `filter` field will be used as the numerator.
-       *
-       * The filter must specify the metric type and optionally may contain
-       * restrictions on resource type, resource labels, and metric labels.
-       * This field may not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string denominator_filter = 9;
-       *
-       * @return The denominatorFilter.
-       */
-      @java.lang.Override
-      public java.lang.String getDenominatorFilter() {
-        java.lang.Object ref = denominatorFilter_;
-        if (ref instanceof java.lang.String) {
-          return (java.lang.String) ref;
-        } else {
-          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          denominatorFilter_ = s;
-          return s;
+        @java.lang.Override
+        @SuppressWarnings({"unused"})
+        protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+          return new ForecastOptions();
         }
-      }
-      /**
-       *
-       *
-       * 
-       * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies a time series that should be used as the denominator of a
-       * ratio that will be compared with the threshold. If a
-       * `denominator_filter` is specified, the time series specified by the
-       * `filter` field will be used as the numerator.
-       *
-       * The filter must specify the metric type and optionally may contain
-       * restrictions on resource type, resource labels, and metric labels.
-       * This field may not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string denominator_filter = 9;
-       *
-       * @return The bytes for denominatorFilter.
-       */
-      @java.lang.Override
-      public com.google.protobuf.ByteString getDenominatorFilterBytes() {
-        java.lang.Object ref = denominatorFilter_;
-        if (ref instanceof java.lang.String) {
-          com.google.protobuf.ByteString b =
-              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-          denominatorFilter_ = b;
-          return b;
-        } else {
-          return (com.google.protobuf.ByteString) ref;
+
+        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_descriptor;
         }
-      }
 
-      public static final int DENOMINATOR_AGGREGATIONS_FIELD_NUMBER = 10;
+        @java.lang.Override
+        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                      .class,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                      .Builder.class);
+        }
 
-      @SuppressWarnings("serial")
-      private java.util.List denominatorAggregations_;
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series
-       * selected by `denominatorFilter` as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources).
-       *
-       * When computing ratios, the `aggregations` and
-       * `denominator_aggregations` fields must use the same alignment period
-       * and produce time series that have the same periodicity and labels.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-       */
-      @java.lang.Override
-      public java.util.List getDenominatorAggregationsList() {
-        return denominatorAggregations_;
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series
-       * selected by `denominatorFilter` as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources).
-       *
-       * When computing ratios, the `aggregations` and
-       * `denominator_aggregations` fields must use the same alignment period
-       * and produce time series that have the same periodicity and labels.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-       */
-      @java.lang.Override
-      public java.util.List
-          getDenominatorAggregationsOrBuilderList() {
-        return denominatorAggregations_;
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series
-       * selected by `denominatorFilter` as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources).
-       *
-       * When computing ratios, the `aggregations` and
-       * `denominator_aggregations` fields must use the same alignment period
-       * and produce time series that have the same periodicity and labels.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-       */
-      @java.lang.Override
-      public int getDenominatorAggregationsCount() {
-        return denominatorAggregations_.size();
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series
-       * selected by `denominatorFilter` as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources).
-       *
-       * When computing ratios, the `aggregations` and
-       * `denominator_aggregations` fields must use the same alignment period
-       * and produce time series that have the same periodicity and labels.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.Aggregation getDenominatorAggregations(int index) {
-        return denominatorAggregations_.get(index);
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series
-       * selected by `denominatorFilter` as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources).
-       *
-       * When computing ratios, the `aggregations` and
-       * `denominator_aggregations` fields must use the same alignment period
-       * and produce time series that have the same periodicity and labels.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AggregationOrBuilder getDenominatorAggregationsOrBuilder(
-          int index) {
-        return denominatorAggregations_.get(index);
-      }
+        public static final int FORECAST_HORIZON_FIELD_NUMBER = 1;
+        private com.google.protobuf.Duration forecastHorizon_;
+        /**
+         *
+         *
+         * 
+         * Required. The length of time into the future to forecast whether a
+         * time series will violate the threshold. If the predicted value is
+         * found to violate the threshold, and the violation is observed in all
+         * forecasts made for the configured `duration`, then the time series is
+         * considered to be failing.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+         * 
+         *
+         * @return Whether the forecastHorizon field is set.
+         */
+        @java.lang.Override
+        public boolean hasForecastHorizon() {
+          return forecastHorizon_ != null;
+        }
+        /**
+         *
+         *
+         * 
+         * Required. The length of time into the future to forecast whether a
+         * time series will violate the threshold. If the predicted value is
+         * found to violate the threshold, and the violation is observed in all
+         * forecasts made for the configured `duration`, then the time series is
+         * considered to be failing.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+         * 
+         *
+         * @return The forecastHorizon.
+         */
+        @java.lang.Override
+        public com.google.protobuf.Duration getForecastHorizon() {
+          return forecastHorizon_ == null
+              ? com.google.protobuf.Duration.getDefaultInstance()
+              : forecastHorizon_;
+        }
+        /**
+         *
+         *
+         * 
+         * Required. The length of time into the future to forecast whether a
+         * time series will violate the threshold. If the predicted value is
+         * found to violate the threshold, and the violation is observed in all
+         * forecasts made for the configured `duration`, then the time series is
+         * considered to be failing.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+         * 
+         */
+        @java.lang.Override
+        public com.google.protobuf.DurationOrBuilder getForecastHorizonOrBuilder() {
+          return forecastHorizon_ == null
+              ? com.google.protobuf.Duration.getDefaultInstance()
+              : forecastHorizon_;
+        }
 
-      public static final int COMPARISON_FIELD_NUMBER = 4;
-      private int comparison_ = 0;
-      /**
-       *
-       *
-       * 
-       * The comparison to apply between the time series (indicated by `filter`
-       * and `aggregation`) and the threshold (indicated by `threshold_value`).
-       * The comparison is applied on each time series, with the time series
-       * on the left-hand side and the threshold on the right-hand side.
-       *
-       * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
-       * 

-       *
-       * .google.monitoring.v3.ComparisonType comparison = 4;
-       *
-       * @return The enum numeric value on the wire for comparison.
-       */
-      @java.lang.Override
-      public int getComparisonValue() {
-        return comparison_;
-      }
-      /**
-       *
-       *
-       * 
-       * The comparison to apply between the time series (indicated by `filter`
-       * and `aggregation`) and the threshold (indicated by `threshold_value`).
-       * The comparison is applied on each time series, with the time series
-       * on the left-hand side and the threshold on the right-hand side.
-       *
-       * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
-       * 

-       *
-       * .google.monitoring.v3.ComparisonType comparison = 4;
-       *
-       * @return The comparison.
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.ComparisonType getComparison() {
-        com.google.monitoring.v3.ComparisonType result =
-            com.google.monitoring.v3.ComparisonType.forNumber(comparison_);
-        return result == null ? com.google.monitoring.v3.ComparisonType.UNRECOGNIZED : result;
-      }
+        private byte memoizedIsInitialized = -1;
 
-      public static final int THRESHOLD_VALUE_FIELD_NUMBER = 5;
-      private double thresholdValue_ = 0D;
-      /**
-       *
-       *
-       * 
-       * A value against which to compare the time series.
-       * 

-       *
-       * double threshold_value = 5;
-       *
-       * @return The thresholdValue.
-       */
-      @java.lang.Override
-      public double getThresholdValue() {
-        return thresholdValue_;
-      }
+        @java.lang.Override
+        public final boolean isInitialized() {
+          byte isInitialized = memoizedIsInitialized;
+          if (isInitialized == 1) return true;
+          if (isInitialized == 0) return false;
 
-      public static final int DURATION_FIELD_NUMBER = 6;
-      private com.google.protobuf.Duration duration_;
-      /**
-       *
-       *
-       * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
-       * 

-       *
-       * .google.protobuf.Duration duration = 6;
-       *
-       * @return Whether the duration field is set.
-       */
-      @java.lang.Override
-      public boolean hasDuration() {
-        return duration_ != null;
-      }
-      /**
-       *
-       *
-       * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
-       * 

-       *
-       * .google.protobuf.Duration duration = 6;
-       *
-       * @return The duration.
-       */
-      @java.lang.Override
-      public com.google.protobuf.Duration getDuration() {
-        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
-      }
-      /**
-       *
-       *
-       * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
-       * 

-       *
-       * .google.protobuf.Duration duration = 6;
-       */
-      @java.lang.Override
-      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
-        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
-      }
-
-      public static final int TRIGGER_FIELD_NUMBER = 7;
-      private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
-       *
-       * @return Whether the trigger field is set.
-       */
-      @java.lang.Override
-      public boolean hasTrigger() {
-        return trigger_ != null;
-      }
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
-       *
-       * @return The trigger.
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
-        return trigger_ == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-            : trigger_;
-      }
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder() {
-        return trigger_ == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-            : trigger_;
-      }
+          memoizedIsInitialized = 1;
+          return true;
+        }
 
-      public static final int EVALUATION_MISSING_DATA_FIELD_NUMBER = 11;
-      private int evaluationMissingData_ = 0;
-      /**
-       *
-       *
-       * 
-       * A condition control that determines how metric-threshold conditions
-       * are evaluated when data stops arriving.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-       * 
-       *
-       * @return The enum numeric value on the wire for evaluationMissingData.
-       */
-      @java.lang.Override
-      public int getEvaluationMissingDataValue() {
-        return evaluationMissingData_;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition control that determines how metric-threshold conditions
-       * are evaluated when data stops arriving.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-       * 
-       *
-       * @return The evaluationMissingData.
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-          getEvaluationMissingData() {
-        com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
-            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
-                evaluationMissingData_);
-        return result == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
-            : result;
-      }
+        @java.lang.Override
+        public void writeTo(com.google.protobuf.CodedOutputStream output)
+            throws java.io.IOException {
+          if (forecastHorizon_ != null) {
+            output.writeMessage(1, getForecastHorizon());
+          }
+          getUnknownFields().writeTo(output);
+        }
 
-      private byte memoizedIsInitialized = -1;
+        @java.lang.Override
+        public int getSerializedSize() {
+          int size = memoizedSize;
+          if (size != -1) return size;
 
-      @java.lang.Override
-      public final boolean isInitialized() {
-        byte isInitialized = memoizedIsInitialized;
-        if (isInitialized == 1) return true;
-        if (isInitialized == 0) return false;
+          size = 0;
+          if (forecastHorizon_ != null) {
+            size +=
+                com.google.protobuf.CodedOutputStream.computeMessageSize(1, getForecastHorizon());
+          }
+          size += getUnknownFields().getSerializedSize();
+          memoizedSize = size;
+          return size;
+        }
 
-        memoizedIsInitialized = 1;
-        return true;
-      }
+        @java.lang.Override
+        public boolean equals(final java.lang.Object obj) {
+          if (obj == this) {
+            return true;
+          }
+          if (!(obj
+              instanceof
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)) {
+            return super.equals(obj);
+          }
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions other =
+              (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions) obj;
 
-      @java.lang.Override
-      public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
-          com.google.protobuf.GeneratedMessageV3.writeString(output, 2, filter_);
-        }
-        if (comparison_
-            != com.google.monitoring.v3.ComparisonType.COMPARISON_UNSPECIFIED.getNumber()) {
-          output.writeEnum(4, comparison_);
-        }
-        if (java.lang.Double.doubleToRawLongBits(thresholdValue_) != 0) {
-          output.writeDouble(5, thresholdValue_);
+          if (hasForecastHorizon() != other.hasForecastHorizon()) return false;
+          if (hasForecastHorizon()) {
+            if (!getForecastHorizon().equals(other.getForecastHorizon())) return false;
+          }
+          if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+          return true;
         }
-        if (duration_ != null) {
-          output.writeMessage(6, getDuration());
+
+        @java.lang.Override
+        public int hashCode() {
+          if (memoizedHashCode != 0) {
+            return memoizedHashCode;
+          }
+          int hash = 41;
+          hash = (19 * hash) + getDescriptor().hashCode();
+          if (hasForecastHorizon()) {
+            hash = (37 * hash) + FORECAST_HORIZON_FIELD_NUMBER;
+            hash = (53 * hash) + getForecastHorizon().hashCode();
+          }
+          hash = (29 * hash) + getUnknownFields().hashCode();
+          memoizedHashCode = hash;
+          return hash;
         }
-        if (trigger_ != null) {
-          output.writeMessage(7, getTrigger());
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(java.nio.ByteBuffer data)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
         }
-        for (int i = 0; i < aggregations_.size(); i++) {
-          output.writeMessage(8, aggregations_.get(i));
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(
+                java.nio.ByteBuffer data,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
         }
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(denominatorFilter_)) {
-          com.google.protobuf.GeneratedMessageV3.writeString(output, 9, denominatorFilter_);
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(com.google.protobuf.ByteString data)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
         }
-        for (int i = 0; i < denominatorAggregations_.size(); i++) {
-          output.writeMessage(10, denominatorAggregations_.get(i));
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(
+                com.google.protobuf.ByteString data,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
         }
-        if (evaluationMissingData_
-            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-                .EVALUATION_MISSING_DATA_UNSPECIFIED
-                .getNumber()) {
-          output.writeEnum(11, evaluationMissingData_);
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data);
         }
-        getUnknownFields().writeTo(output);
-      }
 
-      @java.lang.Override
-      public int getSerializedSize() {
-        int size = memoizedSize;
-        if (size != -1) return size;
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+          return PARSER.parseFrom(data, extensionRegistry);
+        }
 
-        size = 0;
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
-          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, filter_);
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(java.io.InputStream input) throws java.io.IOException {
+          return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
         }
-        if (comparison_
-            != com.google.monitoring.v3.ComparisonType.COMPARISON_UNSPECIFIED.getNumber()) {
-          size += com.google.protobuf.CodedOutputStream.computeEnumSize(4, comparison_);
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(
+                java.io.InputStream input,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws java.io.IOException {
+          return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+              PARSER, input, extensionRegistry);
         }
-        if (java.lang.Double.doubleToRawLongBits(thresholdValue_) != 0) {
-          size += com.google.protobuf.CodedOutputStream.computeDoubleSize(5, thresholdValue_);
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
+          return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+              PARSER, input);
         }
-        if (duration_ != null) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(6, getDuration());
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseDelimitedFrom(
+                java.io.InputStream input,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws java.io.IOException {
+          return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+              PARSER, input, extensionRegistry);
         }
-        if (trigger_ != null) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(7, getTrigger());
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+          return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
         }
-        for (int i = 0; i < aggregations_.size(); i++) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(8, aggregations_.get(i));
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            parseFrom(
+                com.google.protobuf.CodedInputStream input,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws java.io.IOException {
+          return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+              PARSER, input, extensionRegistry);
         }
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(denominatorFilter_)) {
-          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(9, denominatorFilter_);
+
+        @java.lang.Override
+        public Builder newBuilderForType() {
+          return newBuilder();
         }
-        for (int i = 0; i < denominatorAggregations_.size(); i++) {
-          size +=
-              com.google.protobuf.CodedOutputStream.computeMessageSize(
-                  10, denominatorAggregations_.get(i));
+
+        public static Builder newBuilder() {
+          return DEFAULT_INSTANCE.toBuilder();
         }
-        if (evaluationMissingData_
-            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-                .EVALUATION_MISSING_DATA_UNSPECIFIED
-                .getNumber()) {
-          size += com.google.protobuf.CodedOutputStream.computeEnumSize(11, evaluationMissingData_);
+
+        public static Builder newBuilder(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                prototype) {
+          return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
         }
-        size += getUnknownFields().getSerializedSize();
-        memoizedSize = size;
-        return size;
-      }
 
-      @java.lang.Override
-      public boolean equals(final java.lang.Object obj) {
-        if (obj == this) {
-          return true;
+        @java.lang.Override
+        public Builder toBuilder() {
+          return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
         }
-        if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)) {
-          return super.equals(obj);
+
+        @java.lang.Override
+        protected Builder newBuilderForType(
+            com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+          Builder builder = new Builder(parent);
+          return builder;
         }
-        com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold other =
-            (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) obj;
+        /**
+         *
+         *
+         * 
+         * Options used when forecasting the time series and testing
+         * the predicted value against the threshold.
+         * 

+         *
+         * Protobuf type {@code
+         * google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions}
+         */
+        public static final class Builder
+            extends com.google.protobuf.GeneratedMessageV3.Builder
+            implements
+            // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                .ForecastOptionsOrBuilder {
+          public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+            return com.google.monitoring.v3.AlertProto
+                .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_descriptor;
+          }
 
-        if (!getFilter().equals(other.getFilter())) return false;
-        if (!getAggregationsList().equals(other.getAggregationsList())) return false;
-        if (!getDenominatorFilter().equals(other.getDenominatorFilter())) return false;
-        if (!getDenominatorAggregationsList().equals(other.getDenominatorAggregationsList()))
-          return false;
-        if (comparison_ != other.comparison_) return false;
-        if (java.lang.Double.doubleToLongBits(getThresholdValue())
-            != java.lang.Double.doubleToLongBits(other.getThresholdValue())) return false;
-        if (hasDuration() != other.hasDuration()) return false;
-        if (hasDuration()) {
-          if (!getDuration().equals(other.getDuration())) return false;
-        }
-        if (hasTrigger() != other.hasTrigger()) return false;
-        if (hasTrigger()) {
-          if (!getTrigger().equals(other.getTrigger())) return false;
-        }
-        if (evaluationMissingData_ != other.evaluationMissingData_) return false;
-        if (!getUnknownFields().equals(other.getUnknownFields())) return false;
-        return true;
-      }
+          @java.lang.Override
+          protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+              internalGetFieldAccessorTable() {
+            return com.google.monitoring.v3.AlertProto
+                .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_fieldAccessorTable
+                .ensureFieldAccessorsInitialized(
+                    com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                        .class,
+                    com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                        .Builder.class);
+          }
 
-      @java.lang.Override
-      public int hashCode() {
-        if (memoizedHashCode != 0) {
-          return memoizedHashCode;
-        }
-        int hash = 41;
-        hash = (19 * hash) + getDescriptor().hashCode();
-        hash = (37 * hash) + FILTER_FIELD_NUMBER;
-        hash = (53 * hash) + getFilter().hashCode();
-        if (getAggregationsCount() > 0) {
-          hash = (37 * hash) + AGGREGATIONS_FIELD_NUMBER;
-          hash = (53 * hash) + getAggregationsList().hashCode();
-        }
-        hash = (37 * hash) + DENOMINATOR_FILTER_FIELD_NUMBER;
-        hash = (53 * hash) + getDenominatorFilter().hashCode();
-        if (getDenominatorAggregationsCount() > 0) {
-          hash = (37 * hash) + DENOMINATOR_AGGREGATIONS_FIELD_NUMBER;
-          hash = (53 * hash) + getDenominatorAggregationsList().hashCode();
-        }
-        hash = (37 * hash) + COMPARISON_FIELD_NUMBER;
-        hash = (53 * hash) + comparison_;
-        hash = (37 * hash) + THRESHOLD_VALUE_FIELD_NUMBER;
-        hash =
-            (53 * hash)
-                + com.google.protobuf.Internal.hashLong(
-                    java.lang.Double.doubleToLongBits(getThresholdValue()));
-        if (hasDuration()) {
-          hash = (37 * hash) + DURATION_FIELD_NUMBER;
-          hash = (53 * hash) + getDuration().hashCode();
-        }
-        if (hasTrigger()) {
-          hash = (37 * hash) + TRIGGER_FIELD_NUMBER;
-          hash = (53 * hash) + getTrigger().hashCode();
-        }
-        hash = (37 * hash) + EVALUATION_MISSING_DATA_FIELD_NUMBER;
-        hash = (53 * hash) + evaluationMissingData_;
-        hash = (29 * hash) + getUnknownFields().hashCode();
-        memoizedHashCode = hash;
-        return hash;
-      }
+          // Construct using
+          // com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions.newBuilder()
+          private Builder() {}
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data);
-      }
+          private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+            super(parent);
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data, extensionRegistry);
-      }
+          @java.lang.Override
+          public Builder clear() {
+            super.clear();
+            bitField0_ = 0;
+            forecastHorizon_ = null;
+            if (forecastHorizonBuilder_ != null) {
+              forecastHorizonBuilder_.dispose();
+              forecastHorizonBuilder_ = null;
+            }
+            return this;
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          com.google.protobuf.ByteString data)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data);
-      }
+          @java.lang.Override
+          public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+            return com.google.monitoring.v3.AlertProto
+                .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_descriptor;
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          com.google.protobuf.ByteString data,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data, extensionRegistry);
-      }
+          @java.lang.Override
+          public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+              getDefaultInstanceForType() {
+            return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                .getDefaultInstance();
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data);
-      }
+          @java.lang.Override
+          public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+              build() {
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions result =
+                buildPartial();
+            if (!result.isInitialized()) {
+              throw newUninitializedMessageException(result);
+            }
+            return result;
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data, extensionRegistry);
-      }
+          @java.lang.Override
+          public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+              buildPartial() {
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions result =
+                new com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions(
+                    this);
+            if (bitField0_ != 0) {
+              buildPartial0(result);
+            }
+            onBuilt();
+            return result;
+          }
+
+          private void buildPartial0(
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                  result) {
+            int from_bitField0_ = bitField0_;
+            if (((from_bitField0_ & 0x00000001) != 0)) {
+              result.forecastHorizon_ =
+                  forecastHorizonBuilder_ == null
+                      ? forecastHorizon_
+                      : forecastHorizonBuilder_.build();
+            }
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          java.io.InputStream input) throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
-      }
+          @java.lang.Override
+          public Builder clone() {
+            return super.clone();
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
-            PARSER, input, extensionRegistry);
-      }
+          @java.lang.Override
+          public Builder setField(
+              com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+            return super.setField(field, value);
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-          parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
-      }
+          @java.lang.Override
+          public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+            return super.clearField(field);
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-          parseDelimitedFrom(
-              java.io.InputStream input,
+          @java.lang.Override
+          public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+            return super.clearOneof(oneof);
+          }
+
+          @java.lang.Override
+          public Builder setRepeatedField(
+              com.google.protobuf.Descriptors.FieldDescriptor field,
+              int index,
+              java.lang.Object value) {
+            return super.setRepeatedField(field, index, value);
+          }
+
+          @java.lang.Override
+          public Builder addRepeatedField(
+              com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+            return super.addRepeatedField(field, value);
+          }
+
+          @java.lang.Override
+          public Builder mergeFrom(com.google.protobuf.Message other) {
+            if (other
+                instanceof
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions) {
+              return mergeFrom(
+                  (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)
+                      other);
+            } else {
+              super.mergeFrom(other);
+              return this;
+            }
+          }
+
+          public Builder mergeFrom(
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                  other) {
+            if (other
+                == com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                    .getDefaultInstance()) return this;
+            if (other.hasForecastHorizon()) {
+              mergeForecastHorizon(other.getForecastHorizon());
+            }
+            this.mergeUnknownFields(other.getUnknownFields());
+            onChanged();
+            return this;
+          }
+
+          @java.lang.Override
+          public final boolean isInitialized() {
+            return true;
+          }
+
+          @java.lang.Override
+          public Builder mergeFrom(
+              com.google.protobuf.CodedInputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
               throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
-            PARSER, input, extensionRegistry);
-      }
+            if (extensionRegistry == null) {
+              throw new java.lang.NullPointerException();
+            }
+            try {
+              boolean done = false;
+              while (!done) {
+                int tag = input.readTag();
+                switch (tag) {
+                  case 0:
+                    done = true;
+                    break;
+                  case 10:
+                    {
+                      input.readMessage(
+                          getForecastHorizonFieldBuilder().getBuilder(), extensionRegistry);
+                      bitField0_ |= 0x00000001;
+                      break;
+                    } // case 10
+                  default:
+                    {
+                      if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                        done = true; // was an endgroup tag
+                      }
+                      break;
+                    } // default:
+                } // switch (tag)
+              } // while (!done)
+            } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+              throw e.unwrapIOException();
+            } finally {
+              onChanged();
+            } // finally
+            return this;
+          }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          com.google.protobuf.CodedInputStream input) throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
-      }
+          private int bitField0_;
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
-          com.google.protobuf.CodedInputStream input,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
-            PARSER, input, extensionRegistry);
-      }
+          private com.google.protobuf.Duration forecastHorizon_;
+          private com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.protobuf.Duration,
+                  com.google.protobuf.Duration.Builder,
+                  com.google.protobuf.DurationOrBuilder>
+              forecastHorizonBuilder_;
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           *
+           * @return Whether the forecastHorizon field is set.
+           */
+          public boolean hasForecastHorizon() {
+            return ((bitField0_ & 0x00000001) != 0);
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           *
+           * @return The forecastHorizon.
+           */
+          public com.google.protobuf.Duration getForecastHorizon() {
+            if (forecastHorizonBuilder_ == null) {
+              return forecastHorizon_ == null
+                  ? com.google.protobuf.Duration.getDefaultInstance()
+                  : forecastHorizon_;
+            } else {
+              return forecastHorizonBuilder_.getMessage();
+            }
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          public Builder setForecastHorizon(com.google.protobuf.Duration value) {
+            if (forecastHorizonBuilder_ == null) {
+              if (value == null) {
+                throw new NullPointerException();
+              }
+              forecastHorizon_ = value;
+            } else {
+              forecastHorizonBuilder_.setMessage(value);
+            }
+            bitField0_ |= 0x00000001;
+            onChanged();
+            return this;
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          public Builder setForecastHorizon(com.google.protobuf.Duration.Builder builderForValue) {
+            if (forecastHorizonBuilder_ == null) {
+              forecastHorizon_ = builderForValue.build();
+            } else {
+              forecastHorizonBuilder_.setMessage(builderForValue.build());
+            }
+            bitField0_ |= 0x00000001;
+            onChanged();
+            return this;
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          public Builder mergeForecastHorizon(com.google.protobuf.Duration value) {
+            if (forecastHorizonBuilder_ == null) {
+              if (((bitField0_ & 0x00000001) != 0)
+                  && forecastHorizon_ != null
+                  && forecastHorizon_ != com.google.protobuf.Duration.getDefaultInstance()) {
+                getForecastHorizonBuilder().mergeFrom(value);
+              } else {
+                forecastHorizon_ = value;
+              }
+            } else {
+              forecastHorizonBuilder_.mergeFrom(value);
+            }
+            bitField0_ |= 0x00000001;
+            onChanged();
+            return this;
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          public Builder clearForecastHorizon() {
+            bitField0_ = (bitField0_ & ~0x00000001);
+            forecastHorizon_ = null;
+            if (forecastHorizonBuilder_ != null) {
+              forecastHorizonBuilder_.dispose();
+              forecastHorizonBuilder_ = null;
+            }
+            onChanged();
+            return this;
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          public com.google.protobuf.Duration.Builder getForecastHorizonBuilder() {
+            bitField0_ |= 0x00000001;
+            onChanged();
+            return getForecastHorizonFieldBuilder().getBuilder();
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          public com.google.protobuf.DurationOrBuilder getForecastHorizonOrBuilder() {
+            if (forecastHorizonBuilder_ != null) {
+              return forecastHorizonBuilder_.getMessageOrBuilder();
+            } else {
+              return forecastHorizon_ == null
+                  ? com.google.protobuf.Duration.getDefaultInstance()
+                  : forecastHorizon_;
+            }
+          }
+          /**
+           *
+           *
+           * 
+           * Required. The length of time into the future to forecast whether a
+           * time series will violate the threshold. If the predicted value is
+           * found to violate the threshold, and the violation is observed in all
+           * forecasts made for the configured `duration`, then the time series is
+           * considered to be failing.
+           * 

+           *
+           * 
+           * .google.protobuf.Duration forecast_horizon = 1 [(.google.api.field_behavior) = REQUIRED];
+           * 
+           */
+          private com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.protobuf.Duration,
+                  com.google.protobuf.Duration.Builder,
+                  com.google.protobuf.DurationOrBuilder>
+              getForecastHorizonFieldBuilder() {
+            if (forecastHorizonBuilder_ == null) {
+              forecastHorizonBuilder_ =
+                  new com.google.protobuf.SingleFieldBuilderV3<
+                      com.google.protobuf.Duration,
+                      com.google.protobuf.Duration.Builder,
+                      com.google.protobuf.DurationOrBuilder>(
+                      getForecastHorizon(), getParentForChildren(), isClean());
+              forecastHorizon_ = null;
+            }
+            return forecastHorizonBuilder_;
+          }
 
-      @java.lang.Override
-      public Builder newBuilderForType() {
-        return newBuilder();
-      }
+          @java.lang.Override
+          public final Builder setUnknownFields(
+              final com.google.protobuf.UnknownFieldSet unknownFields) {
+            return super.setUnknownFields(unknownFields);
+          }
 
-      public static Builder newBuilder() {
-        return DEFAULT_INSTANCE.toBuilder();
-      }
+          @java.lang.Override
+          public final Builder mergeUnknownFields(
+              final com.google.protobuf.UnknownFieldSet unknownFields) {
+            return super.mergeUnknownFields(unknownFields);
+          }
+
+          // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)
+        }
+
+        // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions)
+        private static final com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                .ForecastOptions
+            DEFAULT_INSTANCE;
+
+        static {
+          DEFAULT_INSTANCE =
+              new com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions();
+        }
+
+        public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            getDefaultInstance() {
+          return DEFAULT_INSTANCE;
+        }
+
+        private static final com.google.protobuf.Parser PARSER =
+            new com.google.protobuf.AbstractParser() {
+              @java.lang.Override
+              public ForecastOptions parsePartialFrom(
+                  com.google.protobuf.CodedInputStream input,
+                  com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                  throws com.google.protobuf.InvalidProtocolBufferException {
+                Builder builder = newBuilder();
+                try {
+                  builder.mergeFrom(input, extensionRegistry);
+                } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+                  throw e.setUnfinishedMessage(builder.buildPartial());
+                } catch (com.google.protobuf.UninitializedMessageException e) {
+                  throw e.asInvalidProtocolBufferException()
+                      .setUnfinishedMessage(builder.buildPartial());
+                } catch (java.io.IOException e) {
+                  throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                      .setUnfinishedMessage(builder.buildPartial());
+                }
+                return builder.buildPartial();
+              }
+            };
 
-      public static Builder newBuilder(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold prototype) {
-        return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
-      }
+        public static com.google.protobuf.Parser parser() {
+          return PARSER;
+        }
 
-      @java.lang.Override
-      public Builder toBuilder() {
-        return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
-      }
+        @java.lang.Override
+        public com.google.protobuf.Parser getParserForType() {
+          return PARSER;
+        }
 
-      @java.lang.Override
-      protected Builder newBuilderForType(
-          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-        Builder builder = new Builder(parent);
-        return builder;
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            getDefaultInstanceForType() {
+          return DEFAULT_INSTANCE;
+        }
       }
+
+      public static final int FILTER_FIELD_NUMBER = 2;
+
+      @SuppressWarnings("serial")
+      private volatile java.lang.Object filter_ = "";
       /**
        *
        *
        * 
-       * A condition type that compares a collection of time series
-       * against a threshold.
-       * 

+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies which time series should be compared with the threshold.
        *
-       * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.MetricThreshold}
+       * The filter is similar to the one that is specified in the
+       * [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+       * (that call is useful to verify the time series that will be retrieved /
+       * processed). The filter must specify the metric type and the resource
+       * type. Optionally, it can specify resource labels and metric labels.
+       * This field must not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The filter.
        */
-      public static final class Builder
-          extends com.google.protobuf.GeneratedMessageV3.Builder
-          implements
-          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder {
-        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
-          return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_descriptor;
-        }
-
-        @java.lang.Override
-        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-            internalGetFieldAccessorTable() {
-          return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_fieldAccessorTable
-              .ensureFieldAccessorsInitialized(
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.class,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder.class);
-        }
-
-        // Construct using
-        // com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.newBuilder()
-        private Builder() {}
-
-        private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-          super(parent);
+      @java.lang.Override
+      public java.lang.String getFilter() {
+        java.lang.Object ref = filter_;
+        if (ref instanceof java.lang.String) {
+          return (java.lang.String) ref;
+        } else {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          filter_ = s;
+          return s;
         }
-
-        @java.lang.Override
-        public Builder clear() {
-          super.clear();
-          bitField0_ = 0;
-          filter_ = "";
-          if (aggregationsBuilder_ == null) {
-            aggregations_ = java.util.Collections.emptyList();
-          } else {
-            aggregations_ = null;
-            aggregationsBuilder_.clear();
-          }
-          bitField0_ = (bitField0_ & ~0x00000002);
-          denominatorFilter_ = "";
-          if (denominatorAggregationsBuilder_ == null) {
-            denominatorAggregations_ = java.util.Collections.emptyList();
-          } else {
-            denominatorAggregations_ = null;
-            denominatorAggregationsBuilder_.clear();
-          }
-          bitField0_ = (bitField0_ & ~0x00000008);
-          comparison_ = 0;
-          thresholdValue_ = 0D;
-          duration_ = null;
-          if (durationBuilder_ != null) {
-            durationBuilder_.dispose();
-            durationBuilder_ = null;
-          }
-          trigger_ = null;
-          if (triggerBuilder_ != null) {
-            triggerBuilder_.dispose();
-            triggerBuilder_ = null;
-          }
-          evaluationMissingData_ = 0;
-          return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies which time series should be compared with the threshold.
+       *
+       * The filter is similar to the one that is specified in the
+       * [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+       * (that call is useful to verify the time series that will be retrieved /
+       * processed). The filter must specify the metric type and the resource
+       * type. Optionally, it can specify resource labels and metric labels.
+       * This field must not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The bytes for filter.
+       */
+      @java.lang.Override
+      public com.google.protobuf.ByteString getFilterBytes() {
+        java.lang.Object ref = filter_;
+        if (ref instanceof java.lang.String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          filter_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
         }
+      }
 
-        @java.lang.Override
-        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
-          return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_descriptor;
-        }
+      public static final int AGGREGATIONS_FIELD_NUMBER = 8;
 
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-            getDefaultInstanceForType() {
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-              .getDefaultInstance();
-        }
+      @SuppressWarnings("serial")
+      private java.util.List aggregations_;
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
+       */
+      @java.lang.Override
+      public java.util.List getAggregationsList() {
+        return aggregations_;
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
+       */
+      @java.lang.Override
+      public java.util.List
+          getAggregationsOrBuilderList() {
+        return aggregations_;
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
+       */
+      @java.lang.Override
+      public int getAggregationsCount() {
+        return aggregations_.size();
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.Aggregation getAggregations(int index) {
+        return aggregations_.get(index);
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 8;
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index) {
+        return aggregations_.get(index);
+      }
 
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold build() {
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result = buildPartial();
-          if (!result.isInitialized()) {
-            throw newUninitializedMessageException(result);
-          }
-          return result;
-        }
+      public static final int DENOMINATOR_FILTER_FIELD_NUMBER = 9;
 
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold buildPartial() {
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result =
-              new com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold(this);
-          buildPartialRepeatedFields(result);
-          if (bitField0_ != 0) {
-            buildPartial0(result);
-          }
-          onBuilt();
-          return result;
-        }
-
-        private void buildPartialRepeatedFields(
-            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result) {
-          if (aggregationsBuilder_ == null) {
-            if (((bitField0_ & 0x00000002) != 0)) {
-              aggregations_ = java.util.Collections.unmodifiableList(aggregations_);
-              bitField0_ = (bitField0_ & ~0x00000002);
-            }
-            result.aggregations_ = aggregations_;
-          } else {
-            result.aggregations_ = aggregationsBuilder_.build();
-          }
-          if (denominatorAggregationsBuilder_ == null) {
-            if (((bitField0_ & 0x00000008) != 0)) {
-              denominatorAggregations_ =
-                  java.util.Collections.unmodifiableList(denominatorAggregations_);
-              bitField0_ = (bitField0_ & ~0x00000008);
-            }
-            result.denominatorAggregations_ = denominatorAggregations_;
-          } else {
-            result.denominatorAggregations_ = denominatorAggregationsBuilder_.build();
-          }
-        }
-
-        private void buildPartial0(
-            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result) {
-          int from_bitField0_ = bitField0_;
-          if (((from_bitField0_ & 0x00000001) != 0)) {
-            result.filter_ = filter_;
-          }
-          if (((from_bitField0_ & 0x00000004) != 0)) {
-            result.denominatorFilter_ = denominatorFilter_;
-          }
-          if (((from_bitField0_ & 0x00000010) != 0)) {
-            result.comparison_ = comparison_;
-          }
-          if (((from_bitField0_ & 0x00000020) != 0)) {
-            result.thresholdValue_ = thresholdValue_;
-          }
-          if (((from_bitField0_ & 0x00000040) != 0)) {
-            result.duration_ = durationBuilder_ == null ? duration_ : durationBuilder_.build();
-          }
-          if (((from_bitField0_ & 0x00000080) != 0)) {
-            result.trigger_ = triggerBuilder_ == null ? trigger_ : triggerBuilder_.build();
-          }
-          if (((from_bitField0_ & 0x00000100) != 0)) {
-            result.evaluationMissingData_ = evaluationMissingData_;
-          }
-        }
-
-        @java.lang.Override
-        public Builder clone() {
-          return super.clone();
+      @SuppressWarnings("serial")
+      private volatile java.lang.Object denominatorFilter_ = "";
+      /**
+       *
+       *
+       * 
+       * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies a time series that should be used as the denominator of a
+       * ratio that will be compared with the threshold. If a
+       * `denominator_filter` is specified, the time series specified by the
+       * `filter` field will be used as the numerator.
+       *
+       * The filter must specify the metric type and optionally may contain
+       * restrictions on resource type, resource labels, and metric labels.
+       * This field may not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string denominator_filter = 9;
+       *
+       * @return The denominatorFilter.
+       */
+      @java.lang.Override
+      public java.lang.String getDenominatorFilter() {
+        java.lang.Object ref = denominatorFilter_;
+        if (ref instanceof java.lang.String) {
+          return (java.lang.String) ref;
+        } else {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          denominatorFilter_ = s;
+          return s;
         }
-
-        @java.lang.Override
-        public Builder setField(
-            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-          return super.setField(field, value);
+      }
+      /**
+       *
+       *
+       * 
+       * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies a time series that should be used as the denominator of a
+       * ratio that will be compared with the threshold. If a
+       * `denominator_filter` is specified, the time series specified by the
+       * `filter` field will be used as the numerator.
+       *
+       * The filter must specify the metric type and optionally may contain
+       * restrictions on resource type, resource labels, and metric labels.
+       * This field may not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string denominator_filter = 9;
+       *
+       * @return The bytes for denominatorFilter.
+       */
+      @java.lang.Override
+      public com.google.protobuf.ByteString getDenominatorFilterBytes() {
+        java.lang.Object ref = denominatorFilter_;
+        if (ref instanceof java.lang.String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          denominatorFilter_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
         }
+      }
 
-        @java.lang.Override
-        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-          return super.clearField(field);
-        }
+      public static final int DENOMINATOR_AGGREGATIONS_FIELD_NUMBER = 10;
 
-        @java.lang.Override
-        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-          return super.clearOneof(oneof);
-        }
+      @SuppressWarnings("serial")
+      private java.util.List denominatorAggregations_;
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series
+       * selected by `denominatorFilter` as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources).
+       *
+       * When computing ratios, the `aggregations` and
+       * `denominator_aggregations` fields must use the same alignment period
+       * and produce time series that have the same periodicity and labels.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+       */
+      @java.lang.Override
+      public java.util.List getDenominatorAggregationsList() {
+        return denominatorAggregations_;
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series
+       * selected by `denominatorFilter` as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources).
+       *
+       * When computing ratios, the `aggregations` and
+       * `denominator_aggregations` fields must use the same alignment period
+       * and produce time series that have the same periodicity and labels.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+       */
+      @java.lang.Override
+      public java.util.List
+          getDenominatorAggregationsOrBuilderList() {
+        return denominatorAggregations_;
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series
+       * selected by `denominatorFilter` as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources).
+       *
+       * When computing ratios, the `aggregations` and
+       * `denominator_aggregations` fields must use the same alignment period
+       * and produce time series that have the same periodicity and labels.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+       */
+      @java.lang.Override
+      public int getDenominatorAggregationsCount() {
+        return denominatorAggregations_.size();
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series
+       * selected by `denominatorFilter` as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources).
+       *
+       * When computing ratios, the `aggregations` and
+       * `denominator_aggregations` fields must use the same alignment period
+       * and produce time series that have the same periodicity and labels.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.Aggregation getDenominatorAggregations(int index) {
+        return denominatorAggregations_.get(index);
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series
+       * selected by `denominatorFilter` as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources).
+       *
+       * When computing ratios, the `aggregations` and
+       * `denominator_aggregations` fields must use the same alignment period
+       * and produce time series that have the same periodicity and labels.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AggregationOrBuilder getDenominatorAggregationsOrBuilder(
+          int index) {
+        return denominatorAggregations_.get(index);
+      }
 
-        @java.lang.Override
-        public Builder setRepeatedField(
-            com.google.protobuf.Descriptors.FieldDescriptor field,
-            int index,
-            java.lang.Object value) {
-          return super.setRepeatedField(field, index, value);
-        }
-
-        @java.lang.Override
-        public Builder addRepeatedField(
-            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-          return super.addRepeatedField(field, value);
-        }
-
-        @java.lang.Override
-        public Builder mergeFrom(com.google.protobuf.Message other) {
-          if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) {
-            return mergeFrom(
-                (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) other);
-          } else {
-            super.mergeFrom(other);
-            return this;
-          }
-        }
+      public static final int FORECAST_OPTIONS_FIELD_NUMBER = 12;
+      private com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+          forecastOptions_;
+      /**
+       *
+       *
+       * 
+       * When this field is present, the `MetricThreshold` condition forecasts
+       * whether the time series is predicted to violate the threshold within
+       * the `forecast_horizon`. When this field is not set, the
+       * `MetricThreshold` tests the current value of the timeseries against the
+       * threshold.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+       * 
+       *
+       * @return Whether the forecastOptions field is set.
+       */
+      @java.lang.Override
+      public boolean hasForecastOptions() {
+        return forecastOptions_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * When this field is present, the `MetricThreshold` condition forecasts
+       * whether the time series is predicted to violate the threshold within
+       * the `forecast_horizon`. When this field is not set, the
+       * `MetricThreshold` tests the current value of the timeseries against the
+       * threshold.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+       * 
+       *
+       * @return The forecastOptions.
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+          getForecastOptions() {
+        return forecastOptions_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                .getDefaultInstance()
+            : forecastOptions_;
+      }
+      /**
+       *
+       *
+       * 
+       * When this field is present, the `MetricThreshold` condition forecasts
+       * whether the time series is predicted to violate the threshold within
+       * the `forecast_horizon`. When this field is not set, the
+       * `MetricThreshold` tests the current value of the timeseries against the
+       * threshold.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+       * 
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptionsOrBuilder
+          getForecastOptionsOrBuilder() {
+        return forecastOptions_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                .getDefaultInstance()
+            : forecastOptions_;
+      }
 
-        public Builder mergeFrom(
-            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold other) {
-          if (other
-              == com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-                  .getDefaultInstance()) return this;
-          if (!other.getFilter().isEmpty()) {
-            filter_ = other.filter_;
-            bitField0_ |= 0x00000001;
-            onChanged();
-          }
-          if (aggregationsBuilder_ == null) {
-            if (!other.aggregations_.isEmpty()) {
-              if (aggregations_.isEmpty()) {
-                aggregations_ = other.aggregations_;
-                bitField0_ = (bitField0_ & ~0x00000002);
-              } else {
-                ensureAggregationsIsMutable();
-                aggregations_.addAll(other.aggregations_);
-              }
-              onChanged();
-            }
-          } else {
-            if (!other.aggregations_.isEmpty()) {
-              if (aggregationsBuilder_.isEmpty()) {
-                aggregationsBuilder_.dispose();
-                aggregationsBuilder_ = null;
-                aggregations_ = other.aggregations_;
-                bitField0_ = (bitField0_ & ~0x00000002);
-                aggregationsBuilder_ =
-                    com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
-                        ? getAggregationsFieldBuilder()
-                        : null;
-              } else {
-                aggregationsBuilder_.addAllMessages(other.aggregations_);
-              }
-            }
-          }
-          if (!other.getDenominatorFilter().isEmpty()) {
-            denominatorFilter_ = other.denominatorFilter_;
-            bitField0_ |= 0x00000004;
-            onChanged();
-          }
-          if (denominatorAggregationsBuilder_ == null) {
-            if (!other.denominatorAggregations_.isEmpty()) {
-              if (denominatorAggregations_.isEmpty()) {
-                denominatorAggregations_ = other.denominatorAggregations_;
-                bitField0_ = (bitField0_ & ~0x00000008);
-              } else {
-                ensureDenominatorAggregationsIsMutable();
-                denominatorAggregations_.addAll(other.denominatorAggregations_);
-              }
-              onChanged();
-            }
-          } else {
-            if (!other.denominatorAggregations_.isEmpty()) {
-              if (denominatorAggregationsBuilder_.isEmpty()) {
-                denominatorAggregationsBuilder_.dispose();
-                denominatorAggregationsBuilder_ = null;
-                denominatorAggregations_ = other.denominatorAggregations_;
-                bitField0_ = (bitField0_ & ~0x00000008);
-                denominatorAggregationsBuilder_ =
-                    com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
-                        ? getDenominatorAggregationsFieldBuilder()
-                        : null;
-              } else {
-                denominatorAggregationsBuilder_.addAllMessages(other.denominatorAggregations_);
-              }
-            }
-          }
-          if (other.comparison_ != 0) {
-            setComparisonValue(other.getComparisonValue());
-          }
-          if (other.getThresholdValue() != 0D) {
-            setThresholdValue(other.getThresholdValue());
-          }
-          if (other.hasDuration()) {
-            mergeDuration(other.getDuration());
-          }
-          if (other.hasTrigger()) {
-            mergeTrigger(other.getTrigger());
-          }
-          if (other.evaluationMissingData_ != 0) {
-            setEvaluationMissingDataValue(other.getEvaluationMissingDataValue());
-          }
-          this.mergeUnknownFields(other.getUnknownFields());
-          onChanged();
-          return this;
-        }
+      public static final int COMPARISON_FIELD_NUMBER = 4;
+      private int comparison_ = 0;
+      /**
+       *
+       *
+       * 
+       * The comparison to apply between the time series (indicated by `filter`
+       * and `aggregation`) and the threshold (indicated by `threshold_value`).
+       * The comparison is applied on each time series, with the time series
+       * on the left-hand side and the threshold on the right-hand side.
+       *
+       * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+       * 

+       *
+       * .google.monitoring.v3.ComparisonType comparison = 4;
+       *
+       * @return The enum numeric value on the wire for comparison.
+       */
+      @java.lang.Override
+      public int getComparisonValue() {
+        return comparison_;
+      }
+      /**
+       *
+       *
+       * 
+       * The comparison to apply between the time series (indicated by `filter`
+       * and `aggregation`) and the threshold (indicated by `threshold_value`).
+       * The comparison is applied on each time series, with the time series
+       * on the left-hand side and the threshold on the right-hand side.
+       *
+       * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+       * 

+       *
+       * .google.monitoring.v3.ComparisonType comparison = 4;
+       *
+       * @return The comparison.
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.ComparisonType getComparison() {
+        com.google.monitoring.v3.ComparisonType result =
+            com.google.monitoring.v3.ComparisonType.forNumber(comparison_);
+        return result == null ? com.google.monitoring.v3.ComparisonType.UNRECOGNIZED : result;
+      }
 
-        @java.lang.Override
-        public final boolean isInitialized() {
-          return true;
-        }
+      public static final int THRESHOLD_VALUE_FIELD_NUMBER = 5;
+      private double thresholdValue_ = 0D;
+      /**
+       *
+       *
+       * 
+       * A value against which to compare the time series.
+       * 

+       *
+       * double threshold_value = 5;
+       *
+       * @return The thresholdValue.
+       */
+      @java.lang.Override
+      public double getThresholdValue() {
+        return thresholdValue_;
+      }
 
-        @java.lang.Override
-        public Builder mergeFrom(
-            com.google.protobuf.CodedInputStream input,
-            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-            throws java.io.IOException {
-          if (extensionRegistry == null) {
-            throw new java.lang.NullPointerException();
-          }
-          try {
-            boolean done = false;
-            while (!done) {
-              int tag = input.readTag();
-              switch (tag) {
-                case 0:
-                  done = true;
-                  break;
-                case 18:
-                  {
-                    filter_ = input.readStringRequireUtf8();
-                    bitField0_ |= 0x00000001;
-                    break;
-                  } // case 18
-                case 32:
-                  {
-                    comparison_ = input.readEnum();
-                    bitField0_ |= 0x00000010;
-                    break;
-                  } // case 32
-                case 41:
-                  {
-                    thresholdValue_ = input.readDouble();
-                    bitField0_ |= 0x00000020;
-                    break;
-                  } // case 41
-                case 50:
-                  {
-                    input.readMessage(getDurationFieldBuilder().getBuilder(), extensionRegistry);
-                    bitField0_ |= 0x00000040;
-                    break;
-                  } // case 50
-                case 58:
-                  {
-                    input.readMessage(getTriggerFieldBuilder().getBuilder(), extensionRegistry);
-                    bitField0_ |= 0x00000080;
-                    break;
-                  } // case 58
-                case 66:
-                  {
-                    com.google.monitoring.v3.Aggregation m =
-                        input.readMessage(
-                            com.google.monitoring.v3.Aggregation.parser(), extensionRegistry);
-                    if (aggregationsBuilder_ == null) {
-                      ensureAggregationsIsMutable();
-                      aggregations_.add(m);
-                    } else {
-                      aggregationsBuilder_.addMessage(m);
-                    }
-                    break;
-                  } // case 66
-                case 74:
-                  {
-                    denominatorFilter_ = input.readStringRequireUtf8();
-                    bitField0_ |= 0x00000004;
-                    break;
-                  } // case 74
-                case 82:
-                  {
-                    com.google.monitoring.v3.Aggregation m =
-                        input.readMessage(
-                            com.google.monitoring.v3.Aggregation.parser(), extensionRegistry);
-                    if (denominatorAggregationsBuilder_ == null) {
-                      ensureDenominatorAggregationsIsMutable();
-                      denominatorAggregations_.add(m);
-                    } else {
-                      denominatorAggregationsBuilder_.addMessage(m);
-                    }
-                    break;
-                  } // case 82
-                case 88:
-                  {
-                    evaluationMissingData_ = input.readEnum();
-                    bitField0_ |= 0x00000100;
-                    break;
-                  } // case 88
-                default:
-                  {
-                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
-                      done = true; // was an endgroup tag
-                    }
-                    break;
-                  } // default:
-              } // switch (tag)
-            } // while (!done)
-          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-            throw e.unwrapIOException();
-          } finally {
-            onChanged();
-          } // finally
-          return this;
-        }
+      public static final int DURATION_FIELD_NUMBER = 6;
+      private com.google.protobuf.Duration duration_;
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

+       *
+       * .google.protobuf.Duration duration = 6;
+       *
+       * @return Whether the duration field is set.
+       */
+      @java.lang.Override
+      public boolean hasDuration() {
+        return duration_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

+       *
+       * .google.protobuf.Duration duration = 6;
+       *
+       * @return The duration.
+       */
+      @java.lang.Override
+      public com.google.protobuf.Duration getDuration() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      }
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

+       *
+       * .google.protobuf.Duration duration = 6;
+       */
+      @java.lang.Override
+      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      }
 
-        private int bitField0_;
+      public static final int TRIGGER_FIELD_NUMBER = 7;
+      private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+       *
+       * @return Whether the trigger field is set.
+       */
+      @java.lang.Override
+      public boolean hasTrigger() {
+        return trigger_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+       *
+       * @return The trigger.
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
+        return trigger_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+            : trigger_;
+      }
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder() {
+        return trigger_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+            : trigger_;
+      }
 
-        private java.lang.Object filter_ = "";
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return The filter.
-         */
-        public java.lang.String getFilter() {
-          java.lang.Object ref = filter_;
-          if (!(ref instanceof java.lang.String)) {
-            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-            java.lang.String s = bs.toStringUtf8();
-            filter_ = s;
-            return s;
-          } else {
-            return (java.lang.String) ref;
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return The bytes for filter.
-         */
-        public com.google.protobuf.ByteString getFilterBytes() {
-          java.lang.Object ref = filter_;
-          if (ref instanceof String) {
-            com.google.protobuf.ByteString b =
-                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-            filter_ = b;
-            return b;
-          } else {
-            return (com.google.protobuf.ByteString) ref;
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @param value The filter to set.
-         * @return This builder for chaining.
-         */
-        public Builder setFilter(java.lang.String value) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          filter_ = value;
-          bitField0_ |= 0x00000001;
-          onChanged();
-          return this;
+      public static final int EVALUATION_MISSING_DATA_FIELD_NUMBER = 11;
+      private int evaluationMissingData_ = 0;
+      /**
+       *
+       *
+       * 
+       * A condition control that determines how metric-threshold conditions
+       * are evaluated when data stops arriving.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+       * 
+       *
+       * @return The enum numeric value on the wire for evaluationMissingData.
+       */
+      @java.lang.Override
+      public int getEvaluationMissingDataValue() {
+        return evaluationMissingData_;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition control that determines how metric-threshold conditions
+       * are evaluated when data stops arriving.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+       * 
+       *
+       * @return The evaluationMissingData.
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+          getEvaluationMissingData() {
+        com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
+            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
+                evaluationMissingData_);
+        return result == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
+            : result;
+      }
+
+      private byte memoizedIsInitialized = -1;
+
+      @java.lang.Override
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized == 1) return true;
+        if (isInitialized == 0) return false;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      @java.lang.Override
+      public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 2, filter_);
         }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return This builder for chaining.
-         */
-        public Builder clearFilter() {
-          filter_ = getDefaultInstance().getFilter();
-          bitField0_ = (bitField0_ & ~0x00000001);
-          onChanged();
-          return this;
+        if (comparison_
+            != com.google.monitoring.v3.ComparisonType.COMPARISON_UNSPECIFIED.getNumber()) {
+          output.writeEnum(4, comparison_);
         }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @param value The bytes for filter to set.
-         * @return This builder for chaining.
-         */
-        public Builder setFilterBytes(com.google.protobuf.ByteString value) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          checkByteStringIsUtf8(value);
-          filter_ = value;
-          bitField0_ |= 0x00000001;
-          onChanged();
-          return this;
+        if (java.lang.Double.doubleToRawLongBits(thresholdValue_) != 0) {
+          output.writeDouble(5, thresholdValue_);
         }
-
-        private java.util.List aggregations_ =
-            java.util.Collections.emptyList();
-
-        private void ensureAggregationsIsMutable() {
-          if (!((bitField0_ & 0x00000002) != 0)) {
-            aggregations_ =
-                new java.util.ArrayList(aggregations_);
-            bitField0_ |= 0x00000002;
-          }
+        if (duration_ != null) {
+          output.writeMessage(6, getDuration());
+        }
+        if (trigger_ != null) {
+          output.writeMessage(7, getTrigger());
+        }
+        for (int i = 0; i < aggregations_.size(); i++) {
+          output.writeMessage(8, aggregations_.get(i));
+        }
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(denominatorFilter_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 9, denominatorFilter_);
+        }
+        for (int i = 0; i < denominatorAggregations_.size(); i++) {
+          output.writeMessage(10, denominatorAggregations_.get(i));
+        }
+        if (evaluationMissingData_
+            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+                .EVALUATION_MISSING_DATA_UNSPECIFIED
+                .getNumber()) {
+          output.writeEnum(11, evaluationMissingData_);
         }
+        if (forecastOptions_ != null) {
+          output.writeMessage(12, getForecastOptions());
+        }
+        getUnknownFields().writeTo(output);
+      }
 
-        private com.google.protobuf.RepeatedFieldBuilderV3<
-                com.google.monitoring.v3.Aggregation,
-                com.google.monitoring.v3.Aggregation.Builder,
-                com.google.monitoring.v3.AggregationOrBuilder>
-            aggregationsBuilder_;
+      @java.lang.Override
+      public int getSerializedSize() {
+        int size = memoizedSize;
+        if (size != -1) return size;
 
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public java.util.List getAggregationsList() {
-          if (aggregationsBuilder_ == null) {
-            return java.util.Collections.unmodifiableList(aggregations_);
-          } else {
-            return aggregationsBuilder_.getMessageList();
-          }
+        size = 0;
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, filter_);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public int getAggregationsCount() {
-          if (aggregationsBuilder_ == null) {
-            return aggregations_.size();
-          } else {
-            return aggregationsBuilder_.getCount();
-          }
+        if (comparison_
+            != com.google.monitoring.v3.ComparisonType.COMPARISON_UNSPECIFIED.getNumber()) {
+          size += com.google.protobuf.CodedOutputStream.computeEnumSize(4, comparison_);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public com.google.monitoring.v3.Aggregation getAggregations(int index) {
-          if (aggregationsBuilder_ == null) {
-            return aggregations_.get(index);
-          } else {
-            return aggregationsBuilder_.getMessage(index);
-          }
+        if (java.lang.Double.doubleToRawLongBits(thresholdValue_) != 0) {
+          size += com.google.protobuf.CodedOutputStream.computeDoubleSize(5, thresholdValue_);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder setAggregations(int index, com.google.monitoring.v3.Aggregation value) {
-          if (aggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureAggregationsIsMutable();
-            aggregations_.set(index, value);
-            onChanged();
-          } else {
-            aggregationsBuilder_.setMessage(index, value);
-          }
-          return this;
+        if (duration_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(6, getDuration());
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder setAggregations(
-            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.set(index, builderForValue.build());
-            onChanged();
-          } else {
-            aggregationsBuilder_.setMessage(index, builderForValue.build());
-          }
-          return this;
+        if (trigger_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(7, getTrigger());
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder addAggregations(com.google.monitoring.v3.Aggregation value) {
-          if (aggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureAggregationsIsMutable();
-            aggregations_.add(value);
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(value);
-          }
-          return this;
+        for (int i = 0; i < aggregations_.size(); i++) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(8, aggregations_.get(i));
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder addAggregations(int index, com.google.monitoring.v3.Aggregation value) {
-          if (aggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureAggregationsIsMutable();
-            aggregations_.add(index, value);
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(index, value);
-          }
-          return this;
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(denominatorFilter_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(9, denominatorFilter_);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder addAggregations(
-            com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.add(builderForValue.build());
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(builderForValue.build());
-          }
-          return this;
+        for (int i = 0; i < denominatorAggregations_.size(); i++) {
+          size +=
+              com.google.protobuf.CodedOutputStream.computeMessageSize(
+                  10, denominatorAggregations_.get(i));
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder addAggregations(
-            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.add(index, builderForValue.build());
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(index, builderForValue.build());
-          }
-          return this;
+        if (evaluationMissingData_
+            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+                .EVALUATION_MISSING_DATA_UNSPECIFIED
+                .getNumber()) {
+          size += com.google.protobuf.CodedOutputStream.computeEnumSize(11, evaluationMissingData_);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder addAllAggregations(
-            java.lang.Iterable values) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            com.google.protobuf.AbstractMessageLite.Builder.addAll(values, aggregations_);
-            onChanged();
-          } else {
-            aggregationsBuilder_.addAllMessages(values);
-          }
-          return this;
+        if (forecastOptions_ != null) {
+          size +=
+              com.google.protobuf.CodedOutputStream.computeMessageSize(12, getForecastOptions());
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder clearAggregations() {
-          if (aggregationsBuilder_ == null) {
-            aggregations_ = java.util.Collections.emptyList();
-            bitField0_ = (bitField0_ & ~0x00000002);
-            onChanged();
-          } else {
-            aggregationsBuilder_.clear();
-          }
-          return this;
+        size += getUnknownFields().getSerializedSize();
+        memoizedSize = size;
+        return size;
+      }
+
+      @java.lang.Override
+      public boolean equals(final java.lang.Object obj) {
+        if (obj == this) {
+          return true;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public Builder removeAggregations(int index) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.remove(index);
-            onChanged();
-          } else {
-            aggregationsBuilder_.remove(index);
-          }
-          return this;
+        if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)) {
+          return super.equals(obj);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public com.google.monitoring.v3.Aggregation.Builder getAggregationsBuilder(int index) {
-          return getAggregationsFieldBuilder().getBuilder(index);
+        com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold other =
+            (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) obj;
+
+        if (!getFilter().equals(other.getFilter())) return false;
+        if (!getAggregationsList().equals(other.getAggregationsList())) return false;
+        if (!getDenominatorFilter().equals(other.getDenominatorFilter())) return false;
+        if (!getDenominatorAggregationsList().equals(other.getDenominatorAggregationsList()))
+          return false;
+        if (hasForecastOptions() != other.hasForecastOptions()) return false;
+        if (hasForecastOptions()) {
+          if (!getForecastOptions().equals(other.getForecastOptions())) return false;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index) {
-          if (aggregationsBuilder_ == null) {
-            return aggregations_.get(index);
-          } else {
-            return aggregationsBuilder_.getMessageOrBuilder(index);
-          }
+        if (comparison_ != other.comparison_) return false;
+        if (java.lang.Double.doubleToLongBits(getThresholdValue())
+            != java.lang.Double.doubleToLongBits(other.getThresholdValue())) return false;
+        if (hasDuration() != other.hasDuration()) return false;
+        if (hasDuration()) {
+          if (!getDuration().equals(other.getDuration())) return false;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public java.util.List
-            getAggregationsOrBuilderList() {
-          if (aggregationsBuilder_ != null) {
-            return aggregationsBuilder_.getMessageOrBuilderList();
-          } else {
-            return java.util.Collections.unmodifiableList(aggregations_);
-          }
+        if (hasTrigger() != other.hasTrigger()) return false;
+        if (hasTrigger()) {
+          if (!getTrigger().equals(other.getTrigger())) return false;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder() {
-          return getAggregationsFieldBuilder()
-              .addBuilder(com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        if (evaluationMissingData_ != other.evaluationMissingData_) return false;
+        if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        return true;
+      }
+
+      @java.lang.Override
+      public int hashCode() {
+        if (memoizedHashCode != 0) {
+          return memoizedHashCode;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder(int index) {
-          return getAggregationsFieldBuilder()
-              .addBuilder(index, com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        int hash = 41;
+        hash = (19 * hash) + getDescriptor().hashCode();
+        hash = (37 * hash) + FILTER_FIELD_NUMBER;
+        hash = (53 * hash) + getFilter().hashCode();
+        if (getAggregationsCount() > 0) {
+          hash = (37 * hash) + AGGREGATIONS_FIELD_NUMBER;
+          hash = (53 * hash) + getAggregationsList().hashCode();
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
-         */
-        public java.util.List
-            getAggregationsBuilderList() {
-          return getAggregationsFieldBuilder().getBuilderList();
+        hash = (37 * hash) + DENOMINATOR_FILTER_FIELD_NUMBER;
+        hash = (53 * hash) + getDenominatorFilter().hashCode();
+        if (getDenominatorAggregationsCount() > 0) {
+          hash = (37 * hash) + DENOMINATOR_AGGREGATIONS_FIELD_NUMBER;
+          hash = (53 * hash) + getDenominatorAggregationsList().hashCode();
         }
-
-        private com.google.protobuf.RepeatedFieldBuilderV3<
-                com.google.monitoring.v3.Aggregation,
-                com.google.monitoring.v3.Aggregation.Builder,
-                com.google.monitoring.v3.AggregationOrBuilder>
-            getAggregationsFieldBuilder() {
-          if (aggregationsBuilder_ == null) {
-            aggregationsBuilder_ =
-                new com.google.protobuf.RepeatedFieldBuilderV3<
-                    com.google.monitoring.v3.Aggregation,
-                    com.google.monitoring.v3.Aggregation.Builder,
-                    com.google.monitoring.v3.AggregationOrBuilder>(
-                    aggregations_,
-                    ((bitField0_ & 0x00000002) != 0),
-                    getParentForChildren(),
-                    isClean());
-            aggregations_ = null;
-          }
-          return aggregationsBuilder_;
+        if (hasForecastOptions()) {
+          hash = (37 * hash) + FORECAST_OPTIONS_FIELD_NUMBER;
+          hash = (53 * hash) + getForecastOptions().hashCode();
         }
-
-        private java.lang.Object denominatorFilter_ = "";
-        /**
-         *
-         *
-         * 
-         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies a time series that should be used as the denominator of a
-         * ratio that will be compared with the threshold. If a
-         * `denominator_filter` is specified, the time series specified by the
-         * `filter` field will be used as the numerator.
-         *
-         * The filter must specify the metric type and optionally may contain
-         * restrictions on resource type, resource labels, and metric labels.
-         * This field may not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string denominator_filter = 9;
-         *
-         * @return The denominatorFilter.
-         */
-        public java.lang.String getDenominatorFilter() {
-          java.lang.Object ref = denominatorFilter_;
-          if (!(ref instanceof java.lang.String)) {
-            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-            java.lang.String s = bs.toStringUtf8();
-            denominatorFilter_ = s;
-            return s;
-          } else {
-            return (java.lang.String) ref;
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies a time series that should be used as the denominator of a
-         * ratio that will be compared with the threshold. If a
-         * `denominator_filter` is specified, the time series specified by the
-         * `filter` field will be used as the numerator.
-         *
-         * The filter must specify the metric type and optionally may contain
-         * restrictions on resource type, resource labels, and metric labels.
-         * This field may not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string denominator_filter = 9;
-         *
-         * @return The bytes for denominatorFilter.
-         */
-        public com.google.protobuf.ByteString getDenominatorFilterBytes() {
-          java.lang.Object ref = denominatorFilter_;
-          if (ref instanceof String) {
-            com.google.protobuf.ByteString b =
-                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-            denominatorFilter_ = b;
-            return b;
-          } else {
-            return (com.google.protobuf.ByteString) ref;
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies a time series that should be used as the denominator of a
-         * ratio that will be compared with the threshold. If a
-         * `denominator_filter` is specified, the time series specified by the
-         * `filter` field will be used as the numerator.
-         *
-         * The filter must specify the metric type and optionally may contain
-         * restrictions on resource type, resource labels, and metric labels.
-         * This field may not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string denominator_filter = 9;
-         *
-         * @param value The denominatorFilter to set.
-         * @return This builder for chaining.
-         */
-        public Builder setDenominatorFilter(java.lang.String value) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          denominatorFilter_ = value;
-          bitField0_ |= 0x00000004;
-          onChanged();
-          return this;
-        }
-        /**
-         *
-         *
-         * 
-         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies a time series that should be used as the denominator of a
-         * ratio that will be compared with the threshold. If a
-         * `denominator_filter` is specified, the time series specified by the
-         * `filter` field will be used as the numerator.
-         *
-         * The filter must specify the metric type and optionally may contain
-         * restrictions on resource type, resource labels, and metric labels.
-         * This field may not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string denominator_filter = 9;
-         *
-         * @return This builder for chaining.
-         */
-        public Builder clearDenominatorFilter() {
-          denominatorFilter_ = getDefaultInstance().getDenominatorFilter();
-          bitField0_ = (bitField0_ & ~0x00000004);
-          onChanged();
-          return this;
+        hash = (37 * hash) + COMPARISON_FIELD_NUMBER;
+        hash = (53 * hash) + comparison_;
+        hash = (37 * hash) + THRESHOLD_VALUE_FIELD_NUMBER;
+        hash =
+            (53 * hash)
+                + com.google.protobuf.Internal.hashLong(
+                    java.lang.Double.doubleToLongBits(getThresholdValue()));
+        if (hasDuration()) {
+          hash = (37 * hash) + DURATION_FIELD_NUMBER;
+          hash = (53 * hash) + getDuration().hashCode();
         }
-        /**
-         *
-         *
-         * 
-         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies a time series that should be used as the denominator of a
-         * ratio that will be compared with the threshold. If a
-         * `denominator_filter` is specified, the time series specified by the
-         * `filter` field will be used as the numerator.
-         *
-         * The filter must specify the metric type and optionally may contain
-         * restrictions on resource type, resource labels, and metric labels.
-         * This field may not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string denominator_filter = 9;
-         *
-         * @param value The bytes for denominatorFilter to set.
-         * @return This builder for chaining.
-         */
-        public Builder setDenominatorFilterBytes(com.google.protobuf.ByteString value) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          checkByteStringIsUtf8(value);
-          denominatorFilter_ = value;
-          bitField0_ |= 0x00000004;
-          onChanged();
-          return this;
+        if (hasTrigger()) {
+          hash = (37 * hash) + TRIGGER_FIELD_NUMBER;
+          hash = (53 * hash) + getTrigger().hashCode();
         }
+        hash = (37 * hash) + EVALUATION_MISSING_DATA_FIELD_NUMBER;
+        hash = (53 * hash) + evaluationMissingData_;
+        hash = (29 * hash) + getUnknownFields().hashCode();
+        memoizedHashCode = hash;
+        return hash;
+      }
 
-        private java.util.List denominatorAggregations_ =
-            java.util.Collections.emptyList();
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
 
-        private void ensureDenominatorAggregationsIsMutable() {
-          if (!((bitField0_ & 0x00000008) != 0)) {
-            denominatorAggregations_ =
-                new java.util.ArrayList(
-                    denominatorAggregations_);
-            bitField0_ |= 0x00000008;
-          }
-        }
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
 
-        private com.google.protobuf.RepeatedFieldBuilderV3<
-                com.google.monitoring.v3.Aggregation,
-                com.google.monitoring.v3.Aggregation.Builder,
-                com.google.monitoring.v3.AggregationOrBuilder>
-            denominatorAggregationsBuilder_;
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
 
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public java.util.List
-            getDenominatorAggregationsList() {
-          if (denominatorAggregationsBuilder_ == null) {
-            return java.util.Collections.unmodifiableList(denominatorAggregations_);
-          } else {
-            return denominatorAggregationsBuilder_.getMessageList();
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public int getDenominatorAggregationsCount() {
-          if (denominatorAggregationsBuilder_ == null) {
-            return denominatorAggregations_.size();
-          } else {
-            return denominatorAggregationsBuilder_.getCount();
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public com.google.monitoring.v3.Aggregation getDenominatorAggregations(int index) {
-          if (denominatorAggregationsBuilder_ == null) {
-            return denominatorAggregations_.get(index);
-          } else {
-            return denominatorAggregationsBuilder_.getMessage(index);
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder setDenominatorAggregations(
-            int index, com.google.monitoring.v3.Aggregation value) {
-          if (denominatorAggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.set(index, value);
-            onChanged();
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          parseDelimitedFrom(
+              java.io.InputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      @java.lang.Override
+      public Builder newBuilderForType() {
+        return newBuilder();
+      }
+
+      public static Builder newBuilder() {
+        return DEFAULT_INSTANCE.toBuilder();
+      }
+
+      public static Builder newBuilder(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold prototype) {
+        return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+      }
+
+      @java.lang.Override
+      public Builder toBuilder() {
+        return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+      }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition type that compares a collection of time series
+       * against a threshold.
+       * 

+       *
+       * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.MetricThreshold}
+       */
+      public static final class Builder
+          extends com.google.protobuf.GeneratedMessageV3.Builder
+          implements
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_descriptor;
+        }
+
+        @java.lang.Override
+        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.class,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder.class);
+        }
+
+        // Construct using
+        // com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.newBuilder()
+        private Builder() {}
+
+        private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+          super(parent);
+        }
+
+        @java.lang.Override
+        public Builder clear() {
+          super.clear();
+          bitField0_ = 0;
+          filter_ = "";
+          if (aggregationsBuilder_ == null) {
+            aggregations_ = java.util.Collections.emptyList();
           } else {
-            denominatorAggregationsBuilder_.setMessage(index, value);
+            aggregations_ = null;
+            aggregationsBuilder_.clear();
           }
-          return this;
-        }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder setDenominatorAggregations(
-            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          denominatorFilter_ = "";
           if (denominatorAggregationsBuilder_ == null) {
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.set(index, builderForValue.build());
-            onChanged();
+            denominatorAggregations_ = java.util.Collections.emptyList();
           } else {
-            denominatorAggregationsBuilder_.setMessage(index, builderForValue.build());
+            denominatorAggregations_ = null;
+            denominatorAggregationsBuilder_.clear();
+          }
+          bitField0_ = (bitField0_ & ~0x00000008);
+          forecastOptions_ = null;
+          if (forecastOptionsBuilder_ != null) {
+            forecastOptionsBuilder_.dispose();
+            forecastOptionsBuilder_ = null;
+          }
+          comparison_ = 0;
+          thresholdValue_ = 0D;
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
+          }
+          trigger_ = null;
+          if (triggerBuilder_ != null) {
+            triggerBuilder_.dispose();
+            triggerBuilder_ = null;
           }
+          evaluationMissingData_ = 0;
           return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder addDenominatorAggregations(com.google.monitoring.v3.Aggregation value) {
-          if (denominatorAggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.add(value);
-            onChanged();
-          } else {
-            denominatorAggregationsBuilder_.addMessage(value);
+
+        @java.lang.Override
+        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_descriptor;
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+            getDefaultInstanceForType() {
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+              .getDefaultInstance();
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold build() {
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
           }
-          return this;
+          return result;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder addDenominatorAggregations(
-            int index, com.google.monitoring.v3.Aggregation value) {
-          if (denominatorAggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold buildPartial() {
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result =
+              new com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold(this);
+          buildPartialRepeatedFields(result);
+          if (bitField0_ != 0) {
+            buildPartial0(result);
+          }
+          onBuilt();
+          return result;
+        }
+
+        private void buildPartialRepeatedFields(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result) {
+          if (aggregationsBuilder_ == null) {
+            if (((bitField0_ & 0x00000002) != 0)) {
+              aggregations_ = java.util.Collections.unmodifiableList(aggregations_);
+              bitField0_ = (bitField0_ & ~0x00000002);
             }
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.add(index, value);
-            onChanged();
+            result.aggregations_ = aggregations_;
           } else {
-            denominatorAggregationsBuilder_.addMessage(index, value);
+            result.aggregations_ = aggregationsBuilder_.build();
           }
-          return this;
-        }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder addDenominatorAggregations(
-            com.google.monitoring.v3.Aggregation.Builder builderForValue) {
           if (denominatorAggregationsBuilder_ == null) {
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.add(builderForValue.build());
-            onChanged();
+            if (((bitField0_ & 0x00000008) != 0)) {
+              denominatorAggregations_ =
+                  java.util.Collections.unmodifiableList(denominatorAggregations_);
+              bitField0_ = (bitField0_ & ~0x00000008);
+            }
+            result.denominatorAggregations_ = denominatorAggregations_;
           } else {
-            denominatorAggregationsBuilder_.addMessage(builderForValue.build());
+            result.denominatorAggregations_ = denominatorAggregationsBuilder_.build();
           }
-          return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder addDenominatorAggregations(
-            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (denominatorAggregationsBuilder_ == null) {
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.add(index, builderForValue.build());
-            onChanged();
-          } else {
-            denominatorAggregationsBuilder_.addMessage(index, builderForValue.build());
+
+        private void buildPartial0(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold result) {
+          int from_bitField0_ = bitField0_;
+          if (((from_bitField0_ & 0x00000001) != 0)) {
+            result.filter_ = filter_;
+          }
+          if (((from_bitField0_ & 0x00000004) != 0)) {
+            result.denominatorFilter_ = denominatorFilter_;
+          }
+          if (((from_bitField0_ & 0x00000010) != 0)) {
+            result.forecastOptions_ =
+                forecastOptionsBuilder_ == null
+                    ? forecastOptions_
+                    : forecastOptionsBuilder_.build();
+          }
+          if (((from_bitField0_ & 0x00000020) != 0)) {
+            result.comparison_ = comparison_;
+          }
+          if (((from_bitField0_ & 0x00000040) != 0)) {
+            result.thresholdValue_ = thresholdValue_;
+          }
+          if (((from_bitField0_ & 0x00000080) != 0)) {
+            result.duration_ = durationBuilder_ == null ? duration_ : durationBuilder_.build();
+          }
+          if (((from_bitField0_ & 0x00000100) != 0)) {
+            result.trigger_ = triggerBuilder_ == null ? trigger_ : triggerBuilder_.build();
+          }
+          if (((from_bitField0_ & 0x00000200) != 0)) {
+            result.evaluationMissingData_ = evaluationMissingData_;
           }
-          return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder addAllDenominatorAggregations(
-            java.lang.Iterable values) {
-          if (denominatorAggregationsBuilder_ == null) {
-            ensureDenominatorAggregationsIsMutable();
-            com.google.protobuf.AbstractMessageLite.Builder.addAll(
-                values, denominatorAggregations_);
-            onChanged();
+
+        @java.lang.Override
+        public Builder clone() {
+          return super.clone();
+        }
+
+        @java.lang.Override
+        public Builder setField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.setField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+          return super.clearField(field);
+        }
+
+        @java.lang.Override
+        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+          return super.clearOneof(oneof);
+        }
+
+        @java.lang.Override
+        public Builder setRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field,
+            int index,
+            java.lang.Object value) {
+          return super.setRepeatedField(field, index, value);
+        }
+
+        @java.lang.Override
+        public Builder addRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.addRepeatedField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) {
+            return mergeFrom(
+                (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) other);
           } else {
-            denominatorAggregationsBuilder_.addAllMessages(values);
+            super.mergeFrom(other);
+            return this;
           }
-          return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
-         *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
-         */
-        public Builder clearDenominatorAggregations() {
-          if (denominatorAggregationsBuilder_ == null) {
-            denominatorAggregations_ = java.util.Collections.emptyList();
-            bitField0_ = (bitField0_ & ~0x00000008);
+
+        public Builder mergeFrom(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold other) {
+          if (other
+              == com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                  .getDefaultInstance()) return this;
+          if (!other.getFilter().isEmpty()) {
+            filter_ = other.filter_;
+            bitField0_ |= 0x00000001;
             onChanged();
+          }
+          if (aggregationsBuilder_ == null) {
+            if (!other.aggregations_.isEmpty()) {
+              if (aggregations_.isEmpty()) {
+                aggregations_ = other.aggregations_;
+                bitField0_ = (bitField0_ & ~0x00000002);
+              } else {
+                ensureAggregationsIsMutable();
+                aggregations_.addAll(other.aggregations_);
+              }
+              onChanged();
+            }
           } else {
-            denominatorAggregationsBuilder_.clear();
+            if (!other.aggregations_.isEmpty()) {
+              if (aggregationsBuilder_.isEmpty()) {
+                aggregationsBuilder_.dispose();
+                aggregationsBuilder_ = null;
+                aggregations_ = other.aggregations_;
+                bitField0_ = (bitField0_ & ~0x00000002);
+                aggregationsBuilder_ =
+                    com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                        ? getAggregationsFieldBuilder()
+                        : null;
+              } else {
+                aggregationsBuilder_.addAllMessages(other.aggregations_);
+              }
+            }
           }
+          if (!other.getDenominatorFilter().isEmpty()) {
+            denominatorFilter_ = other.denominatorFilter_;
+            bitField0_ |= 0x00000004;
+            onChanged();
+          }
+          if (denominatorAggregationsBuilder_ == null) {
+            if (!other.denominatorAggregations_.isEmpty()) {
+              if (denominatorAggregations_.isEmpty()) {
+                denominatorAggregations_ = other.denominatorAggregations_;
+                bitField0_ = (bitField0_ & ~0x00000008);
+              } else {
+                ensureDenominatorAggregationsIsMutable();
+                denominatorAggregations_.addAll(other.denominatorAggregations_);
+              }
+              onChanged();
+            }
+          } else {
+            if (!other.denominatorAggregations_.isEmpty()) {
+              if (denominatorAggregationsBuilder_.isEmpty()) {
+                denominatorAggregationsBuilder_.dispose();
+                denominatorAggregationsBuilder_ = null;
+                denominatorAggregations_ = other.denominatorAggregations_;
+                bitField0_ = (bitField0_ & ~0x00000008);
+                denominatorAggregationsBuilder_ =
+                    com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                        ? getDenominatorAggregationsFieldBuilder()
+                        : null;
+              } else {
+                denominatorAggregationsBuilder_.addAllMessages(other.denominatorAggregations_);
+              }
+            }
+          }
+          if (other.hasForecastOptions()) {
+            mergeForecastOptions(other.getForecastOptions());
+          }
+          if (other.comparison_ != 0) {
+            setComparisonValue(other.getComparisonValue());
+          }
+          if (other.getThresholdValue() != 0D) {
+            setThresholdValue(other.getThresholdValue());
+          }
+          if (other.hasDuration()) {
+            mergeDuration(other.getDuration());
+          }
+          if (other.hasTrigger()) {
+            mergeTrigger(other.getTrigger());
+          }
+          if (other.evaluationMissingData_ != 0) {
+            setEvaluationMissingDataValue(other.getEvaluationMissingDataValue());
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          onChanged();
+          return this;
+        }
+
+        @java.lang.Override
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          if (extensionRegistry == null) {
+            throw new java.lang.NullPointerException();
+          }
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                case 18:
+                  {
+                    filter_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000001;
+                    break;
+                  } // case 18
+                case 32:
+                  {
+                    comparison_ = input.readEnum();
+                    bitField0_ |= 0x00000020;
+                    break;
+                  } // case 32
+                case 41:
+                  {
+                    thresholdValue_ = input.readDouble();
+                    bitField0_ |= 0x00000040;
+                    break;
+                  } // case 41
+                case 50:
+                  {
+                    input.readMessage(getDurationFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000080;
+                    break;
+                  } // case 50
+                case 58:
+                  {
+                    input.readMessage(getTriggerFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000100;
+                    break;
+                  } // case 58
+                case 66:
+                  {
+                    com.google.monitoring.v3.Aggregation m =
+                        input.readMessage(
+                            com.google.monitoring.v3.Aggregation.parser(), extensionRegistry);
+                    if (aggregationsBuilder_ == null) {
+                      ensureAggregationsIsMutable();
+                      aggregations_.add(m);
+                    } else {
+                      aggregationsBuilder_.addMessage(m);
+                    }
+                    break;
+                  } // case 66
+                case 74:
+                  {
+                    denominatorFilter_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000004;
+                    break;
+                  } // case 74
+                case 82:
+                  {
+                    com.google.monitoring.v3.Aggregation m =
+                        input.readMessage(
+                            com.google.monitoring.v3.Aggregation.parser(), extensionRegistry);
+                    if (denominatorAggregationsBuilder_ == null) {
+                      ensureDenominatorAggregationsIsMutable();
+                      denominatorAggregations_.add(m);
+                    } else {
+                      denominatorAggregationsBuilder_.addMessage(m);
+                    }
+                    break;
+                  } // case 82
+                case 88:
+                  {
+                    evaluationMissingData_ = input.readEnum();
+                    bitField0_ |= 0x00000200;
+                    break;
+                  } // case 88
+                case 98:
+                  {
+                    input.readMessage(
+                        getForecastOptionsFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000010;
+                    break;
+                  } // case 98
+                default:
+                  {
+                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                      done = true; // was an endgroup tag
+                    }
+                    break;
+                  } // default:
+              } // switch (tag)
+            } // while (!done)
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.unwrapIOException();
+          } finally {
+            onChanged();
+          } // finally
           return this;
         }
+
+        private int bitField0_;
+
+        private java.lang.Object filter_ = "";
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return The filter.
          */
-        public Builder removeDenominatorAggregations(int index) {
-          if (denominatorAggregationsBuilder_ == null) {
-            ensureDenominatorAggregationsIsMutable();
-            denominatorAggregations_.remove(index);
-            onChanged();
+        public java.lang.String getFilter() {
+          java.lang.Object ref = filter_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            filter_ = s;
+            return s;
           } else {
-            denominatorAggregationsBuilder_.remove(index);
+            return (java.lang.String) ref;
           }
-          return this;
         }
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return The bytes for filter.
          */
-        public com.google.monitoring.v3.Aggregation.Builder getDenominatorAggregationsBuilder(
-            int index) {
-          return getDenominatorAggregationsFieldBuilder().getBuilder(index);
+        public com.google.protobuf.ByteString getFilterBytes() {
+          java.lang.Object ref = filter_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            filter_ = b;
+            return b;
+          } else {
+            return (com.google.protobuf.ByteString) ref;
+          }
         }
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @param value The filter to set.
+         * @return This builder for chaining.
          */
-        public com.google.monitoring.v3.AggregationOrBuilder getDenominatorAggregationsOrBuilder(
-            int index) {
-          if (denominatorAggregationsBuilder_ == null) {
-            return denominatorAggregations_.get(index);
-          } else {
-            return denominatorAggregationsBuilder_.getMessageOrBuilder(index);
+        public Builder setFilter(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
           }
+          filter_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
         }
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return This builder for chaining.
          */
-        public java.util.List
-            getDenominatorAggregationsOrBuilderList() {
-          if (denominatorAggregationsBuilder_ != null) {
-            return denominatorAggregationsBuilder_.getMessageOrBuilderList();
-          } else {
-            return java.util.Collections.unmodifiableList(denominatorAggregations_);
-          }
+        public Builder clearFilter() {
+          filter_ = getDefaultInstance().getFilter();
+          bitField0_ = (bitField0_ & ~0x00000001);
+          onChanged();
+          return this;
         }
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * string filter = 2 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @param value The bytes for filter to set.
+         * @return This builder for chaining.
          */
-        public com.google.monitoring.v3.Aggregation.Builder addDenominatorAggregationsBuilder() {
-          return getDenominatorAggregationsFieldBuilder()
-              .addBuilder(com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        public Builder setFilterBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          filter_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+
+        private java.util.List aggregations_ =
+            java.util.Collections.emptyList();
+
+        private void ensureAggregationsIsMutable() {
+          if (!((bitField0_ & 0x00000002) != 0)) {
+            aggregations_ =
+                new java.util.ArrayList(aggregations_);
+            bitField0_ |= 0x00000002;
+          }
         }
+
+        private com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.monitoring.v3.Aggregation,
+                com.google.monitoring.v3.Aggregation.Builder,
+                com.google.monitoring.v3.AggregationOrBuilder>
+            aggregationsBuilder_;
+
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
+         * Specifies the alignment of data points in individual time series as
          * well as how to combine the retrieved time series together (such as
          * when aggregating multiple streams on each resource to a single
          * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public com.google.monitoring.v3.Aggregation.Builder addDenominatorAggregationsBuilder(
-            int index) {
-          return getDenominatorAggregationsFieldBuilder()
-              .addBuilder(index, com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        public java.util.List getAggregationsList() {
+          if (aggregationsBuilder_ == null) {
+            return java.util.Collections.unmodifiableList(aggregations_);
+          } else {
+            return aggregationsBuilder_.getMessageList();
+          }
         }
         /**
          *
          *
          * 
-         * Specifies the alignment of data points in individual time series
-         * selected by `denominatorFilter` as
+         * Specifies the alignment of data points in individual time series as
          * well as how to combine the retrieved time series together (such as
          * when aggregating multiple streams on each resource to a single
          * stream for each resource or when aggregating streams across all
-         * members of a group of resources).
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * When computing ratios, the `aggregations` and
-         * `denominator_aggregations` fields must use the same alignment period
-         * and produce time series that have the same periodicity and labels.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public java.util.List
-            getDenominatorAggregationsBuilderList() {
-          return getDenominatorAggregationsFieldBuilder().getBuilderList();
-        }
-
-        private com.google.protobuf.RepeatedFieldBuilderV3<
-                com.google.monitoring.v3.Aggregation,
-                com.google.monitoring.v3.Aggregation.Builder,
-                com.google.monitoring.v3.AggregationOrBuilder>
-            getDenominatorAggregationsFieldBuilder() {
-          if (denominatorAggregationsBuilder_ == null) {
-            denominatorAggregationsBuilder_ =
-                new com.google.protobuf.RepeatedFieldBuilderV3<
-                    com.google.monitoring.v3.Aggregation,
-                    com.google.monitoring.v3.Aggregation.Builder,
-                    com.google.monitoring.v3.AggregationOrBuilder>(
-                    denominatorAggregations_,
-                    ((bitField0_ & 0x00000008) != 0),
-                    getParentForChildren(),
-                    isClean());
-            denominatorAggregations_ = null;
+        public int getAggregationsCount() {
+          if (aggregationsBuilder_ == null) {
+            return aggregations_.size();
+          } else {
+            return aggregationsBuilder_.getCount();
           }
-          return denominatorAggregationsBuilder_;
         }
-
-        private int comparison_ = 0;
         /**
          *
          *
          * 
-         * The comparison to apply between the time series (indicated by `filter`
-         * and `aggregation`) and the threshold (indicated by `threshold_value`).
-         * The comparison is applied on each time series, with the time series
-         * on the left-hand side and the threshold on the right-hand side.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.monitoring.v3.ComparisonType comparison = 4;
-         *
-         * @return The enum numeric value on the wire for comparison.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        @java.lang.Override
-        public int getComparisonValue() {
-          return comparison_;
+        public com.google.monitoring.v3.Aggregation getAggregations(int index) {
+          if (aggregationsBuilder_ == null) {
+            return aggregations_.get(index);
+          } else {
+            return aggregationsBuilder_.getMessage(index);
+          }
         }
         /**
          *
          *
          * 
-         * The comparison to apply between the time series (indicated by `filter`
-         * and `aggregation`) and the threshold (indicated by `threshold_value`).
-         * The comparison is applied on each time series, with the time series
-         * on the left-hand side and the threshold on the right-hand side.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.monitoring.v3.ComparisonType comparison = 4;
-         *
-         * @param value The enum numeric value on the wire for comparison to set.
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder setComparisonValue(int value) {
-          comparison_ = value;
-          bitField0_ |= 0x00000010;
-          onChanged();
+        public Builder setAggregations(int index, com.google.monitoring.v3.Aggregation value) {
+          if (aggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureAggregationsIsMutable();
+            aggregations_.set(index, value);
+            onChanged();
+          } else {
+            aggregationsBuilder_.setMessage(index, value);
+          }
           return this;
         }
         /**
          *
          *
          * 
-         * The comparison to apply between the time series (indicated by `filter`
-         * and `aggregation`) and the threshold (indicated by `threshold_value`).
-         * The comparison is applied on each time series, with the time series
-         * on the left-hand side and the threshold on the right-hand side.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.monitoring.v3.ComparisonType comparison = 4;
-         *
-         * @return The comparison.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        @java.lang.Override
-        public com.google.monitoring.v3.ComparisonType getComparison() {
-          com.google.monitoring.v3.ComparisonType result =
-              com.google.monitoring.v3.ComparisonType.forNumber(comparison_);
-          return result == null ? com.google.monitoring.v3.ComparisonType.UNRECOGNIZED : result;
-        }
-        /**
-         *
+        public Builder setAggregations(
+            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.set(index, builderForValue.build());
+            onChanged();
+          } else {
+            aggregationsBuilder_.setMessage(index, builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         *
          *
          * 
-         * The comparison to apply between the time series (indicated by `filter`
-         * and `aggregation`) and the threshold (indicated by `threshold_value`).
-         * The comparison is applied on each time series, with the time series
-         * on the left-hand side and the threshold on the right-hand side.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.monitoring.v3.ComparisonType comparison = 4;
-         *
-         * @param value The comparison to set.
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder setComparison(com.google.monitoring.v3.ComparisonType value) {
-          if (value == null) {
-            throw new NullPointerException();
+        public Builder addAggregations(com.google.monitoring.v3.Aggregation value) {
+          if (aggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureAggregationsIsMutable();
+            aggregations_.add(value);
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(value);
           }
-          bitField0_ |= 0x00000010;
-          comparison_ = value.getNumber();
-          onChanged();
           return this;
         }
         /**
          *
          *
          * 
-         * The comparison to apply between the time series (indicated by `filter`
-         * and `aggregation`) and the threshold (indicated by `threshold_value`).
-         * The comparison is applied on each time series, with the time series
-         * on the left-hand side and the threshold on the right-hand side.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.monitoring.v3.ComparisonType comparison = 4;
-         *
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder clearComparison() {
-          bitField0_ = (bitField0_ & ~0x00000010);
-          comparison_ = 0;
-          onChanged();
+        public Builder addAggregations(int index, com.google.monitoring.v3.Aggregation value) {
+          if (aggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureAggregationsIsMutable();
+            aggregations_.add(index, value);
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(index, value);
+          }
           return this;
         }
-
-        private double thresholdValue_;
         /**
          *
          *
          * 
-         * A value against which to compare the time series.
-         * 

+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * double threshold_value = 5;
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

          *
-         * @return The thresholdValue.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        @java.lang.Override
-        public double getThresholdValue() {
-          return thresholdValue_;
+        public Builder addAggregations(
+            com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.add(builderForValue.build());
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(builderForValue.build());
+          }
+          return this;
         }
         /**
          *
          *
          * 
-         * A value against which to compare the time series.
-         * 

+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * double threshold_value = 5;
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

          *
-         * @param value The thresholdValue to set.
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder setThresholdValue(double value) {
-
-          thresholdValue_ = value;
-          bitField0_ |= 0x00000020;
-          onChanged();
+        public Builder addAggregations(
+            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.add(index, builderForValue.build());
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(index, builderForValue.build());
+          }
           return this;
         }
         /**
          *
          *
          * 
-         * A value against which to compare the time series.
-         * 

+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * double threshold_value = 5;
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

          *
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder clearThresholdValue() {
-          bitField0_ = (bitField0_ & ~0x00000020);
-          thresholdValue_ = 0D;
-          onChanged();
+        public Builder addAllAggregations(
+            java.lang.Iterable values) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            com.google.protobuf.AbstractMessageLite.Builder.addAll(values, aggregations_);
+            onChanged();
+          } else {
+            aggregationsBuilder_.addAllMessages(values);
+          }
           return this;
         }
-
-        private com.google.protobuf.Duration duration_;
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.protobuf.Duration,
-                com.google.protobuf.Duration.Builder,
-                com.google.protobuf.DurationOrBuilder>
-            durationBuilder_;
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
-         * 

+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * .google.protobuf.Duration duration = 6;
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

          *
-         * @return Whether the duration field is set.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public boolean hasDuration() {
-          return ((bitField0_ & 0x00000040) != 0);
+        public Builder clearAggregations() {
+          if (aggregationsBuilder_ == null) {
+            aggregations_ = java.util.Collections.emptyList();
+            bitField0_ = (bitField0_ & ~0x00000002);
+            onChanged();
+          } else {
+            aggregationsBuilder_.clear();
+          }
+          return this;
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
-         * 

+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
          *
-         * .google.protobuf.Duration duration = 6;
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

          *
-         * @return The duration.
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public com.google.protobuf.Duration getDuration() {
-          if (durationBuilder_ == null) {
-            return duration_ == null
-                ? com.google.protobuf.Duration.getDefaultInstance()
-                : duration_;
+        public Builder removeAggregations(int index) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.remove(index);
+            onChanged();
           } else {
-            return durationBuilder_.getMessage();
+            aggregationsBuilder_.remove(index);
           }
+          return this;
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder setDuration(com.google.protobuf.Duration value) {
-          if (durationBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            duration_ = value;
-          } else {
-            durationBuilder_.setMessage(value);
-          }
-          bitField0_ |= 0x00000040;
-          onChanged();
-          return this;
+        public com.google.monitoring.v3.Aggregation.Builder getAggregationsBuilder(int index) {
+          return getAggregationsFieldBuilder().getBuilder(index);
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
-          if (durationBuilder_ == null) {
-            duration_ = builderForValue.build();
+        public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index) {
+          if (aggregationsBuilder_ == null) {
+            return aggregations_.get(index);
           } else {
-            durationBuilder_.setMessage(builderForValue.build());
+            return aggregationsBuilder_.getMessageOrBuilder(index);
           }
-          bitField0_ |= 0x00000040;
-          onChanged();
-          return this;
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder mergeDuration(com.google.protobuf.Duration value) {
-          if (durationBuilder_ == null) {
-            if (((bitField0_ & 0x00000040) != 0)
-                && duration_ != null
-                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
-              getDurationBuilder().mergeFrom(value);
-            } else {
-              duration_ = value;
-            }
+        public java.util.List
+            getAggregationsOrBuilderList() {
+          if (aggregationsBuilder_ != null) {
+            return aggregationsBuilder_.getMessageOrBuilderList();
           } else {
-            durationBuilder_.mergeFrom(value);
+            return java.util.Collections.unmodifiableList(aggregations_);
           }
-          bitField0_ |= 0x00000040;
-          onChanged();
-          return this;
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public Builder clearDuration() {
-          bitField0_ = (bitField0_ & ~0x00000040);
-          duration_ = null;
-          if (durationBuilder_ != null) {
-            durationBuilder_.dispose();
-            durationBuilder_ = null;
-          }
-          onChanged();
-          return this;
+        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder() {
+          return getAggregationsFieldBuilder()
+              .addBuilder(com.google.monitoring.v3.Aggregation.getDefaultInstance());
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public com.google.protobuf.Duration.Builder getDurationBuilder() {
-          bitField0_ |= 0x00000040;
-          onChanged();
-          return getDurationFieldBuilder().getBuilder();
+        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder(int index) {
+          return getAggregationsFieldBuilder()
+              .addBuilder(index, com.google.monitoring.v3.Aggregation.getDefaultInstance());
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * repeated .google.monitoring.v3.Aggregation aggregations = 8;
          */
-        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
-          if (durationBuilder_ != null) {
-            return durationBuilder_.getMessageOrBuilder();
-          } else {
-            return duration_ == null
-                ? com.google.protobuf.Duration.getDefaultInstance()
-                : duration_;
+        public java.util.List
+            getAggregationsBuilderList() {
+          return getAggregationsFieldBuilder().getBuilderList();
+        }
+
+        private com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.monitoring.v3.Aggregation,
+                com.google.monitoring.v3.Aggregation.Builder,
+                com.google.monitoring.v3.AggregationOrBuilder>
+            getAggregationsFieldBuilder() {
+          if (aggregationsBuilder_ == null) {
+            aggregationsBuilder_ =
+                new com.google.protobuf.RepeatedFieldBuilderV3<
+                    com.google.monitoring.v3.Aggregation,
+                    com.google.monitoring.v3.Aggregation.Builder,
+                    com.google.monitoring.v3.AggregationOrBuilder>(
+                    aggregations_,
+                    ((bitField0_ & 0x00000002) != 0),
+                    getParentForChildren(),
+                    isClean());
+            aggregations_ = null;
           }
+          return aggregationsBuilder_;
         }
+
+        private java.lang.Object denominatorFilter_ = "";
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies a time series that should be used as the denominator of a
+         * ratio that will be compared with the threshold. If a
+         * `denominator_filter` is specified, the time series specified by the
+         * `filter` field will be used as the numerator.
+         *
+         * The filter must specify the metric type and optionally may contain
+         * restrictions on resource type, resource labels, and metric labels.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.protobuf.Duration duration = 6;
+         * string denominator_filter = 9;
+         *
+         * @return The denominatorFilter.
          */
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.protobuf.Duration,
-                com.google.protobuf.Duration.Builder,
-                com.google.protobuf.DurationOrBuilder>
-            getDurationFieldBuilder() {
-          if (durationBuilder_ == null) {
-            durationBuilder_ =
-                new com.google.protobuf.SingleFieldBuilderV3<
-                    com.google.protobuf.Duration,
-                    com.google.protobuf.Duration.Builder,
-                    com.google.protobuf.DurationOrBuilder>(
-                    getDuration(), getParentForChildren(), isClean());
-            duration_ = null;
+        public java.lang.String getDenominatorFilter() {
+          java.lang.Object ref = denominatorFilter_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            denominatorFilter_ = s;
+            return s;
+          } else {
+            return (java.lang.String) ref;
           }
-          return durationBuilder_;
         }
-
-        private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
-            triggerBuilder_;
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies a time series that should be used as the denominator of a
+         * ratio that will be compared with the threshold. If a
+         * `denominator_filter` is specified, the time series specified by the
+         * `filter` field will be used as the numerator.
+         *
+         * The filter must specify the metric type and optionally may contain
+         * restrictions on resource type, resource labels, and metric labels.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * string denominator_filter = 9;
          *
-         * @return Whether the trigger field is set.
+         * @return The bytes for denominatorFilter.
          */
-        public boolean hasTrigger() {
-          return ((bitField0_ & 0x00000080) != 0);
+        public com.google.protobuf.ByteString getDenominatorFilterBytes() {
+          java.lang.Object ref = denominatorFilter_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            denominatorFilter_ = b;
+            return b;
+          } else {
+            return (com.google.protobuf.ByteString) ref;
+          }
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies a time series that should be used as the denominator of a
+         * ratio that will be compared with the threshold. If a
+         * `denominator_filter` is specified, the time series specified by the
+         * `filter` field will be used as the numerator.
+         *
+         * The filter must specify the metric type and optionally may contain
+         * restrictions on resource type, resource labels, and metric labels.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * string denominator_filter = 9;
          *
-         * @return The trigger.
+         * @param value The denominatorFilter to set.
+         * @return This builder for chaining.
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
-          if (triggerBuilder_ == null) {
-            return trigger_ == null
-                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-                : trigger_;
-          } else {
-            return triggerBuilder_.getMessage();
+        public Builder setDenominatorFilter(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
           }
+          denominatorFilter_ = value;
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies a time series that should be used as the denominator of a
+         * ratio that will be compared with the threshold. If a
+         * `denominator_filter` is specified, the time series specified by the
+         * `filter` field will be used as the numerator.
+         *
+         * The filter must specify the metric type and optionally may contain
+         * restrictions on resource type, resource labels, and metric labels.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * string denominator_filter = 9;
+         *
+         * @return This builder for chaining.
          */
-        public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
-          if (triggerBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            trigger_ = value;
-          } else {
-            triggerBuilder_.setMessage(value);
-          }
-          bitField0_ |= 0x00000080;
+        public Builder clearDenominatorFilter() {
+          denominatorFilter_ = getDefaultInstance().getDenominatorFilter();
+          bitField0_ = (bitField0_ & ~0x00000004);
           onChanged();
           return this;
         }
@@ -6226,791 +6565,2116 @@ public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies a time series that should be used as the denominator of a
+         * ratio that will be compared with the threshold. If a
+         * `denominator_filter` is specified, the time series specified by the
+         * `filter` field will be used as the numerator.
+         *
+         * The filter must specify the metric type and optionally may contain
+         * restrictions on resource type, resource labels, and metric labels.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * string denominator_filter = 9;
+         *
+         * @param value The bytes for denominatorFilter to set.
+         * @return This builder for chaining.
          */
-        public Builder setTrigger(
-            com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder builderForValue) {
-          if (triggerBuilder_ == null) {
-            trigger_ = builderForValue.build();
-          } else {
-            triggerBuilder_.setMessage(builderForValue.build());
+        public Builder setDenominatorFilterBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
           }
-          bitField0_ |= 0x00000080;
+          checkByteStringIsUtf8(value);
+          denominatorFilter_ = value;
+          bitField0_ |= 0x00000004;
           onChanged();
           return this;
         }
+
+        private java.util.List denominatorAggregations_ =
+            java.util.Collections.emptyList();
+
+        private void ensureDenominatorAggregationsIsMutable() {
+          if (!((bitField0_ & 0x00000008) != 0)) {
+            denominatorAggregations_ =
+                new java.util.ArrayList(
+                    denominatorAggregations_);
+            bitField0_ |= 0x00000008;
+          }
+        }
+
+        private com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.monitoring.v3.Aggregation,
+                com.google.monitoring.v3.Aggregation.Builder,
+                com.google.monitoring.v3.AggregationOrBuilder>
+            denominatorAggregationsBuilder_;
+
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public Builder mergeTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
-          if (triggerBuilder_ == null) {
-            if (((bitField0_ & 0x00000080) != 0)
-                && trigger_ != null
-                && trigger_
-                    != com.google.monitoring.v3.AlertPolicy.Condition.Trigger
-                        .getDefaultInstance()) {
-              getTriggerBuilder().mergeFrom(value);
-            } else {
-              trigger_ = value;
-            }
+        public java.util.List
+            getDenominatorAggregationsList() {
+          if (denominatorAggregationsBuilder_ == null) {
+            return java.util.Collections.unmodifiableList(denominatorAggregations_);
           } else {
-            triggerBuilder_.mergeFrom(value);
+            return denominatorAggregationsBuilder_.getMessageList();
           }
-          bitField0_ |= 0x00000080;
-          onChanged();
-          return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public Builder clearTrigger() {
-          bitField0_ = (bitField0_ & ~0x00000080);
-          trigger_ = null;
-          if (triggerBuilder_ != null) {
-            triggerBuilder_.dispose();
-            triggerBuilder_ = null;
+        public int getDenominatorAggregationsCount() {
+          if (denominatorAggregationsBuilder_ == null) {
+            return denominatorAggregations_.size();
+          } else {
+            return denominatorAggregationsBuilder_.getCount();
           }
-          onChanged();
-          return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
-         * 

+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder getTriggerBuilder() {
-          bitField0_ |= 0x00000080;
-          onChanged();
-          return getTriggerFieldBuilder().getBuilder();
+        public com.google.monitoring.v3.Aggregation getDenominatorAggregations(int index) {
+          if (denominatorAggregationsBuilder_ == null) {
+            return denominatorAggregations_.get(index);
+          } else {
+            return denominatorAggregationsBuilder_.getMessage(index);
+          }
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder
-            getTriggerOrBuilder() {
-          if (triggerBuilder_ != null) {
-            return triggerBuilder_.getMessageOrBuilder();
+        public Builder setDenominatorAggregations(
+            int index, com.google.monitoring.v3.Aggregation value) {
+          if (denominatorAggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.set(index, value);
+            onChanged();
           } else {
-            return trigger_ == null
-                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-                : trigger_;
+            denominatorAggregationsBuilder_.setMessage(index, value);
           }
+          return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
-            getTriggerFieldBuilder() {
-          if (triggerBuilder_ == null) {
-            triggerBuilder_ =
-                new com.google.protobuf.SingleFieldBuilderV3<
-                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                    com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>(
-                    getTrigger(), getParentForChildren(), isClean());
-            trigger_ = null;
+        public Builder setDenominatorAggregations(
+            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (denominatorAggregationsBuilder_ == null) {
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.set(index, builderForValue.build());
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.setMessage(index, builderForValue.build());
           }
-          return triggerBuilder_;
+          return this;
         }
-
-        private int evaluationMissingData_ = 0;
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
-         * 

+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-         * 
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

          *
-         * @return The enum numeric value on the wire for evaluationMissingData.
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        @java.lang.Override
-        public int getEvaluationMissingDataValue() {
-          return evaluationMissingData_;
+        public Builder addDenominatorAggregations(com.google.monitoring.v3.Aggregation value) {
+          if (denominatorAggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.add(value);
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.addMessage(value);
+          }
+          return this;
         }
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
-         * 

+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-         * 
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

          *
-         * @param value The enum numeric value on the wire for evaluationMissingData to set.
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public Builder setEvaluationMissingDataValue(int value) {
-          evaluationMissingData_ = value;
-          bitField0_ |= 0x00000100;
-          onChanged();
+        public Builder addDenominatorAggregations(
+            int index, com.google.monitoring.v3.Aggregation value) {
+          if (denominatorAggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.add(index, value);
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.addMessage(index, value);
+          }
           return this;
         }
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
-         * 

+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-         * 
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

          *
-         * @return The evaluationMissingData.
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-            getEvaluationMissingData() {
-          com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
-              com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
-                  evaluationMissingData_);
-          return result == null
-              ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
-              : result;
+        public Builder addDenominatorAggregations(
+            com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (denominatorAggregationsBuilder_ == null) {
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.add(builderForValue.build());
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.addMessage(builderForValue.build());
+          }
+          return this;
         }
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
-         * 

+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-         * 
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

          *
-         * @param value The evaluationMissingData to set.
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public Builder setEvaluationMissingData(
-            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData value) {
-          if (value == null) {
-            throw new NullPointerException();
+        public Builder addDenominatorAggregations(
+            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (denominatorAggregationsBuilder_ == null) {
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.add(index, builderForValue.build());
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.addMessage(index, builderForValue.build());
           }
-          bitField0_ |= 0x00000100;
-          evaluationMissingData_ = value.getNumber();
-          onChanged();
           return this;
         }
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
-         * 

+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
-         * 
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

          *
-         * @return This builder for chaining.
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
          */
-        public Builder clearEvaluationMissingData() {
-          bitField0_ = (bitField0_ & ~0x00000100);
-          evaluationMissingData_ = 0;
-          onChanged();
+        public Builder addAllDenominatorAggregations(
+            java.lang.Iterable values) {
+          if (denominatorAggregationsBuilder_ == null) {
+            ensureDenominatorAggregationsIsMutable();
+            com.google.protobuf.AbstractMessageLite.Builder.addAll(
+                values, denominatorAggregations_);
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.addAllMessages(values);
+          }
           return this;
         }
-
-        @java.lang.Override
-        public final Builder setUnknownFields(
-            final com.google.protobuf.UnknownFieldSet unknownFields) {
-          return super.setUnknownFields(unknownFields);
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public Builder clearDenominatorAggregations() {
+          if (denominatorAggregationsBuilder_ == null) {
+            denominatorAggregations_ = java.util.Collections.emptyList();
+            bitField0_ = (bitField0_ & ~0x00000008);
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.clear();
+          }
+          return this;
         }
-
-        @java.lang.Override
-        public final Builder mergeUnknownFields(
-            final com.google.protobuf.UnknownFieldSet unknownFields) {
-          return super.mergeUnknownFields(unknownFields);
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public Builder removeDenominatorAggregations(int index) {
+          if (denominatorAggregationsBuilder_ == null) {
+            ensureDenominatorAggregationsIsMutable();
+            denominatorAggregations_.remove(index);
+            onChanged();
+          } else {
+            denominatorAggregationsBuilder_.remove(index);
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public com.google.monitoring.v3.Aggregation.Builder getDenominatorAggregationsBuilder(
+            int index) {
+          return getDenominatorAggregationsFieldBuilder().getBuilder(index);
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public com.google.monitoring.v3.AggregationOrBuilder getDenominatorAggregationsOrBuilder(
+            int index) {
+          if (denominatorAggregationsBuilder_ == null) {
+            return denominatorAggregations_.get(index);
+          } else {
+            return denominatorAggregationsBuilder_.getMessageOrBuilder(index);
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public java.util.List
+            getDenominatorAggregationsOrBuilderList() {
+          if (denominatorAggregationsBuilder_ != null) {
+            return denominatorAggregationsBuilder_.getMessageOrBuilderList();
+          } else {
+            return java.util.Collections.unmodifiableList(denominatorAggregations_);
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public com.google.monitoring.v3.Aggregation.Builder addDenominatorAggregationsBuilder() {
+          return getDenominatorAggregationsFieldBuilder()
+              .addBuilder(com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public com.google.monitoring.v3.Aggregation.Builder addDenominatorAggregationsBuilder(
+            int index) {
+          return getDenominatorAggregationsFieldBuilder()
+              .addBuilder(index, com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series
+         * selected by `denominatorFilter` as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources).
+         *
+         * When computing ratios, the `aggregations` and
+         * `denominator_aggregations` fields must use the same alignment period
+         * and produce time series that have the same periodicity and labels.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation denominator_aggregations = 10;
+         */
+        public java.util.List
+            getDenominatorAggregationsBuilderList() {
+          return getDenominatorAggregationsFieldBuilder().getBuilderList();
         }
 
-        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)
-      }
-
-      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)
-      private static final com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-          DEFAULT_INSTANCE;
-
-      static {
-        DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold();
-      }
-
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-          getDefaultInstance() {
-        return DEFAULT_INSTANCE;
-      }
+        private com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.monitoring.v3.Aggregation,
+                com.google.monitoring.v3.Aggregation.Builder,
+                com.google.monitoring.v3.AggregationOrBuilder>
+            getDenominatorAggregationsFieldBuilder() {
+          if (denominatorAggregationsBuilder_ == null) {
+            denominatorAggregationsBuilder_ =
+                new com.google.protobuf.RepeatedFieldBuilderV3<
+                    com.google.monitoring.v3.Aggregation,
+                    com.google.monitoring.v3.Aggregation.Builder,
+                    com.google.monitoring.v3.AggregationOrBuilder>(
+                    denominatorAggregations_,
+                    ((bitField0_ & 0x00000008) != 0),
+                    getParentForChildren(),
+                    isClean());
+            denominatorAggregations_ = null;
+          }
+          return denominatorAggregationsBuilder_;
+        }
 
-      private static final com.google.protobuf.Parser PARSER =
-          new com.google.protobuf.AbstractParser() {
-            @java.lang.Override
-            public MetricThreshold parsePartialFrom(
-                com.google.protobuf.CodedInputStream input,
-                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-                throws com.google.protobuf.InvalidProtocolBufferException {
-              Builder builder = newBuilder();
-              try {
-                builder.mergeFrom(input, extensionRegistry);
-              } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-                throw e.setUnfinishedMessage(builder.buildPartial());
-              } catch (com.google.protobuf.UninitializedMessageException e) {
-                throw e.asInvalidProtocolBufferException()
-                    .setUnfinishedMessage(builder.buildPartial());
-              } catch (java.io.IOException e) {
-                throw new com.google.protobuf.InvalidProtocolBufferException(e)
-                    .setUnfinishedMessage(builder.buildPartial());
-              }
-              return builder.buildPartial();
+        private com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            forecastOptions_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions,
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                    .Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                    .ForecastOptionsOrBuilder>
+            forecastOptionsBuilder_;
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         *
+         * @return Whether the forecastOptions field is set.
+         */
+        public boolean hasForecastOptions() {
+          return ((bitField0_ & 0x00000010) != 0);
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         *
+         * @return The forecastOptions.
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+            getForecastOptions() {
+          if (forecastOptionsBuilder_ == null) {
+            return forecastOptions_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                    .getDefaultInstance()
+                : forecastOptions_;
+          } else {
+            return forecastOptionsBuilder_.getMessage();
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        public Builder setForecastOptions(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions value) {
+          if (forecastOptionsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
             }
-          };
-
-      public static com.google.protobuf.Parser parser() {
-        return PARSER;
-      }
-
-      @java.lang.Override
-      public com.google.protobuf.Parser getParserForType() {
-        return PARSER;
-      }
-
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-          getDefaultInstanceForType() {
-        return DEFAULT_INSTANCE;
-      }
-    }
-
-    public interface MetricAbsenceOrBuilder
-        extends
-        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
-        com.google.protobuf.MessageOrBuilder {
-
-      /**
-       *
-       *
-       * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies which time series should be compared with the threshold.
-       *
-       * The filter is similar to the one that is specified in the
-       * [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-       * (that call is useful to verify the time series that will be retrieved /
-       * processed). The filter must specify the metric type and the resource
-       * type. Optionally, it can specify resource labels and metric labels.
-       * This field must not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-       *
-       * @return The filter.
-       */
-      java.lang.String getFilter();
-      /**
-       *
-       *
-       * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies which time series should be compared with the threshold.
-       *
-       * The filter is similar to the one that is specified in the
-       * [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-       * (that call is useful to verify the time series that will be retrieved /
-       * processed). The filter must specify the metric type and the resource
-       * type. Optionally, it can specify resource labels and metric labels.
-       * This field must not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-       *
-       * @return The bytes for filter.
-       */
-      com.google.protobuf.ByteString getFilterBytes();
+            forecastOptions_ = value;
+          } else {
+            forecastOptionsBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000010;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        public Builder setForecastOptions(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions.Builder
+                builderForValue) {
+          if (forecastOptionsBuilder_ == null) {
+            forecastOptions_ = builderForValue.build();
+          } else {
+            forecastOptionsBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000010;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        public Builder mergeForecastOptions(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions value) {
+          if (forecastOptionsBuilder_ == null) {
+            if (((bitField0_ & 0x00000010) != 0)
+                && forecastOptions_ != null
+                && forecastOptions_
+                    != com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                        .ForecastOptions.getDefaultInstance()) {
+              getForecastOptionsBuilder().mergeFrom(value);
+            } else {
+              forecastOptions_ = value;
+            }
+          } else {
+            forecastOptionsBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000010;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        public Builder clearForecastOptions() {
+          bitField0_ = (bitField0_ & ~0x00000010);
+          forecastOptions_ = null;
+          if (forecastOptionsBuilder_ != null) {
+            forecastOptionsBuilder_.dispose();
+            forecastOptionsBuilder_ = null;
+          }
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                .Builder
+            getForecastOptionsBuilder() {
+          bitField0_ |= 0x00000010;
+          onChanged();
+          return getForecastOptionsFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                .ForecastOptionsOrBuilder
+            getForecastOptionsOrBuilder() {
+          if (forecastOptionsBuilder_ != null) {
+            return forecastOptionsBuilder_.getMessageOrBuilder();
+          } else {
+            return forecastOptions_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                    .getDefaultInstance()
+                : forecastOptions_;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * When this field is present, the `MetricThreshold` condition forecasts
+         * whether the time series is predicted to violate the threshold within
+         * the `forecast_horizon`. When this field is not set, the
+         * `MetricThreshold` tests the current value of the timeseries against the
+         * threshold.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions forecast_options = 12;
+         * 
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions,
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                    .Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                    .ForecastOptionsOrBuilder>
+            getForecastOptionsFieldBuilder() {
+          if (forecastOptionsBuilder_ == null) {
+            forecastOptionsBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions,
+                    com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.ForecastOptions
+                        .Builder,
+                    com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                        .ForecastOptionsOrBuilder>(
+                    getForecastOptions(), getParentForChildren(), isClean());
+            forecastOptions_ = null;
+          }
+          return forecastOptionsBuilder_;
+        }
 
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      java.util.List getAggregationsList();
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      com.google.monitoring.v3.Aggregation getAggregations(int index);
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      int getAggregationsCount();
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      java.util.List
-          getAggregationsOrBuilderList();
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index);
+        private int comparison_ = 0;
+        /**
+         *
+         *
+         * 
+         * The comparison to apply between the time series (indicated by `filter`
+         * and `aggregation`) and the threshold (indicated by `threshold_value`).
+         * The comparison is applied on each time series, with the time series
+         * on the left-hand side and the threshold on the right-hand side.
+         *
+         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * 

+         *
+         * .google.monitoring.v3.ComparisonType comparison = 4;
+         *
+         * @return The enum numeric value on the wire for comparison.
+         */
+        @java.lang.Override
+        public int getComparisonValue() {
+          return comparison_;
+        }
+        /**
+         *
+         *
+         * 
+         * The comparison to apply between the time series (indicated by `filter`
+         * and `aggregation`) and the threshold (indicated by `threshold_value`).
+         * The comparison is applied on each time series, with the time series
+         * on the left-hand side and the threshold on the right-hand side.
+         *
+         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * 

+         *
+         * .google.monitoring.v3.ComparisonType comparison = 4;
+         *
+         * @param value The enum numeric value on the wire for comparison to set.
+         * @return This builder for chaining.
+         */
+        public Builder setComparisonValue(int value) {
+          comparison_ = value;
+          bitField0_ |= 0x00000020;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The comparison to apply between the time series (indicated by `filter`
+         * and `aggregation`) and the threshold (indicated by `threshold_value`).
+         * The comparison is applied on each time series, with the time series
+         * on the left-hand side and the threshold on the right-hand side.
+         *
+         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * 

+         *
+         * .google.monitoring.v3.ComparisonType comparison = 4;
+         *
+         * @return The comparison.
+         */
+        @java.lang.Override
+        public com.google.monitoring.v3.ComparisonType getComparison() {
+          com.google.monitoring.v3.ComparisonType result =
+              com.google.monitoring.v3.ComparisonType.forNumber(comparison_);
+          return result == null ? com.google.monitoring.v3.ComparisonType.UNRECOGNIZED : result;
+        }
+        /**
+         *
+         *
+         * 
+         * The comparison to apply between the time series (indicated by `filter`
+         * and `aggregation`) and the threshold (indicated by `threshold_value`).
+         * The comparison is applied on each time series, with the time series
+         * on the left-hand side and the threshold on the right-hand side.
+         *
+         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * 

+         *
+         * .google.monitoring.v3.ComparisonType comparison = 4;
+         *
+         * @param value The comparison to set.
+         * @return This builder for chaining.
+         */
+        public Builder setComparison(com.google.monitoring.v3.ComparisonType value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          bitField0_ |= 0x00000020;
+          comparison_ = value.getNumber();
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The comparison to apply between the time series (indicated by `filter`
+         * and `aggregation`) and the threshold (indicated by `threshold_value`).
+         * The comparison is applied on each time series, with the time series
+         * on the left-hand side and the threshold on the right-hand side.
+         *
+         * Only `COMPARISON_LT` and `COMPARISON_GT` are supported currently.
+         * 

+         *
+         * .google.monitoring.v3.ComparisonType comparison = 4;
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearComparison() {
+          bitField0_ = (bitField0_ & ~0x00000020);
+          comparison_ = 0;
+          onChanged();
+          return this;
+        }
 
-      /**
-       *
-       *
-       * 
-       * The amount of time that a time series must fail to report new
-       * data to be considered failing. The minimum value of this field
-       * is 120 seconds. Larger values that are a multiple of a
-       * minute--for example, 240 or 300 seconds--are supported.
-       * If an invalid value is given, an
-       * error will be returned. The `Duration.nanos` field is
-       * ignored.
-       * 

-       *
-       * .google.protobuf.Duration duration = 2;
-       *
-       * @return Whether the duration field is set.
-       */
-      boolean hasDuration();
-      /**
-       *
-       *
-       * 
-       * The amount of time that a time series must fail to report new
-       * data to be considered failing. The minimum value of this field
-       * is 120 seconds. Larger values that are a multiple of a
-       * minute--for example, 240 or 300 seconds--are supported.
-       * If an invalid value is given, an
-       * error will be returned. The `Duration.nanos` field is
-       * ignored.
-       * 

-       *
-       * .google.protobuf.Duration duration = 2;
-       *
-       * @return The duration.
-       */
-      com.google.protobuf.Duration getDuration();
-      /**
-       *
-       *
-       * 
-       * The amount of time that a time series must fail to report new
-       * data to be considered failing. The minimum value of this field
-       * is 120 seconds. Larger values that are a multiple of a
-       * minute--for example, 240 or 300 seconds--are supported.
-       * If an invalid value is given, an
-       * error will be returned. The `Duration.nanos` field is
-       * ignored.
-       * 

-       *
-       * .google.protobuf.Duration duration = 2;
-       */
-      com.google.protobuf.DurationOrBuilder getDurationOrBuilder();
+        private double thresholdValue_;
+        /**
+         *
+         *
+         * 
+         * A value against which to compare the time series.
+         * 

+         *
+         * double threshold_value = 5;
+         *
+         * @return The thresholdValue.
+         */
+        @java.lang.Override
+        public double getThresholdValue() {
+          return thresholdValue_;
+        }
+        /**
+         *
+         *
+         * 
+         * A value against which to compare the time series.
+         * 

+         *
+         * double threshold_value = 5;
+         *
+         * @param value The thresholdValue to set.
+         * @return This builder for chaining.
+         */
+        public Builder setThresholdValue(double value) {
 
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       *
-       * @return Whether the trigger field is set.
-       */
-      boolean hasTrigger();
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       *
-       * @return The trigger.
-       */
-      com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger();
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       */
-      com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder();
-    }
-    /**
-     *
-     *
-     * 
-     * A condition type that checks that monitored resources
-     * are reporting data. The configuration defines a metric and
-     * a set of monitored resources. The predicate is considered in violation
-     * when a time series for the specified metric of a monitored
-     * resource does not include any data in the specified `duration`.
-     * 

-     *
-     * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.MetricAbsence}
-     */
-    public static final class MetricAbsence extends com.google.protobuf.GeneratedMessageV3
-        implements
-        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
-        MetricAbsenceOrBuilder {
-      private static final long serialVersionUID = 0L;
-      // Use MetricAbsence.newBuilder() to construct.
-      private MetricAbsence(com.google.protobuf.GeneratedMessageV3.Builder builder) {
-        super(builder);
-      }
-
-      private MetricAbsence() {
-        filter_ = "";
-        aggregations_ = java.util.Collections.emptyList();
-      }
-
-      @java.lang.Override
-      @SuppressWarnings({"unused"})
-      protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
-        return new MetricAbsence();
-      }
-
-      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor;
-      }
-
-      @java.lang.Override
-      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-          internalGetFieldAccessorTable() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_fieldAccessorTable
-            .ensureFieldAccessorsInitialized(
-                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.class,
-                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder.class);
-      }
-
-      public static final int FILTER_FIELD_NUMBER = 1;
-
-      @SuppressWarnings("serial")
-      private volatile java.lang.Object filter_ = "";
-      /**
-       *
-       *
-       * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies which time series should be compared with the threshold.
-       *
-       * The filter is similar to the one that is specified in the
-       * [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-       * (that call is useful to verify the time series that will be retrieved /
-       * processed). The filter must specify the metric type and the resource
-       * type. Optionally, it can specify resource labels and metric labels.
-       * This field must not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-       *
-       * @return The filter.
-       */
-      @java.lang.Override
-      public java.lang.String getFilter() {
-        java.lang.Object ref = filter_;
-        if (ref instanceof java.lang.String) {
-          return (java.lang.String) ref;
-        } else {
-          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          filter_ = s;
-          return s;
+          thresholdValue_ = value;
+          bitField0_ |= 0x00000040;
+          onChanged();
+          return this;
         }
-      }
-      /**
-       *
-       *
-       * 
-       * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-       * identifies which time series should be compared with the threshold.
-       *
-       * The filter is similar to the one that is specified in the
-       * [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-       * (that call is useful to verify the time series that will be retrieved /
-       * processed). The filter must specify the metric type and the resource
-       * type. Optionally, it can specify resource labels and metric labels.
-       * This field must not exceed 2048 Unicode characters in length.
-       * 

-       *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-       *
-       * @return The bytes for filter.
-       */
-      @java.lang.Override
-      public com.google.protobuf.ByteString getFilterBytes() {
-        java.lang.Object ref = filter_;
-        if (ref instanceof java.lang.String) {
-          com.google.protobuf.ByteString b =
-              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-          filter_ = b;
-          return b;
-        } else {
-          return (com.google.protobuf.ByteString) ref;
+        /**
+         *
+         *
+         * 
+         * A value against which to compare the time series.
+         * 

+         *
+         * double threshold_value = 5;
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearThresholdValue() {
+          bitField0_ = (bitField0_ & ~0x00000040);
+          thresholdValue_ = 0D;
+          onChanged();
+          return this;
         }
-      }
 
-      public static final int AGGREGATIONS_FIELD_NUMBER = 5;
-
-      @SuppressWarnings("serial")
-      private java.util.List aggregations_;
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      @java.lang.Override
-      public java.util.List getAggregationsList() {
-        return aggregations_;
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      @java.lang.Override
-      public java.util.List
-          getAggregationsOrBuilderList() {
-        return aggregations_;
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-       */
-      @java.lang.Override
-      public int getAggregationsCount() {
-        return aggregations_.size();
-      }
-      /**
-       *
-       *
-       * 
-       * Specifies the alignment of data points in individual time series as
-       * well as how to combine the retrieved time series together (such as
-       * when aggregating multiple streams on each resource to a single
-       * stream for each resource or when aggregating streams across all
-       * members of a group of resources). Multiple aggregations
-       * are applied in the order specified.
-       *
-       * This field is similar to the one in the [`ListTimeSeries`
-       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-       * It is advisable to use the `ListTimeSeries` method when debugging this
-       * field.
-       * 

-       *
-       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+        private com.google.protobuf.Duration duration_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            durationBuilder_;
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         *
+         * @return Whether the duration field is set.
+         */
+        public boolean hasDuration() {
+          return ((bitField0_ & 0x00000080) != 0);
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         *
+         * @return The duration.
+         */
+        public com.google.protobuf.Duration getDuration() {
+          if (durationBuilder_ == null) {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          } else {
+            return durationBuilder_.getMessage();
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        public Builder setDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            duration_ = value;
+          } else {
+            durationBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000080;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
+          if (durationBuilder_ == null) {
+            duration_ = builderForValue.build();
+          } else {
+            durationBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000080;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        public Builder mergeDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (((bitField0_ & 0x00000080) != 0)
+                && duration_ != null
+                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getDurationBuilder().mergeFrom(value);
+            } else {
+              duration_ = value;
+            }
+          } else {
+            durationBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000080;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        public Builder clearDuration() {
+          bitField0_ = (bitField0_ & ~0x00000080);
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
+          }
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        public com.google.protobuf.Duration.Builder getDurationBuilder() {
+          bitField0_ |= 0x00000080;
+          onChanged();
+          return getDurationFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+          if (durationBuilder_ != null) {
+            return durationBuilder_.getMessageOrBuilder();
+          } else {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 6;
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            getDurationFieldBuilder() {
+          if (durationBuilder_ == null) {
+            durationBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.protobuf.Duration,
+                    com.google.protobuf.Duration.Builder,
+                    com.google.protobuf.DurationOrBuilder>(
+                    getDuration(), getParentForChildren(), isClean());
+            duration_ = null;
+          }
+          return durationBuilder_;
+        }
+
+        private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
+            triggerBuilder_;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         *
+         * @return Whether the trigger field is set.
+         */
+        public boolean hasTrigger() {
+          return ((bitField0_ & 0x00000100) != 0);
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         *
+         * @return The trigger.
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
+          if (triggerBuilder_ == null) {
+            return trigger_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+                : trigger_;
+          } else {
+            return triggerBuilder_.getMessage();
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
+          if (triggerBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            trigger_ = value;
+          } else {
+            triggerBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000100;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        public Builder setTrigger(
+            com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder builderForValue) {
+          if (triggerBuilder_ == null) {
+            trigger_ = builderForValue.build();
+          } else {
+            triggerBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000100;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        public Builder mergeTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
+          if (triggerBuilder_ == null) {
+            if (((bitField0_ & 0x00000100) != 0)
+                && trigger_ != null
+                && trigger_
+                    != com.google.monitoring.v3.AlertPolicy.Condition.Trigger
+                        .getDefaultInstance()) {
+              getTriggerBuilder().mergeFrom(value);
+            } else {
+              trigger_ = value;
+            }
+          } else {
+            triggerBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000100;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        public Builder clearTrigger() {
+          bitField0_ = (bitField0_ & ~0x00000100);
+          trigger_ = null;
+          if (triggerBuilder_ != null) {
+            triggerBuilder_.dispose();
+            triggerBuilder_ = null;
+          }
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder getTriggerBuilder() {
+          bitField0_ |= 0x00000100;
+          onChanged();
+          return getTriggerFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder
+            getTriggerOrBuilder() {
+          if (triggerBuilder_ != null) {
+            return triggerBuilder_.getMessageOrBuilder();
+          } else {
+            return trigger_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+                : trigger_;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 7;
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
+            getTriggerFieldBuilder() {
+          if (triggerBuilder_ == null) {
+            triggerBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                    com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>(
+                    getTrigger(), getParentForChildren(), isClean());
+            trigger_ = null;
+          }
+          return triggerBuilder_;
+        }
+
+        private int evaluationMissingData_ = 0;
+        /**
+         *
+         *
+         * 
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+         * 
+         *
+         * @return The enum numeric value on the wire for evaluationMissingData.
+         */
+        @java.lang.Override
+        public int getEvaluationMissingDataValue() {
+          return evaluationMissingData_;
+        }
+        /**
+         *
+         *
+         * 
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+         * 
+         *
+         * @param value The enum numeric value on the wire for evaluationMissingData to set.
+         * @return This builder for chaining.
+         */
+        public Builder setEvaluationMissingDataValue(int value) {
+          evaluationMissingData_ = value;
+          bitField0_ |= 0x00000200;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+         * 
+         *
+         * @return The evaluationMissingData.
+         */
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+            getEvaluationMissingData() {
+          com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
+              com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
+                  evaluationMissingData_);
+          return result == null
+              ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
+              : result;
+        }
+        /**
+         *
+         *
+         * 
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+         * 
+         *
+         * @param value The evaluationMissingData to set.
+         * @return This builder for chaining.
+         */
+        public Builder setEvaluationMissingData(
+            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          bitField0_ |= 0x00000200;
+          evaluationMissingData_ = value.getNumber();
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
+         * 

+         *
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 11;
+         * 
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearEvaluationMissingData() {
+          bitField0_ = (bitField0_ & ~0x00000200);
+          evaluationMissingData_ = 0;
+          onChanged();
+          return this;
+        }
+
+        @java.lang.Override
+        public final Builder setUnknownFields(
+            final com.google.protobuf.UnknownFieldSet unknownFields) {
+          return super.setUnknownFields(unknownFields);
+        }
+
+        @java.lang.Override
+        public final Builder mergeUnknownFields(
+            final com.google.protobuf.UnknownFieldSet unknownFields) {
+          return super.mergeUnknownFields(unknownFields);
+        }
+
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)
+      }
+
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MetricThreshold)
+      private static final com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          DEFAULT_INSTANCE;
+
+      static {
+        DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold();
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          getDefaultInstance() {
+        return DEFAULT_INSTANCE;
+      }
+
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
+            @java.lang.Override
+            public MetricThreshold parsePartialFrom(
+                com.google.protobuf.CodedInputStream input,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+              Builder builder = newBuilder();
+              try {
+                builder.mergeFrom(input, extensionRegistry);
+              } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+                throw e.setUnfinishedMessage(builder.buildPartial());
+              } catch (com.google.protobuf.UninitializedMessageException e) {
+                throw e.asInvalidProtocolBufferException()
+                    .setUnfinishedMessage(builder.buildPartial());
+              } catch (java.io.IOException e) {
+                throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                    .setUnfinishedMessage(builder.buildPartial());
+              }
+              return builder.buildPartial();
+            }
+          };
+
+      public static com.google.protobuf.Parser parser() {
+        return PARSER;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Parser getParserForType() {
+        return PARSER;
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          getDefaultInstanceForType() {
+        return DEFAULT_INSTANCE;
+      }
+    }
+
+    public interface MetricAbsenceOrBuilder
+        extends
+        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
+        com.google.protobuf.MessageOrBuilder {
+
+      /**
+       *
+       *
+       * 
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies which time series should be compared with the threshold.
+       *
+       * The filter is similar to the one that is specified in the
+       * [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+       * (that call is useful to verify the time series that will be retrieved /
+       * processed). The filter must specify the metric type and the resource
+       * type. Optionally, it can specify resource labels and metric labels.
+       * This field must not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The filter.
+       */
+      java.lang.String getFilter();
+      /**
+       *
+       *
+       * 
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies which time series should be compared with the threshold.
+       *
+       * The filter is similar to the one that is specified in the
+       * [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+       * (that call is useful to verify the time series that will be retrieved /
+       * processed). The filter must specify the metric type and the resource
+       * type. Optionally, it can specify resource labels and metric labels.
+       * This field must not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The bytes for filter.
+       */
+      com.google.protobuf.ByteString getFilterBytes();
+
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      java.util.List getAggregationsList();
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      com.google.monitoring.v3.Aggregation getAggregations(int index);
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      int getAggregationsCount();
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      java.util.List
+          getAggregationsOrBuilderList();
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index);
+
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must fail to report new
+       * data to be considered failing. The minimum value of this field
+       * is 120 seconds. Larger values that are a multiple of a
+       * minute--for example, 240 or 300 seconds--are supported.
+       * If an invalid value is given, an
+       * error will be returned. The `Duration.nanos` field is
+       * ignored.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return Whether the duration field is set.
+       */
+      boolean hasDuration();
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must fail to report new
+       * data to be considered failing. The minimum value of this field
+       * is 120 seconds. Larger values that are a multiple of a
+       * minute--for example, 240 or 300 seconds--are supported.
+       * If an invalid value is given, an
+       * error will be returned. The `Duration.nanos` field is
+       * ignored.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return The duration.
+       */
+      com.google.protobuf.Duration getDuration();
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must fail to report new
+       * data to be considered failing. The minimum value of this field
+       * is 120 seconds. Larger values that are a multiple of a
+       * minute--for example, 240 or 300 seconds--are supported.
+       * If an invalid value is given, an
+       * error will be returned. The `Duration.nanos` field is
+       * ignored.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       */
+      com.google.protobuf.DurationOrBuilder getDurationOrBuilder();
+
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return Whether the trigger field is set.
+       */
+      boolean hasTrigger();
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return The trigger.
+       */
+      com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger();
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       */
+      com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder();
+    }
+    /**
+     *
+     *
+     * 
+     * A condition type that checks that monitored resources
+     * are reporting data. The configuration defines a metric and
+     * a set of monitored resources. The predicate is considered in violation
+     * when a time series for the specified metric of a monitored
+     * resource does not include any data in the specified `duration`.
+     * 

+     *
+     * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.MetricAbsence}
+     */
+    public static final class MetricAbsence extends com.google.protobuf.GeneratedMessageV3
+        implements
+        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
+        MetricAbsenceOrBuilder {
+      private static final long serialVersionUID = 0L;
+      // Use MetricAbsence.newBuilder() to construct.
+      private MetricAbsence(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+        super(builder);
+      }
+
+      private MetricAbsence() {
+        filter_ = "";
+        aggregations_ = java.util.Collections.emptyList();
+      }
+
+      @java.lang.Override
+      @SuppressWarnings({"unused"})
+      protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+        return new MetricAbsence();
+      }
+
+      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor;
+      }
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.class,
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder.class);
+      }
+
+      public static final int FILTER_FIELD_NUMBER = 1;
+
+      @SuppressWarnings("serial")
+      private volatile java.lang.Object filter_ = "";
+      /**
+       *
+       *
+       * 
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies which time series should be compared with the threshold.
+       *
+       * The filter is similar to the one that is specified in the
+       * [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+       * (that call is useful to verify the time series that will be retrieved /
+       * processed). The filter must specify the metric type and the resource
+       * type. Optionally, it can specify resource labels and metric labels.
+       * This field must not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The filter.
+       */
+      @java.lang.Override
+      public java.lang.String getFilter() {
+        java.lang.Object ref = filter_;
+        if (ref instanceof java.lang.String) {
+          return (java.lang.String) ref;
+        } else {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          filter_ = s;
+          return s;
+        }
+      }
+      /**
+       *
+       *
+       * 
+       * Required. A
+       * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+       * identifies which time series should be compared with the threshold.
+       *
+       * The filter is similar to the one that is specified in the
+       * [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+       * (that call is useful to verify the time series that will be retrieved /
+       * processed). The filter must specify the metric type and the resource
+       * type. Optionally, it can specify resource labels and metric labels.
+       * This field must not exceed 2048 Unicode characters in length.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The bytes for filter.
+       */
+      @java.lang.Override
+      public com.google.protobuf.ByteString getFilterBytes() {
+        java.lang.Object ref = filter_;
+        if (ref instanceof java.lang.String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          filter_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
+      }
+
+      public static final int AGGREGATIONS_FIELD_NUMBER = 5;
+
+      @SuppressWarnings("serial")
+      private java.util.List aggregations_;
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      @java.lang.Override
+      public java.util.List getAggregationsList() {
+        return aggregations_;
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      @java.lang.Override
+      public java.util.List
+          getAggregationsOrBuilderList() {
+        return aggregations_;
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+       */
+      @java.lang.Override
+      public int getAggregationsCount() {
+        return aggregations_.size();
+      }
+      /**
+       *
+       *
+       * 
+       * Specifies the alignment of data points in individual time series as
+       * well as how to combine the retrieved time series together (such as
+       * when aggregating multiple streams on each resource to a single
+       * stream for each resource or when aggregating streams across all
+       * members of a group of resources). Multiple aggregations
+       * are applied in the order specified.
+       *
+       * This field is similar to the one in the [`ListTimeSeries`
+       * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+       * It is advisable to use the `ListTimeSeries` method when debugging this
+       * field.
+       * 

+       *
+       * repeated .google.monitoring.v3.Aggregation aggregations = 5;
        */
       @java.lang.Override
       public com.google.monitoring.v3.Aggregation getAggregations(int index) {
@@ -7055,1737 +8719,2976 @@ public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(in
        * ignored.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return Whether the duration field is set.
+       */
+      @java.lang.Override
+      public boolean hasDuration() {
+        return duration_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must fail to report new
+       * data to be considered failing. The minimum value of this field
+       * is 120 seconds. Larger values that are a multiple of a
+       * minute--for example, 240 or 300 seconds--are supported.
+       * If an invalid value is given, an
+       * error will be returned. The `Duration.nanos` field is
+       * ignored.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return The duration.
+       */
+      @java.lang.Override
+      public com.google.protobuf.Duration getDuration() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      }
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must fail to report new
+       * data to be considered failing. The minimum value of this field
+       * is 120 seconds. Larger values that are a multiple of a
+       * minute--for example, 240 or 300 seconds--are supported.
+       * If an invalid value is given, an
+       * error will be returned. The `Duration.nanos` field is
+       * ignored.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       */
+      @java.lang.Override
+      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      }
+
+      public static final int TRIGGER_FIELD_NUMBER = 3;
+      private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return Whether the trigger field is set.
+       */
+      @java.lang.Override
+      public boolean hasTrigger() {
+        return trigger_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
        *
-       * @return Whether the duration field is set.
+       * @return The trigger.
        */
       @java.lang.Override
-      public boolean hasDuration() {
-        return duration_ != null;
+      public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
+        return trigger_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+            : trigger_;
       }
       /**
        *
        *
        * 
-       * The amount of time that a time series must fail to report new
-       * data to be considered failing. The minimum value of this field
-       * is 120 seconds. Larger values that are a multiple of a
-       * minute--for example, 240 or 300 seconds--are supported.
-       * If an invalid value is given, an
-       * error will be returned. The `Duration.nanos` field is
-       * ignored.
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
-       *
-       * @return The duration.
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
        */
       @java.lang.Override
-      public com.google.protobuf.Duration getDuration() {
-        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder() {
+        return trigger_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+            : trigger_;
+      }
+
+      private byte memoizedIsInitialized = -1;
+
+      @java.lang.Override
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized == 1) return true;
+        if (isInitialized == 0) return false;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      @java.lang.Override
+      public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 1, filter_);
+        }
+        if (duration_ != null) {
+          output.writeMessage(2, getDuration());
+        }
+        if (trigger_ != null) {
+          output.writeMessage(3, getTrigger());
+        }
+        for (int i = 0; i < aggregations_.size(); i++) {
+          output.writeMessage(5, aggregations_.get(i));
+        }
+        getUnknownFields().writeTo(output);
+      }
+
+      @java.lang.Override
+      public int getSerializedSize() {
+        int size = memoizedSize;
+        if (size != -1) return size;
+
+        size = 0;
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, filter_);
+        }
+        if (duration_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getDuration());
+        }
+        if (trigger_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getTrigger());
+        }
+        for (int i = 0; i < aggregations_.size(); i++) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, aggregations_.get(i));
+        }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSize = size;
+        return size;
+      }
+
+      @java.lang.Override
+      public boolean equals(final java.lang.Object obj) {
+        if (obj == this) {
+          return true;
+        }
+        if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)) {
+          return super.equals(obj);
+        }
+        com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence other =
+            (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) obj;
+
+        if (!getFilter().equals(other.getFilter())) return false;
+        if (!getAggregationsList().equals(other.getAggregationsList())) return false;
+        if (hasDuration() != other.hasDuration()) return false;
+        if (hasDuration()) {
+          if (!getDuration().equals(other.getDuration())) return false;
+        }
+        if (hasTrigger() != other.hasTrigger()) return false;
+        if (hasTrigger()) {
+          if (!getTrigger().equals(other.getTrigger())) return false;
+        }
+        if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        return true;
+      }
+
+      @java.lang.Override
+      public int hashCode() {
+        if (memoizedHashCode != 0) {
+          return memoizedHashCode;
+        }
+        int hash = 41;
+        hash = (19 * hash) + getDescriptor().hashCode();
+        hash = (37 * hash) + FILTER_FIELD_NUMBER;
+        hash = (53 * hash) + getFilter().hashCode();
+        if (getAggregationsCount() > 0) {
+          hash = (37 * hash) + AGGREGATIONS_FIELD_NUMBER;
+          hash = (53 * hash) + getAggregationsList().hashCode();
+        }
+        if (hasDuration()) {
+          hash = (37 * hash) + DURATION_FIELD_NUMBER;
+          hash = (53 * hash) + getDuration().hashCode();
+        }
+        if (hasTrigger()) {
+          hash = (37 * hash) + TRIGGER_FIELD_NUMBER;
+          hash = (53 * hash) + getTrigger().hashCode();
+        }
+        hash = (29 * hash) + getUnknownFields().hashCode();
+        memoizedHashCode = hash;
+        return hash;
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseDelimitedFrom(
+          java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseDelimitedFrom(
+          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      @java.lang.Override
+      public Builder newBuilderForType() {
+        return newBuilder();
+      }
+
+      public static Builder newBuilder() {
+        return DEFAULT_INSTANCE.toBuilder();
+      }
+
+      public static Builder newBuilder(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence prototype) {
+        return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+      }
+
+      @java.lang.Override
+      public Builder toBuilder() {
+        return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+      }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
       }
       /**
        *
        *
        * 
-       * The amount of time that a time series must fail to report new
-       * data to be considered failing. The minimum value of this field
-       * is 120 seconds. Larger values that are a multiple of a
-       * minute--for example, 240 or 300 seconds--are supported.
-       * If an invalid value is given, an
-       * error will be returned. The `Duration.nanos` field is
-       * ignored.
+       * A condition type that checks that monitored resources
+       * are reporting data. The configuration defines a metric and
+       * a set of monitored resources. The predicate is considered in violation
+       * when a time series for the specified metric of a monitored
+       * resource does not include any data in the specified `duration`.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
+       * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.MetricAbsence}
        */
-      @java.lang.Override
-      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
-        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
-      }
+      public static final class Builder
+          extends com.google.protobuf.GeneratedMessageV3.Builder
+          implements
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor;
+        }
+
+        @java.lang.Override
+        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.class,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder.class);
+        }
+
+        // Construct using com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.newBuilder()
+        private Builder() {}
+
+        private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+          super(parent);
+        }
+
+        @java.lang.Override
+        public Builder clear() {
+          super.clear();
+          bitField0_ = 0;
+          filter_ = "";
+          if (aggregationsBuilder_ == null) {
+            aggregations_ = java.util.Collections.emptyList();
+          } else {
+            aggregations_ = null;
+            aggregationsBuilder_.clear();
+          }
+          bitField0_ = (bitField0_ & ~0x00000002);
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
+          }
+          trigger_ = null;
+          if (triggerBuilder_ != null) {
+            triggerBuilder_.dispose();
+            triggerBuilder_ = null;
+          }
+          return this;
+        }
+
+        @java.lang.Override
+        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor;
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
+            getDefaultInstanceForType() {
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence build() {
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence buildPartial() {
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result =
+              new com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence(this);
+          buildPartialRepeatedFields(result);
+          if (bitField0_ != 0) {
+            buildPartial0(result);
+          }
+          onBuilt();
+          return result;
+        }
+
+        private void buildPartialRepeatedFields(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result) {
+          if (aggregationsBuilder_ == null) {
+            if (((bitField0_ & 0x00000002) != 0)) {
+              aggregations_ = java.util.Collections.unmodifiableList(aggregations_);
+              bitField0_ = (bitField0_ & ~0x00000002);
+            }
+            result.aggregations_ = aggregations_;
+          } else {
+            result.aggregations_ = aggregationsBuilder_.build();
+          }
+        }
+
+        private void buildPartial0(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result) {
+          int from_bitField0_ = bitField0_;
+          if (((from_bitField0_ & 0x00000001) != 0)) {
+            result.filter_ = filter_;
+          }
+          if (((from_bitField0_ & 0x00000004) != 0)) {
+            result.duration_ = durationBuilder_ == null ? duration_ : durationBuilder_.build();
+          }
+          if (((from_bitField0_ & 0x00000008) != 0)) {
+            result.trigger_ = triggerBuilder_ == null ? trigger_ : triggerBuilder_.build();
+          }
+        }
+
+        @java.lang.Override
+        public Builder clone() {
+          return super.clone();
+        }
+
+        @java.lang.Override
+        public Builder setField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.setField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+          return super.clearField(field);
+        }
+
+        @java.lang.Override
+        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+          return super.clearOneof(oneof);
+        }
+
+        @java.lang.Override
+        public Builder setRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field,
+            int index,
+            java.lang.Object value) {
+          return super.setRepeatedField(field, index, value);
+        }
+
+        @java.lang.Override
+        public Builder addRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.addRepeatedField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) {
+            return mergeFrom((com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(
+            com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence other) {
+          if (other
+              == com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance())
+            return this;
+          if (!other.getFilter().isEmpty()) {
+            filter_ = other.filter_;
+            bitField0_ |= 0x00000001;
+            onChanged();
+          }
+          if (aggregationsBuilder_ == null) {
+            if (!other.aggregations_.isEmpty()) {
+              if (aggregations_.isEmpty()) {
+                aggregations_ = other.aggregations_;
+                bitField0_ = (bitField0_ & ~0x00000002);
+              } else {
+                ensureAggregationsIsMutable();
+                aggregations_.addAll(other.aggregations_);
+              }
+              onChanged();
+            }
+          } else {
+            if (!other.aggregations_.isEmpty()) {
+              if (aggregationsBuilder_.isEmpty()) {
+                aggregationsBuilder_.dispose();
+                aggregationsBuilder_ = null;
+                aggregations_ = other.aggregations_;
+                bitField0_ = (bitField0_ & ~0x00000002);
+                aggregationsBuilder_ =
+                    com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                        ? getAggregationsFieldBuilder()
+                        : null;
+              } else {
+                aggregationsBuilder_.addAllMessages(other.aggregations_);
+              }
+            }
+          }
+          if (other.hasDuration()) {
+            mergeDuration(other.getDuration());
+          }
+          if (other.hasTrigger()) {
+            mergeTrigger(other.getTrigger());
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          onChanged();
+          return this;
+        }
+
+        @java.lang.Override
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          if (extensionRegistry == null) {
+            throw new java.lang.NullPointerException();
+          }
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                case 10:
+                  {
+                    filter_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000001;
+                    break;
+                  } // case 10
+                case 18:
+                  {
+                    input.readMessage(getDurationFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000004;
+                    break;
+                  } // case 18
+                case 26:
+                  {
+                    input.readMessage(getTriggerFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000008;
+                    break;
+                  } // case 26
+                case 42:
+                  {
+                    com.google.monitoring.v3.Aggregation m =
+                        input.readMessage(
+                            com.google.monitoring.v3.Aggregation.parser(), extensionRegistry);
+                    if (aggregationsBuilder_ == null) {
+                      ensureAggregationsIsMutable();
+                      aggregations_.add(m);
+                    } else {
+                      aggregationsBuilder_.addMessage(m);
+                    }
+                    break;
+                  } // case 42
+                default:
+                  {
+                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                      done = true; // was an endgroup tag
+                    }
+                    break;
+                  } // default:
+              } // switch (tag)
+            } // while (!done)
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.unwrapIOException();
+          } finally {
+            onChanged();
+          } // finally
+          return this;
+        }
 
-      public static final int TRIGGER_FIELD_NUMBER = 3;
-      private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       *
-       * @return Whether the trigger field is set.
-       */
-      @java.lang.Override
-      public boolean hasTrigger() {
-        return trigger_ != null;
-      }
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       *
-       * @return The trigger.
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
-        return trigger_ == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-            : trigger_;
-      }
-      /**
-       *
-       *
-       * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder() {
-        return trigger_ == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-            : trigger_;
-      }
+        private int bitField0_;
 
-      private byte memoizedIsInitialized = -1;
+        private java.lang.Object filter_ = "";
+        /**
+         *
+         *
+         * 
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
+         *
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return The filter.
+         */
+        public java.lang.String getFilter() {
+          java.lang.Object ref = filter_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            filter_ = s;
+            return s;
+          } else {
+            return (java.lang.String) ref;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
+         *
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return The bytes for filter.
+         */
+        public com.google.protobuf.ByteString getFilterBytes() {
+          java.lang.Object ref = filter_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            filter_ = b;
+            return b;
+          } else {
+            return (com.google.protobuf.ByteString) ref;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
+         *
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @param value The filter to set.
+         * @return This builder for chaining.
+         */
+        public Builder setFilter(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          filter_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
+         *
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearFilter() {
+          filter_ = getDefaultInstance().getFilter();
+          bitField0_ = (bitField0_ & ~0x00000001);
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Required. A
+         * [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+         * identifies which time series should be compared with the threshold.
+         *
+         * The filter is similar to the one that is specified in the
+         * [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
+         * (that call is useful to verify the time series that will be retrieved /
+         * processed). The filter must specify the metric type and the resource
+         * type. Optionally, it can specify resource labels and metric labels.
+         * This field must not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @param value The bytes for filter to set.
+         * @return This builder for chaining.
+         */
+        public Builder setFilterBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          filter_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
 
-      @java.lang.Override
-      public final boolean isInitialized() {
-        byte isInitialized = memoizedIsInitialized;
-        if (isInitialized == 1) return true;
-        if (isInitialized == 0) return false;
+        private java.util.List aggregations_ =
+            java.util.Collections.emptyList();
 
-        memoizedIsInitialized = 1;
-        return true;
-      }
+        private void ensureAggregationsIsMutable() {
+          if (!((bitField0_ & 0x00000002) != 0)) {
+            aggregations_ =
+                new java.util.ArrayList(aggregations_);
+            bitField0_ |= 0x00000002;
+          }
+        }
+
+        private com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.monitoring.v3.Aggregation,
+                com.google.monitoring.v3.Aggregation.Builder,
+                com.google.monitoring.v3.AggregationOrBuilder>
+            aggregationsBuilder_;
+
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public java.util.List getAggregationsList() {
+          if (aggregationsBuilder_ == null) {
+            return java.util.Collections.unmodifiableList(aggregations_);
+          } else {
+            return aggregationsBuilder_.getMessageList();
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public int getAggregationsCount() {
+          if (aggregationsBuilder_ == null) {
+            return aggregations_.size();
+          } else {
+            return aggregationsBuilder_.getCount();
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public com.google.monitoring.v3.Aggregation getAggregations(int index) {
+          if (aggregationsBuilder_ == null) {
+            return aggregations_.get(index);
+          } else {
+            return aggregationsBuilder_.getMessage(index);
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder setAggregations(int index, com.google.monitoring.v3.Aggregation value) {
+          if (aggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureAggregationsIsMutable();
+            aggregations_.set(index, value);
+            onChanged();
+          } else {
+            aggregationsBuilder_.setMessage(index, value);
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder setAggregations(
+            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.set(index, builderForValue.build());
+            onChanged();
+          } else {
+            aggregationsBuilder_.setMessage(index, builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder addAggregations(com.google.monitoring.v3.Aggregation value) {
+          if (aggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureAggregationsIsMutable();
+            aggregations_.add(value);
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(value);
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder addAggregations(int index, com.google.monitoring.v3.Aggregation value) {
+          if (aggregationsBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            ensureAggregationsIsMutable();
+            aggregations_.add(index, value);
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(index, value);
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder addAggregations(
+            com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.add(builderForValue.build());
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder addAggregations(
+            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.add(index, builderForValue.build());
+            onChanged();
+          } else {
+            aggregationsBuilder_.addMessage(index, builderForValue.build());
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder addAllAggregations(
+            java.lang.Iterable values) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            com.google.protobuf.AbstractMessageLite.Builder.addAll(values, aggregations_);
+            onChanged();
+          } else {
+            aggregationsBuilder_.addAllMessages(values);
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder clearAggregations() {
+          if (aggregationsBuilder_ == null) {
+            aggregations_ = java.util.Collections.emptyList();
+            bitField0_ = (bitField0_ & ~0x00000002);
+            onChanged();
+          } else {
+            aggregationsBuilder_.clear();
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public Builder removeAggregations(int index) {
+          if (aggregationsBuilder_ == null) {
+            ensureAggregationsIsMutable();
+            aggregations_.remove(index);
+            onChanged();
+          } else {
+            aggregationsBuilder_.remove(index);
+          }
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public com.google.monitoring.v3.Aggregation.Builder getAggregationsBuilder(int index) {
+          return getAggregationsFieldBuilder().getBuilder(index);
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index) {
+          if (aggregationsBuilder_ == null) {
+            return aggregations_.get(index);
+          } else {
+            return aggregationsBuilder_.getMessageOrBuilder(index);
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public java.util.List
+            getAggregationsOrBuilderList() {
+          if (aggregationsBuilder_ != null) {
+            return aggregationsBuilder_.getMessageOrBuilderList();
+          } else {
+            return java.util.Collections.unmodifiableList(aggregations_);
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder() {
+          return getAggregationsFieldBuilder()
+              .addBuilder(com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder(int index) {
+          return getAggregationsFieldBuilder()
+              .addBuilder(index, com.google.monitoring.v3.Aggregation.getDefaultInstance());
+        }
+        /**
+         *
+         *
+         * 
+         * Specifies the alignment of data points in individual time series as
+         * well as how to combine the retrieved time series together (such as
+         * when aggregating multiple streams on each resource to a single
+         * stream for each resource or when aggregating streams across all
+         * members of a group of resources). Multiple aggregations
+         * are applied in the order specified.
+         *
+         * This field is similar to the one in the [`ListTimeSeries`
+         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
+         * It is advisable to use the `ListTimeSeries` method when debugging this
+         * field.
+         * 

+         *
+         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
+         */
+        public java.util.List
+            getAggregationsBuilderList() {
+          return getAggregationsFieldBuilder().getBuilderList();
+        }
 
-      @java.lang.Override
-      public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
-          com.google.protobuf.GeneratedMessageV3.writeString(output, 1, filter_);
+        private com.google.protobuf.RepeatedFieldBuilderV3<
+                com.google.monitoring.v3.Aggregation,
+                com.google.monitoring.v3.Aggregation.Builder,
+                com.google.monitoring.v3.AggregationOrBuilder>
+            getAggregationsFieldBuilder() {
+          if (aggregationsBuilder_ == null) {
+            aggregationsBuilder_ =
+                new com.google.protobuf.RepeatedFieldBuilderV3<
+                    com.google.monitoring.v3.Aggregation,
+                    com.google.monitoring.v3.Aggregation.Builder,
+                    com.google.monitoring.v3.AggregationOrBuilder>(
+                    aggregations_,
+                    ((bitField0_ & 0x00000002) != 0),
+                    getParentForChildren(),
+                    isClean());
+            aggregations_ = null;
+          }
+          return aggregationsBuilder_;
         }
-        if (duration_ != null) {
-          output.writeMessage(2, getDuration());
+
+        private com.google.protobuf.Duration duration_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            durationBuilder_;
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         *
+         * @return Whether the duration field is set.
+         */
+        public boolean hasDuration() {
+          return ((bitField0_ & 0x00000004) != 0);
         }
-        if (trigger_ != null) {
-          output.writeMessage(3, getTrigger());
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         *
+         * @return The duration.
+         */
+        public com.google.protobuf.Duration getDuration() {
+          if (durationBuilder_ == null) {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          } else {
+            return durationBuilder_.getMessage();
+          }
         }
-        for (int i = 0; i < aggregations_.size(); i++) {
-          output.writeMessage(5, aggregations_.get(i));
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder setDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            duration_ = value;
+          } else {
+            durationBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
+          if (durationBuilder_ == null) {
+            duration_ = builderForValue.build();
+          } else {
+            durationBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder mergeDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (((bitField0_ & 0x00000004) != 0)
+                && duration_ != null
+                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getDurationBuilder().mergeFrom(value);
+            } else {
+              duration_ = value;
+            }
+          } else {
+            durationBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder clearDuration() {
+          bitField0_ = (bitField0_ & ~0x00000004);
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
+          }
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public com.google.protobuf.Duration.Builder getDurationBuilder() {
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return getDurationFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+          if (durationBuilder_ != null) {
+            return durationBuilder_.getMessageOrBuilder();
+          } else {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must fail to report new
+         * data to be considered failing. The minimum value of this field
+         * is 120 seconds. Larger values that are a multiple of a
+         * minute--for example, 240 or 300 seconds--are supported.
+         * If an invalid value is given, an
+         * error will be returned. The `Duration.nanos` field is
+         * ignored.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            getDurationFieldBuilder() {
+          if (durationBuilder_ == null) {
+            durationBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.protobuf.Duration,
+                    com.google.protobuf.Duration.Builder,
+                    com.google.protobuf.DurationOrBuilder>(
+                    getDuration(), getParentForChildren(), isClean());
+            duration_ = null;
+          }
+          return durationBuilder_;
+        }
+
+        private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
+            triggerBuilder_;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         *
+         * @return Whether the trigger field is set.
+         */
+        public boolean hasTrigger() {
+          return ((bitField0_ & 0x00000008) != 0);
         }
-        getUnknownFields().writeTo(output);
-      }
-
-      @java.lang.Override
-      public int getSerializedSize() {
-        int size = memoizedSize;
-        if (size != -1) return size;
-
-        size = 0;
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
-          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, filter_);
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         *
+         * @return The trigger.
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
+          if (triggerBuilder_ == null) {
+            return trigger_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+                : trigger_;
+          } else {
+            return triggerBuilder_.getMessage();
+          }
         }
-        if (duration_ != null) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getDuration());
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
+          if (triggerBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            trigger_ = value;
+          } else {
+            triggerBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000008;
+          onChanged();
+          return this;
         }
-        if (trigger_ != null) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getTrigger());
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public Builder setTrigger(
+            com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder builderForValue) {
+          if (triggerBuilder_ == null) {
+            trigger_ = builderForValue.build();
+          } else {
+            triggerBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000008;
+          onChanged();
+          return this;
         }
-        for (int i = 0; i < aggregations_.size(); i++) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, aggregations_.get(i));
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public Builder mergeTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
+          if (triggerBuilder_ == null) {
+            if (((bitField0_ & 0x00000008) != 0)
+                && trigger_ != null
+                && trigger_
+                    != com.google.monitoring.v3.AlertPolicy.Condition.Trigger
+                        .getDefaultInstance()) {
+              getTriggerBuilder().mergeFrom(value);
+            } else {
+              trigger_ = value;
+            }
+          } else {
+            triggerBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000008;
+          onChanged();
+          return this;
         }
-        size += getUnknownFields().getSerializedSize();
-        memoizedSize = size;
-        return size;
-      }
-
-      @java.lang.Override
-      public boolean equals(final java.lang.Object obj) {
-        if (obj == this) {
-          return true;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public Builder clearTrigger() {
+          bitField0_ = (bitField0_ & ~0x00000008);
+          trigger_ = null;
+          if (triggerBuilder_ != null) {
+            triggerBuilder_.dispose();
+            triggerBuilder_ = null;
+          }
+          onChanged();
+          return this;
         }
-        if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)) {
-          return super.equals(obj);
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder getTriggerBuilder() {
+          bitField0_ |= 0x00000008;
+          onChanged();
+          return getTriggerFieldBuilder().getBuilder();
         }
-        com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence other =
-            (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) obj;
-
-        if (!getFilter().equals(other.getFilter())) return false;
-        if (!getAggregationsList().equals(other.getAggregationsList())) return false;
-        if (hasDuration() != other.hasDuration()) return false;
-        if (hasDuration()) {
-          if (!getDuration().equals(other.getDuration())) return false;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder
+            getTriggerOrBuilder() {
+          if (triggerBuilder_ != null) {
+            return triggerBuilder_.getMessageOrBuilder();
+          } else {
+            return trigger_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+                : trigger_;
+          }
         }
-        if (hasTrigger() != other.hasTrigger()) return false;
-        if (hasTrigger()) {
-          if (!getTrigger().equals(other.getTrigger())) return false;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
+            getTriggerFieldBuilder() {
+          if (triggerBuilder_ == null) {
+            triggerBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                    com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>(
+                    getTrigger(), getParentForChildren(), isClean());
+            trigger_ = null;
+          }
+          return triggerBuilder_;
         }
-        if (!getUnknownFields().equals(other.getUnknownFields())) return false;
-        return true;
-      }
 
-      @java.lang.Override
-      public int hashCode() {
-        if (memoizedHashCode != 0) {
-          return memoizedHashCode;
-        }
-        int hash = 41;
-        hash = (19 * hash) + getDescriptor().hashCode();
-        hash = (37 * hash) + FILTER_FIELD_NUMBER;
-        hash = (53 * hash) + getFilter().hashCode();
-        if (getAggregationsCount() > 0) {
-          hash = (37 * hash) + AGGREGATIONS_FIELD_NUMBER;
-          hash = (53 * hash) + getAggregationsList().hashCode();
-        }
-        if (hasDuration()) {
-          hash = (37 * hash) + DURATION_FIELD_NUMBER;
-          hash = (53 * hash) + getDuration().hashCode();
-        }
-        if (hasTrigger()) {
-          hash = (37 * hash) + TRIGGER_FIELD_NUMBER;
-          hash = (53 * hash) + getTrigger().hashCode();
+        @java.lang.Override
+        public final Builder setUnknownFields(
+            final com.google.protobuf.UnknownFieldSet unknownFields) {
+          return super.setUnknownFields(unknownFields);
         }
-        hash = (29 * hash) + getUnknownFields().hashCode();
-        memoizedHashCode = hash;
-        return hash;
-      }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data);
-      }
+        @java.lang.Override
+        public final Builder mergeUnknownFields(
+            final com.google.protobuf.UnknownFieldSet unknownFields) {
+          return super.mergeUnknownFields(unknownFields);
+        }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data, extensionRegistry);
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          com.google.protobuf.ByteString data)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data);
-      }
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
+      private static final com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
+          DEFAULT_INSTANCE;
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          com.google.protobuf.ByteString data,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data, extensionRegistry);
+      static {
+        DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence();
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data);
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
+          getDefaultInstance() {
+        return DEFAULT_INSTANCE;
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
-        return PARSER.parseFrom(data, extensionRegistry);
-      }
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
+            @java.lang.Override
+            public MetricAbsence parsePartialFrom(
+                com.google.protobuf.CodedInputStream input,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+              Builder builder = newBuilder();
+              try {
+                builder.mergeFrom(input, extensionRegistry);
+              } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+                throw e.setUnfinishedMessage(builder.buildPartial());
+              } catch (com.google.protobuf.UninitializedMessageException e) {
+                throw e.asInvalidProtocolBufferException()
+                    .setUnfinishedMessage(builder.buildPartial());
+              } catch (java.io.IOException e) {
+                throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                    .setUnfinishedMessage(builder.buildPartial());
+              }
+              return builder.buildPartial();
+            }
+          };
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          java.io.InputStream input) throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      public static com.google.protobuf.Parser parser() {
+        return PARSER;
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
-            PARSER, input, extensionRegistry);
+      @java.lang.Override
+      public com.google.protobuf.Parser getParserForType() {
+        return PARSER;
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseDelimitedFrom(
-          java.io.InputStream input) throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
+          getDefaultInstanceForType() {
+        return DEFAULT_INSTANCE;
       }
+    }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseDelimitedFrom(
-          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
-            PARSER, input, extensionRegistry);
-      }
+    public interface LogMatchOrBuilder
+        extends
+        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
+        com.google.protobuf.MessageOrBuilder {
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          com.google.protobuf.CodedInputStream input) throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      /**
+       *
+       *
+       * 
+       * Required. A logs-based filter. See [Advanced Logs
+       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+       * for how this filter should be constructed.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The filter.
+       */
+      java.lang.String getFilter();
+      /**
+       *
+       *
+       * 
+       * Required. A logs-based filter. See [Advanced Logs
+       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+       * for how this filter should be constructed.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The bytes for filter.
+       */
+      com.google.protobuf.ByteString getFilterBytes();
+
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      int getLabelExtractorsCount();
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      boolean containsLabelExtractors(java.lang.String key);
+      /** Use {@link #getLabelExtractorsMap()} instead. */
+      @java.lang.Deprecated
+      java.util.Map getLabelExtractors();
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      java.util.Map getLabelExtractorsMap();
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      /* nullable */
+      java.lang.String getLabelExtractorsOrDefault(
+          java.lang.String key,
+          /* nullable */
+          java.lang.String defaultValue);
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      java.lang.String getLabelExtractorsOrThrow(java.lang.String key);
+    }
+    /**
+     *
+     *
+     * 
+     * A condition type that checks whether a log message in the [scoping
+     * project](https://cloud.google.com/monitoring/api/v3#project_name)
+     * satisfies the given filter. Logs from other projects in the metrics
+     * scope are not evaluated.
+     * 

+     *
+     * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.LogMatch}
+     */
+    public static final class LogMatch extends com.google.protobuf.GeneratedMessageV3
+        implements
+        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
+        LogMatchOrBuilder {
+      private static final long serialVersionUID = 0L;
+      // Use LogMatch.newBuilder() to construct.
+      private LogMatch(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+        super(builder);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence parseFrom(
-          com.google.protobuf.CodedInputStream input,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
-            PARSER, input, extensionRegistry);
+      private LogMatch() {
+        filter_ = "";
       }
 
       @java.lang.Override
-      public Builder newBuilderForType() {
-        return newBuilder();
-      }
-
-      public static Builder newBuilder() {
-        return DEFAULT_INSTANCE.toBuilder();
-      }
-
-      public static Builder newBuilder(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence prototype) {
-        return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+      @SuppressWarnings({"unused"})
+      protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+        return new LogMatch();
       }
 
-      @java.lang.Override
-      public Builder toBuilder() {
-        return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_descriptor;
       }
 
+      @SuppressWarnings({"rawtypes"})
       @java.lang.Override
-      protected Builder newBuilderForType(
-          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-        Builder builder = new Builder(parent);
-        return builder;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition type that checks that monitored resources
-       * are reporting data. The configuration defines a metric and
-       * a set of monitored resources. The predicate is considered in violation
-       * when a time series for the specified metric of a monitored
-       * resource does not include any data in the specified `duration`.
-       * 

-       *
-       * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.MetricAbsence}
-       */
-      public static final class Builder
-          extends com.google.protobuf.GeneratedMessageV3.Builder
-          implements
-          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder {
-        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
-          return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor;
-        }
-
-        @java.lang.Override
-        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-            internalGetFieldAccessorTable() {
-          return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_fieldAccessorTable
-              .ensureFieldAccessorsInitialized(
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.class,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder.class);
-        }
-
-        // Construct using com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.newBuilder()
-        private Builder() {}
-
-        private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-          super(parent);
-        }
-
-        @java.lang.Override
-        public Builder clear() {
-          super.clear();
-          bitField0_ = 0;
-          filter_ = "";
-          if (aggregationsBuilder_ == null) {
-            aggregations_ = java.util.Collections.emptyList();
-          } else {
-            aggregations_ = null;
-            aggregationsBuilder_.clear();
-          }
-          bitField0_ = (bitField0_ & ~0x00000002);
-          duration_ = null;
-          if (durationBuilder_ != null) {
-            durationBuilder_.dispose();
-            durationBuilder_ = null;
-          }
-          trigger_ = null;
-          if (triggerBuilder_ != null) {
-            triggerBuilder_.dispose();
-            triggerBuilder_ = null;
-          }
-          return this;
-        }
-
-        @java.lang.Override
-        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
-          return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor;
-        }
-
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
-            getDefaultInstanceForType() {
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
-        }
-
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence build() {
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result = buildPartial();
-          if (!result.isInitialized()) {
-            throw newUninitializedMessageException(result);
-          }
-          return result;
-        }
-
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence buildPartial() {
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result =
-              new com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence(this);
-          buildPartialRepeatedFields(result);
-          if (bitField0_ != 0) {
-            buildPartial0(result);
-          }
-          onBuilt();
-          return result;
-        }
-
-        private void buildPartialRepeatedFields(
-            com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result) {
-          if (aggregationsBuilder_ == null) {
-            if (((bitField0_ & 0x00000002) != 0)) {
-              aggregations_ = java.util.Collections.unmodifiableList(aggregations_);
-              bitField0_ = (bitField0_ & ~0x00000002);
-            }
-            result.aggregations_ = aggregations_;
-          } else {
-            result.aggregations_ = aggregationsBuilder_.build();
-          }
-        }
-
-        private void buildPartial0(
-            com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence result) {
-          int from_bitField0_ = bitField0_;
-          if (((from_bitField0_ & 0x00000001) != 0)) {
-            result.filter_ = filter_;
-          }
-          if (((from_bitField0_ & 0x00000004) != 0)) {
-            result.duration_ = durationBuilder_ == null ? duration_ : durationBuilder_.build();
-          }
-          if (((from_bitField0_ & 0x00000008) != 0)) {
-            result.trigger_ = triggerBuilder_ == null ? trigger_ : triggerBuilder_.build();
-          }
-        }
-
-        @java.lang.Override
-        public Builder clone() {
-          return super.clone();
-        }
-
-        @java.lang.Override
-        public Builder setField(
-            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-          return super.setField(field, value);
-        }
-
-        @java.lang.Override
-        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-          return super.clearField(field);
-        }
-
-        @java.lang.Override
-        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-          return super.clearOneof(oneof);
-        }
-
-        @java.lang.Override
-        public Builder setRepeatedField(
-            com.google.protobuf.Descriptors.FieldDescriptor field,
-            int index,
-            java.lang.Object value) {
-          return super.setRepeatedField(field, index, value);
-        }
-
-        @java.lang.Override
-        public Builder addRepeatedField(
-            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-          return super.addRepeatedField(field, value);
-        }
-
-        @java.lang.Override
-        public Builder mergeFrom(com.google.protobuf.Message other) {
-          if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) {
-            return mergeFrom((com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) other);
-          } else {
-            super.mergeFrom(other);
-            return this;
-          }
-        }
-
-        public Builder mergeFrom(
-            com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence other) {
-          if (other
-              == com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance())
-            return this;
-          if (!other.getFilter().isEmpty()) {
-            filter_ = other.filter_;
-            bitField0_ |= 0x00000001;
-            onChanged();
-          }
-          if (aggregationsBuilder_ == null) {
-            if (!other.aggregations_.isEmpty()) {
-              if (aggregations_.isEmpty()) {
-                aggregations_ = other.aggregations_;
-                bitField0_ = (bitField0_ & ~0x00000002);
-              } else {
-                ensureAggregationsIsMutable();
-                aggregations_.addAll(other.aggregations_);
-              }
-              onChanged();
-            }
-          } else {
-            if (!other.aggregations_.isEmpty()) {
-              if (aggregationsBuilder_.isEmpty()) {
-                aggregationsBuilder_.dispose();
-                aggregationsBuilder_ = null;
-                aggregations_ = other.aggregations_;
-                bitField0_ = (bitField0_ & ~0x00000002);
-                aggregationsBuilder_ =
-                    com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
-                        ? getAggregationsFieldBuilder()
-                        : null;
-              } else {
-                aggregationsBuilder_.addAllMessages(other.aggregations_);
-              }
-            }
-          }
-          if (other.hasDuration()) {
-            mergeDuration(other.getDuration());
-          }
-          if (other.hasTrigger()) {
-            mergeTrigger(other.getTrigger());
-          }
-          this.mergeUnknownFields(other.getUnknownFields());
-          onChanged();
-          return this;
+      protected com.google.protobuf.MapField internalGetMapField(int number) {
+        switch (number) {
+          case 2:
+            return internalGetLabelExtractors();
+          default:
+            throw new RuntimeException("Invalid map field number: " + number);
         }
+      }
 
-        @java.lang.Override
-        public final boolean isInitialized() {
-          return true;
-        }
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.class,
+                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder.class);
+      }
 
-        @java.lang.Override
-        public Builder mergeFrom(
-            com.google.protobuf.CodedInputStream input,
-            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-            throws java.io.IOException {
-          if (extensionRegistry == null) {
-            throw new java.lang.NullPointerException();
-          }
-          try {
-            boolean done = false;
-            while (!done) {
-              int tag = input.readTag();
-              switch (tag) {
-                case 0:
-                  done = true;
-                  break;
-                case 10:
-                  {
-                    filter_ = input.readStringRequireUtf8();
-                    bitField0_ |= 0x00000001;
-                    break;
-                  } // case 10
-                case 18:
-                  {
-                    input.readMessage(getDurationFieldBuilder().getBuilder(), extensionRegistry);
-                    bitField0_ |= 0x00000004;
-                    break;
-                  } // case 18
-                case 26:
-                  {
-                    input.readMessage(getTriggerFieldBuilder().getBuilder(), extensionRegistry);
-                    bitField0_ |= 0x00000008;
-                    break;
-                  } // case 26
-                case 42:
-                  {
-                    com.google.monitoring.v3.Aggregation m =
-                        input.readMessage(
-                            com.google.monitoring.v3.Aggregation.parser(), extensionRegistry);
-                    if (aggregationsBuilder_ == null) {
-                      ensureAggregationsIsMutable();
-                      aggregations_.add(m);
-                    } else {
-                      aggregationsBuilder_.addMessage(m);
-                    }
-                    break;
-                  } // case 42
-                default:
-                  {
-                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
-                      done = true; // was an endgroup tag
-                    }
-                    break;
-                  } // default:
-              } // switch (tag)
-            } // while (!done)
-          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-            throw e.unwrapIOException();
-          } finally {
-            onChanged();
-          } // finally
-          return this;
+      public static final int FILTER_FIELD_NUMBER = 1;
+
+      @SuppressWarnings("serial")
+      private volatile java.lang.Object filter_ = "";
+      /**
+       *
+       *
+       * 
+       * Required. A logs-based filter. See [Advanced Logs
+       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+       * for how this filter should be constructed.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The filter.
+       */
+      @java.lang.Override
+      public java.lang.String getFilter() {
+        java.lang.Object ref = filter_;
+        if (ref instanceof java.lang.String) {
+          return (java.lang.String) ref;
+        } else {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          filter_ = s;
+          return s;
+        }
+      }
+      /**
+       *
+       *
+       * 
+       * Required. A logs-based filter. See [Advanced Logs
+       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+       * for how this filter should be constructed.
+       * 

+       *
+       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The bytes for filter.
+       */
+      @java.lang.Override
+      public com.google.protobuf.ByteString getFilterBytes() {
+        java.lang.Object ref = filter_;
+        if (ref instanceof java.lang.String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          filter_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
         }
+      }
 
-        private int bitField0_;
+      public static final int LABEL_EXTRACTORS_FIELD_NUMBER = 2;
 
-        private java.lang.Object filter_ = "";
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return The filter.
-         */
-        public java.lang.String getFilter() {
-          java.lang.Object ref = filter_;
-          if (!(ref instanceof java.lang.String)) {
-            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-            java.lang.String s = bs.toStringUtf8();
-            filter_ = s;
-            return s;
-          } else {
-            return (java.lang.String) ref;
-          }
-        }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return The bytes for filter.
-         */
-        public com.google.protobuf.ByteString getFilterBytes() {
-          java.lang.Object ref = filter_;
-          if (ref instanceof String) {
-            com.google.protobuf.ByteString b =
-                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-            filter_ = b;
-            return b;
-          } else {
-            return (com.google.protobuf.ByteString) ref;
-          }
+      private static final class LabelExtractorsDefaultEntryHolder {
+        static final com.google.protobuf.MapEntry defaultEntry =
+            com.google.protobuf.MapEntry.newDefaultInstance(
+                com.google.monitoring.v3.AlertProto
+                    .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_LabelExtractorsEntry_descriptor,
+                com.google.protobuf.WireFormat.FieldType.STRING,
+                "",
+                com.google.protobuf.WireFormat.FieldType.STRING,
+                "");
+      }
+
+      @SuppressWarnings("serial")
+      private com.google.protobuf.MapField labelExtractors_;
+
+      private com.google.protobuf.MapField
+          internalGetLabelExtractors() {
+        if (labelExtractors_ == null) {
+          return com.google.protobuf.MapField.emptyMapField(
+              LabelExtractorsDefaultEntryHolder.defaultEntry);
         }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @param value The filter to set.
-         * @return This builder for chaining.
-         */
-        public Builder setFilter(java.lang.String value) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          filter_ = value;
-          bitField0_ |= 0x00000001;
-          onChanged();
-          return this;
+        return labelExtractors_;
+      }
+
+      public int getLabelExtractorsCount() {
+        return internalGetLabelExtractors().getMap().size();
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      @java.lang.Override
+      public boolean containsLabelExtractors(java.lang.String key) {
+        if (key == null) {
+          throw new NullPointerException("map key");
         }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return This builder for chaining.
-         */
-        public Builder clearFilter() {
-          filter_ = getDefaultInstance().getFilter();
-          bitField0_ = (bitField0_ & ~0x00000001);
-          onChanged();
-          return this;
+        return internalGetLabelExtractors().getMap().containsKey(key);
+      }
+      /** Use {@link #getLabelExtractorsMap()} instead. */
+      @java.lang.Override
+      @java.lang.Deprecated
+      public java.util.Map getLabelExtractors() {
+        return getLabelExtractorsMap();
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      @java.lang.Override
+      public java.util.Map getLabelExtractorsMap() {
+        return internalGetLabelExtractors().getMap();
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      @java.lang.Override
+      public /* nullable */ java.lang.String getLabelExtractorsOrDefault(
+          java.lang.String key,
+          /* nullable */
+          java.lang.String defaultValue) {
+        if (key == null) {
+          throw new NullPointerException("map key");
         }
-        /**
-         *
-         *
-         * 
-         * Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
-         * identifies which time series should be compared with the threshold.
-         *
-         * The filter is similar to the one that is specified in the
-         * [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
-         * (that call is useful to verify the time series that will be retrieved /
-         * processed). The filter must specify the metric type and the resource
-         * type. Optionally, it can specify resource labels and metric labels.
-         * This field must not exceed 2048 Unicode characters in length.
-         * 

-         *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @param value The bytes for filter to set.
-         * @return This builder for chaining.
-         */
-        public Builder setFilterBytes(com.google.protobuf.ByteString value) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          checkByteStringIsUtf8(value);
-          filter_ = value;
-          bitField0_ |= 0x00000001;
-          onChanged();
-          return this;
+        java.util.Map map =
+            internalGetLabelExtractors().getMap();
+        return map.containsKey(key) ? map.get(key) : defaultValue;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. A map from a label key to an extractor expression, which is
+       * used to extract the value for this label key. Each entry in this map is
+       * a specification for how data should be extracted from log entries that
+       * match `filter`. Each combination of extracted values is treated as a
+       * separate rule for the purposes of triggering notifications. Label keys
+       * and corresponding values can be used in notifications generated by this
+       * condition.
+       *
+       * Please see [the documentation on logs-based metric
+       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+       * for syntax and examples.
+       * 

+       *
+       * map<string, string> label_extractors = 2;
+       */
+      @java.lang.Override
+      public java.lang.String getLabelExtractorsOrThrow(java.lang.String key) {
+        if (key == null) {
+          throw new NullPointerException("map key");
+        }
+        java.util.Map map =
+            internalGetLabelExtractors().getMap();
+        if (!map.containsKey(key)) {
+          throw new java.lang.IllegalArgumentException();
         }
+        return map.get(key);
+      }
 
-        private java.util.List aggregations_ =
-            java.util.Collections.emptyList();
+      private byte memoizedIsInitialized = -1;
 
-        private void ensureAggregationsIsMutable() {
-          if (!((bitField0_ & 0x00000002) != 0)) {
-            aggregations_ =
-                new java.util.ArrayList(aggregations_);
-            bitField0_ |= 0x00000002;
-          }
+      @java.lang.Override
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized == 1) return true;
+        if (isInitialized == 0) return false;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      @java.lang.Override
+      public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 1, filter_);
         }
+        com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
+            output,
+            internalGetLabelExtractors(),
+            LabelExtractorsDefaultEntryHolder.defaultEntry,
+            2);
+        getUnknownFields().writeTo(output);
+      }
 
-        private com.google.protobuf.RepeatedFieldBuilderV3<
-                com.google.monitoring.v3.Aggregation,
-                com.google.monitoring.v3.Aggregation.Builder,
-                com.google.monitoring.v3.AggregationOrBuilder>
-            aggregationsBuilder_;
+      @java.lang.Override
+      public int getSerializedSize() {
+        int size = memoizedSize;
+        if (size != -1) return size;
 
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public java.util.List getAggregationsList() {
-          if (aggregationsBuilder_ == null) {
-            return java.util.Collections.unmodifiableList(aggregations_);
-          } else {
-            return aggregationsBuilder_.getMessageList();
-          }
+        size = 0;
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, filter_);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public int getAggregationsCount() {
-          if (aggregationsBuilder_ == null) {
-            return aggregations_.size();
-          } else {
-            return aggregationsBuilder_.getCount();
-          }
+        for (java.util.Map.Entry entry :
+            internalGetLabelExtractors().getMap().entrySet()) {
+          com.google.protobuf.MapEntry labelExtractors__ =
+              LabelExtractorsDefaultEntryHolder.defaultEntry
+                  .newBuilderForType()
+                  .setKey(entry.getKey())
+                  .setValue(entry.getValue())
+                  .build();
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, labelExtractors__);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public com.google.monitoring.v3.Aggregation getAggregations(int index) {
-          if (aggregationsBuilder_ == null) {
-            return aggregations_.get(index);
-          } else {
-            return aggregationsBuilder_.getMessage(index);
-          }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSize = size;
+        return size;
+      }
+
+      @java.lang.Override
+      public boolean equals(final java.lang.Object obj) {
+        if (obj == this) {
+          return true;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder setAggregations(int index, com.google.monitoring.v3.Aggregation value) {
-          if (aggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureAggregationsIsMutable();
-            aggregations_.set(index, value);
-            onChanged();
-          } else {
-            aggregationsBuilder_.setMessage(index, value);
-          }
-          return this;
+        if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition.LogMatch)) {
+          return super.equals(obj);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder setAggregations(
-            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.set(index, builderForValue.build());
-            onChanged();
-          } else {
-            aggregationsBuilder_.setMessage(index, builderForValue.build());
-          }
-          return this;
+        com.google.monitoring.v3.AlertPolicy.Condition.LogMatch other =
+            (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) obj;
+
+        if (!getFilter().equals(other.getFilter())) return false;
+        if (!internalGetLabelExtractors().equals(other.internalGetLabelExtractors())) return false;
+        if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        return true;
+      }
+
+      @java.lang.Override
+      public int hashCode() {
+        if (memoizedHashCode != 0) {
+          return memoizedHashCode;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder addAggregations(com.google.monitoring.v3.Aggregation value) {
-          if (aggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureAggregationsIsMutable();
-            aggregations_.add(value);
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(value);
-          }
-          return this;
+        int hash = 41;
+        hash = (19 * hash) + getDescriptor().hashCode();
+        hash = (37 * hash) + FILTER_FIELD_NUMBER;
+        hash = (53 * hash) + getFilter().hashCode();
+        if (!internalGetLabelExtractors().getMap().isEmpty()) {
+          hash = (37 * hash) + LABEL_EXTRACTORS_FIELD_NUMBER;
+          hash = (53 * hash) + internalGetLabelExtractors().hashCode();
+        }
+        hash = (29 * hash) + getUnknownFields().hashCode();
+        memoizedHashCode = hash;
+        return hash;
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          com.google.protobuf.ByteString data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          com.google.protobuf.ByteString data,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(byte[] data)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseDelimitedFrom(
+          java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseDelimitedFrom(
+          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      @java.lang.Override
+      public Builder newBuilderForType() {
+        return newBuilder();
+      }
+
+      public static Builder newBuilder() {
+        return DEFAULT_INSTANCE.toBuilder();
+      }
+
+      public static Builder newBuilder(
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch prototype) {
+        return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+      }
+
+      @java.lang.Override
+      public Builder toBuilder() {
+        return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+      }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition type that checks whether a log message in the [scoping
+       * project](https://cloud.google.com/monitoring/api/v3#project_name)
+       * satisfies the given filter. Logs from other projects in the metrics
+       * scope are not evaluated.
+       * 

+       *
+       * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.LogMatch}
+       */
+      public static final class Builder
+          extends com.google.protobuf.GeneratedMessageV3.Builder
+          implements
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_descriptor;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder addAggregations(int index, com.google.monitoring.v3.Aggregation value) {
-          if (aggregationsBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            ensureAggregationsIsMutable();
-            aggregations_.add(index, value);
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(index, value);
+
+        @SuppressWarnings({"rawtypes"})
+        protected com.google.protobuf.MapField internalGetMapField(int number) {
+          switch (number) {
+            case 2:
+              return internalGetLabelExtractors();
+            default:
+              throw new RuntimeException("Invalid map field number: " + number);
           }
-          return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder addAggregations(
-            com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.add(builderForValue.build());
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(builderForValue.build());
+
+        @SuppressWarnings({"rawtypes"})
+        protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+          switch (number) {
+            case 2:
+              return internalGetMutableLabelExtractors();
+            default:
+              throw new RuntimeException("Invalid map field number: " + number);
           }
-          return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder addAggregations(
-            int index, com.google.monitoring.v3.Aggregation.Builder builderForValue) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.add(index, builderForValue.build());
-            onChanged();
-          } else {
-            aggregationsBuilder_.addMessage(index, builderForValue.build());
-          }
-          return this;
+
+        @java.lang.Override
+        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.class,
+                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder.class);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder addAllAggregations(
-            java.lang.Iterable values) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            com.google.protobuf.AbstractMessageLite.Builder.addAll(values, aggregations_);
-            onChanged();
-          } else {
-            aggregationsBuilder_.addAllMessages(values);
-          }
-          return this;
+
+        // Construct using com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.newBuilder()
+        private Builder() {}
+
+        private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+          super(parent);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder clearAggregations() {
-          if (aggregationsBuilder_ == null) {
-            aggregations_ = java.util.Collections.emptyList();
-            bitField0_ = (bitField0_ & ~0x00000002);
-            onChanged();
-          } else {
-            aggregationsBuilder_.clear();
-          }
+
+        @java.lang.Override
+        public Builder clear() {
+          super.clear();
+          bitField0_ = 0;
+          filter_ = "";
+          internalGetMutableLabelExtractors().clear();
           return this;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public Builder removeAggregations(int index) {
-          if (aggregationsBuilder_ == null) {
-            ensureAggregationsIsMutable();
-            aggregations_.remove(index);
-            onChanged();
-          } else {
-            aggregationsBuilder_.remove(index);
-          }
-          return this;
+
+        @java.lang.Override
+        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_descriptor;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public com.google.monitoring.v3.Aggregation.Builder getAggregationsBuilder(int index) {
-          return getAggregationsFieldBuilder().getBuilder(index);
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getDefaultInstanceForType() {
+          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch build() {
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch result = buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public com.google.monitoring.v3.AggregationOrBuilder getAggregationsOrBuilder(int index) {
-          if (aggregationsBuilder_ == null) {
-            return aggregations_.get(index);
-          } else {
-            return aggregationsBuilder_.getMessageOrBuilder(index);
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch buildPartial() {
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch result =
+              new com.google.monitoring.v3.AlertPolicy.Condition.LogMatch(this);
+          if (bitField0_ != 0) {
+            buildPartial0(result);
           }
+          onBuilt();
+          return result;
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public java.util.List
-            getAggregationsOrBuilderList() {
-          if (aggregationsBuilder_ != null) {
-            return aggregationsBuilder_.getMessageOrBuilderList();
-          } else {
-            return java.util.Collections.unmodifiableList(aggregations_);
+
+        private void buildPartial0(com.google.monitoring.v3.AlertPolicy.Condition.LogMatch result) {
+          int from_bitField0_ = bitField0_;
+          if (((from_bitField0_ & 0x00000001) != 0)) {
+            result.filter_ = filter_;
+          }
+          if (((from_bitField0_ & 0x00000002) != 0)) {
+            result.labelExtractors_ = internalGetLabelExtractors();
+            result.labelExtractors_.makeImmutable();
           }
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder() {
-          return getAggregationsFieldBuilder()
-              .addBuilder(com.google.monitoring.v3.Aggregation.getDefaultInstance());
+
+        @java.lang.Override
+        public Builder clone() {
+          return super.clone();
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public com.google.monitoring.v3.Aggregation.Builder addAggregationsBuilder(int index) {
-          return getAggregationsFieldBuilder()
-              .addBuilder(index, com.google.monitoring.v3.Aggregation.getDefaultInstance());
+
+        @java.lang.Override
+        public Builder setField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.setField(field, value);
         }
-        /**
-         *
-         *
-         * 
-         * Specifies the alignment of data points in individual time series as
-         * well as how to combine the retrieved time series together (such as
-         * when aggregating multiple streams on each resource to a single
-         * stream for each resource or when aggregating streams across all
-         * members of a group of resources). Multiple aggregations
-         * are applied in the order specified.
-         *
-         * This field is similar to the one in the [`ListTimeSeries`
-         * request](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
-         * It is advisable to use the `ListTimeSeries` method when debugging this
-         * field.
-         * 

-         *
-         * repeated .google.monitoring.v3.Aggregation aggregations = 5;
-         */
-        public java.util.List
-            getAggregationsBuilderList() {
-          return getAggregationsFieldBuilder().getBuilderList();
+
+        @java.lang.Override
+        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+          return super.clearField(field);
         }
 
-        private com.google.protobuf.RepeatedFieldBuilderV3<
-                com.google.monitoring.v3.Aggregation,
-                com.google.monitoring.v3.Aggregation.Builder,
-                com.google.monitoring.v3.AggregationOrBuilder>
-            getAggregationsFieldBuilder() {
-          if (aggregationsBuilder_ == null) {
-            aggregationsBuilder_ =
-                new com.google.protobuf.RepeatedFieldBuilderV3<
-                    com.google.monitoring.v3.Aggregation,
-                    com.google.monitoring.v3.Aggregation.Builder,
-                    com.google.monitoring.v3.AggregationOrBuilder>(
-                    aggregations_,
-                    ((bitField0_ & 0x00000002) != 0),
-                    getParentForChildren(),
-                    isClean());
-            aggregations_ = null;
-          }
-          return aggregationsBuilder_;
+        @java.lang.Override
+        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+          return super.clearOneof(oneof);
         }
 
-        private com.google.protobuf.Duration duration_;
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.protobuf.Duration,
-                com.google.protobuf.Duration.Builder,
-                com.google.protobuf.DurationOrBuilder>
-            durationBuilder_;
-        /**
-         *
-         *
-         * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
-         * 

-         *
-         * .google.protobuf.Duration duration = 2;
-         *
-         * @return Whether the duration field is set.
-         */
-        public boolean hasDuration() {
-          return ((bitField0_ & 0x00000004) != 0);
+        @java.lang.Override
+        public Builder setRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field,
+            int index,
+            java.lang.Object value) {
+          return super.setRepeatedField(field, index, value);
         }
-        /**
-         *
-         *
-         * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
-         * 

-         *
-         * .google.protobuf.Duration duration = 2;
-         *
-         * @return The duration.
-         */
-        public com.google.protobuf.Duration getDuration() {
-          if (durationBuilder_ == null) {
-            return duration_ == null
-                ? com.google.protobuf.Duration.getDefaultInstance()
-                : duration_;
-          } else {
-            return durationBuilder_.getMessage();
-          }
+
+        @java.lang.Override
+        public Builder addRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.addRepeatedField(field, value);
         }
-        /**
-         *
-         *
-         * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
-         * 

-         *
-         * .google.protobuf.Duration duration = 2;
-         */
-        public Builder setDuration(com.google.protobuf.Duration value) {
-          if (durationBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            duration_ = value;
+
+        @java.lang.Override
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) {
+            return mergeFrom((com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) other);
           } else {
-            durationBuilder_.setMessage(value);
+            super.mergeFrom(other);
+            return this;
           }
-          bitField0_ |= 0x00000004;
-          onChanged();
-          return this;
         }
-        /**
-         *
-         *
-         * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
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-         * 

-         *
-         * .google.protobuf.Duration duration = 2;
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-        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
-          if (durationBuilder_ == null) {
-            duration_ = builderForValue.build();
-          } else {
-            durationBuilder_.setMessage(builderForValue.build());
+
+        public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.Condition.LogMatch other) {
+          if (other == com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance())
+            return this;
+          if (!other.getFilter().isEmpty()) {
+            filter_ = other.filter_;
+            bitField0_ |= 0x00000001;
+            onChanged();
           }
-          bitField0_ |= 0x00000004;
+          internalGetMutableLabelExtractors().mergeFrom(other.internalGetLabelExtractors());
+          bitField0_ |= 0x00000002;
+          this.mergeUnknownFields(other.getUnknownFields());
           onChanged();
           return this;
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-        /**
-         *
-         *
-         * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
-         * 

-         *
-         * .google.protobuf.Duration duration = 2;
-         */
-        public Builder mergeDuration(com.google.protobuf.Duration value) {
-          if (durationBuilder_ == null) {
-            if (((bitField0_ & 0x00000004) != 0)
-                && duration_ != null
-                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
-              getDurationBuilder().mergeFrom(value);
-            } else {
-              duration_ = value;
-            }
-          } else {
-            durationBuilder_.mergeFrom(value);
+
+        @java.lang.Override
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          if (extensionRegistry == null) {
+            throw new java.lang.NullPointerException();
           }
-          bitField0_ |= 0x00000004;
-          onChanged();
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                case 10:
+                  {
+                    filter_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000001;
+                    break;
+                  } // case 10
+                case 18:
+                  {
+                    com.google.protobuf.MapEntry
+                        labelExtractors__ =
+                            input.readMessage(
+                                LabelExtractorsDefaultEntryHolder.defaultEntry.getParserForType(),
+                                extensionRegistry);
+                    internalGetMutableLabelExtractors()
+                        .getMutableMap()
+                        .put(labelExtractors__.getKey(), labelExtractors__.getValue());
+                    bitField0_ |= 0x00000002;
+                    break;
+                  } // case 18
+                default:
+                  {
+                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                      done = true; // was an endgroup tag
+                    }
+                    break;
+                  } // default:
+              } // switch (tag)
+            } // while (!done)
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.unwrapIOException();
+          } finally {
+            onChanged();
+          } // finally
           return this;
         }
+
+        private int bitField0_;
+
+        private java.lang.Object filter_ = "";
         /**
          *
          *
          * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
+         * Required. A logs-based filter. See [Advanced Logs
+         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+         * for how this filter should be constructed.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @return The filter.
          */
-        public Builder clearDuration() {
-          bitField0_ = (bitField0_ & ~0x00000004);
-          duration_ = null;
-          if (durationBuilder_ != null) {
-            durationBuilder_.dispose();
-            durationBuilder_ = null;
+        public java.lang.String getFilter() {
+          java.lang.Object ref = filter_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            filter_ = s;
+            return s;
+          } else {
+            return (java.lang.String) ref;
           }
-          onChanged();
-          return this;
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
+         * Required. A logs-based filter. See [Advanced Logs
+         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+         * for how this filter should be constructed.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
-         */
-        public com.google.protobuf.Duration.Builder getDurationBuilder() {
-          bitField0_ |= 0x00000004;
-          onChanged();
-          return getDurationFieldBuilder().getBuilder();
-        }
-        /**
-         *
-         *
-         * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
-         * 

+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
          *
-         * .google.protobuf.Duration duration = 2;
+         * @return The bytes for filter.
          */
-        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
-          if (durationBuilder_ != null) {
-            return durationBuilder_.getMessageOrBuilder();
+        public com.google.protobuf.ByteString getFilterBytes() {
+          java.lang.Object ref = filter_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            filter_ = b;
+            return b;
           } else {
-            return duration_ == null
-                ? com.google.protobuf.Duration.getDefaultInstance()
-                : duration_;
+            return (com.google.protobuf.ByteString) ref;
           }
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must fail to report new
-         * data to be considered failing. The minimum value of this field
-         * is 120 seconds. Larger values that are a multiple of a
-         * minute--for example, 240 or 300 seconds--are supported.
-         * If an invalid value is given, an
-         * error will be returned. The `Duration.nanos` field is
-         * ignored.
+         * Required. A logs-based filter. See [Advanced Logs
+         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+         * for how this filter should be constructed.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         *
+         * @param value The filter to set.
+         * @return This builder for chaining.
          */
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.protobuf.Duration,
-                com.google.protobuf.Duration.Builder,
-                com.google.protobuf.DurationOrBuilder>
-            getDurationFieldBuilder() {
-          if (durationBuilder_ == null) {
-            durationBuilder_ =
-                new com.google.protobuf.SingleFieldBuilderV3<
-                    com.google.protobuf.Duration,
-                    com.google.protobuf.Duration.Builder,
-                    com.google.protobuf.DurationOrBuilder>(
-                    getDuration(), getParentForChildren(), isClean());
-            duration_ = null;
+        public Builder setFilter(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
           }
-          return durationBuilder_;
+          filter_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
         }
-
-        private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
-            triggerBuilder_;
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Required. A logs-based filter. See [Advanced Logs
+         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+         * for how this filter should be constructed.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
          *
-         * @return Whether the trigger field is set.
+         * @return This builder for chaining.
          */
-        public boolean hasTrigger() {
-          return ((bitField0_ & 0x00000008) != 0);
+        public Builder clearFilter() {
+          filter_ = getDefaultInstance().getFilter();
+          bitField0_ = (bitField0_ & ~0x00000001);
+          onChanged();
+          return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Required. A logs-based filter. See [Advanced Logs
+         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
+         * for how this filter should be constructed.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
          *
-         * @return The trigger.
+         * @param value The bytes for filter to set.
+         * @return This builder for chaining.
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
-          if (triggerBuilder_ == null) {
-            return trigger_ == null
-                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-                : trigger_;
-          } else {
-            return triggerBuilder_.getMessage();
+        public Builder setFilterBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          filter_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+
+        private com.google.protobuf.MapField labelExtractors_;
+
+        private com.google.protobuf.MapField
+            internalGetLabelExtractors() {
+          if (labelExtractors_ == null) {
+            return com.google.protobuf.MapField.emptyMapField(
+                LabelExtractorsDefaultEntryHolder.defaultEntry);
           }
+          return labelExtractors_;
+        }
+
+        private com.google.protobuf.MapField
+            internalGetMutableLabelExtractors() {
+          if (labelExtractors_ == null) {
+            labelExtractors_ =
+                com.google.protobuf.MapField.newMapField(
+                    LabelExtractorsDefaultEntryHolder.defaultEntry);
+          }
+          if (!labelExtractors_.isMutable()) {
+            labelExtractors_ = labelExtractors_.copy();
+          }
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return labelExtractors_;
+        }
+
+        public int getLabelExtractorsCount() {
+          return internalGetLabelExtractors().getMap().size();
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
-          if (triggerBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            trigger_ = value;
-          } else {
-            triggerBuilder_.setMessage(value);
+        @java.lang.Override
+        public boolean containsLabelExtractors(java.lang.String key) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
-          bitField0_ |= 0x00000008;
-          onChanged();
-          return this;
+          return internalGetLabelExtractors().getMap().containsKey(key);
+        }
+        /** Use {@link #getLabelExtractorsMap()} instead. */
+        @java.lang.Override
+        @java.lang.Deprecated
+        public java.util.Map getLabelExtractors() {
+          return getLabelExtractorsMap();
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        public Builder setTrigger(
-            com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder builderForValue) {
-          if (triggerBuilder_ == null) {
-            trigger_ = builderForValue.build();
-          } else {
-            triggerBuilder_.setMessage(builderForValue.build());
-          }
-          bitField0_ |= 0x00000008;
-          onChanged();
-          return this;
+        @java.lang.Override
+        public java.util.Map getLabelExtractorsMap() {
+          return internalGetLabelExtractors().getMap();
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        public Builder mergeTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
-          if (triggerBuilder_ == null) {
-            if (((bitField0_ & 0x00000008) != 0)
-                && trigger_ != null
-                && trigger_
-                    != com.google.monitoring.v3.AlertPolicy.Condition.Trigger
-                        .getDefaultInstance()) {
-              getTriggerBuilder().mergeFrom(value);
-            } else {
-              trigger_ = value;
-            }
-          } else {
-            triggerBuilder_.mergeFrom(value);
+        @java.lang.Override
+        public /* nullable */ java.lang.String getLabelExtractorsOrDefault(
+            java.lang.String key,
+            /* nullable */
+            java.lang.String defaultValue) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
-          bitField0_ |= 0x00000008;
-          onChanged();
-          return this;
+          java.util.Map map =
+              internalGetLabelExtractors().getMap();
+          return map.containsKey(key) ? map.get(key) : defaultValue;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        public Builder clearTrigger() {
-          bitField0_ = (bitField0_ & ~0x00000008);
-          trigger_ = null;
-          if (triggerBuilder_ != null) {
-            triggerBuilder_.dispose();
-            triggerBuilder_ = null;
+        @java.lang.Override
+        public java.lang.String getLabelExtractorsOrThrow(java.lang.String key) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
-          onChanged();
+          java.util.Map map =
+              internalGetLabelExtractors().getMap();
+          if (!map.containsKey(key)) {
+            throw new java.lang.IllegalArgumentException();
+          }
+          return map.get(key);
+        }
+
+        public Builder clearLabelExtractors() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          internalGetMutableLabelExtractors().getMutableMap().clear();
           return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder getTriggerBuilder() {
-          bitField0_ |= 0x00000008;
-          onChanged();
-          return getTriggerFieldBuilder().getBuilder();
+        public Builder removeLabelExtractors(java.lang.String key) {
+          if (key == null) {
+            throw new NullPointerException("map key");
+          }
+          internalGetMutableLabelExtractors().getMutableMap().remove(key);
+          return this;
+        }
+        /** Use alternate mutation accessors instead. */
+        @java.lang.Deprecated
+        public java.util.Map getMutableLabelExtractors() {
+          bitField0_ |= 0x00000002;
+          return internalGetMutableLabelExtractors().getMutableMap();
         }
         /**
          *
          *
-         * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * 
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder
-            getTriggerOrBuilder() {
-          if (triggerBuilder_ != null) {
-            return triggerBuilder_.getMessageOrBuilder();
-          } else {
-            return trigger_ == null
-                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-                : trigger_;
+        public Builder putLabelExtractors(java.lang.String key, java.lang.String value) {
+          if (key == null) {
+            throw new NullPointerException("map key");
+          }
+          if (value == null) {
+            throw new NullPointerException("map value");
           }
+          internalGetMutableLabelExtractors().getMutableMap().put(key, value);
+          bitField0_ |= 0x00000002;
+          return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`.
+         * Optional. A map from a label key to an extractor expression, which is
+         * used to extract the value for this label key. Each entry in this map is
+         * a specification for how data should be extracted from log entries that
+         * match `filter`. Each combination of extracted values is treated as a
+         * separate rule for the purposes of triggering notifications. Label keys
+         * and corresponding values can be used in notifications generated by this
+         * condition.
+         *
+         * Please see [the documentation on logs-based metric
+         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
+         * for syntax and examples.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> label_extractors = 2;
          */
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
-            getTriggerFieldBuilder() {
-          if (triggerBuilder_ == null) {
-            triggerBuilder_ =
-                new com.google.protobuf.SingleFieldBuilderV3<
-                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                    com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>(
-                    getTrigger(), getParentForChildren(), isClean());
-            trigger_ = null;
-          }
-          return triggerBuilder_;
+        public Builder putAllLabelExtractors(
+            java.util.Map values) {
+          internalGetMutableLabelExtractors().getMutableMap().putAll(values);
+          bitField0_ |= 0x00000002;
+          return this;
         }
 
         @java.lang.Override
@@ -8800,26 +11703,24 @@ public final Builder mergeUnknownFields(
           return super.mergeUnknownFields(unknownFields);
         }
 
-        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
       }
 
-      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MetricAbsence)
-      private static final com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
-          DEFAULT_INSTANCE;
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
+      private static final com.google.monitoring.v3.AlertPolicy.Condition.LogMatch DEFAULT_INSTANCE;
 
       static {
-        DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence();
+        DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition.LogMatch();
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
-          getDefaultInstance() {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getDefaultInstance() {
         return DEFAULT_INSTANCE;
       }
 
-      private static final com.google.protobuf.Parser PARSER =
-          new com.google.protobuf.AbstractParser() {
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
             @java.lang.Override
-            public MetricAbsence parsePartialFrom(
+            public LogMatch parsePartialFrom(
                 com.google.protobuf.CodedInputStream input,
                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                 throws com.google.protobuf.InvalidProtocolBufferException {
@@ -8839,248 +11740,273 @@ public MetricAbsence parsePartialFrom(
             }
           };
 
-      public static com.google.protobuf.Parser parser() {
+      public static com.google.protobuf.Parser parser() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.protobuf.Parser getParserForType() {
+      public com.google.protobuf.Parser getParserForType() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
-          getDefaultInstanceForType() {
+      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getDefaultInstanceForType() {
         return DEFAULT_INSTANCE;
       }
     }
 
-    public interface LogMatchOrBuilder
+    public interface MonitoringQueryLanguageConditionOrBuilder
         extends
-        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
+        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
         com.google.protobuf.MessageOrBuilder {
 
       /**
        *
        *
        * 
-       * Required. A logs-based filter. See [Advanced Logs
-       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-       * for how this filter should be constructed.
+       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+       * query that outputs a boolean stream.
        * 

        *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       * string query = 1;
        *
-       * @return The filter.
+       * @return The query.
        */
-      java.lang.String getFilter();
+      java.lang.String getQuery();
       /**
        *
        *
        * 
-       * Required. A logs-based filter. See [Advanced Logs
-       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-       * for how this filter should be constructed.
+       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+       * query that outputs a boolean stream.
        * 

        *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       * string query = 1;
        *
-       * @return The bytes for filter.
+       * @return The bytes for query.
        */
-      com.google.protobuf.ByteString getFilterBytes();
+      com.google.protobuf.ByteString getQueryBytes();
 
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
-       *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return Whether the duration field is set.
        */
-      int getLabelExtractorsCount();
+      boolean hasDuration();
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

        *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return The duration.
+       */
+      com.google.protobuf.Duration getDuration();
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * .google.protobuf.Duration duration = 2;
        */
-      boolean containsLabelExtractors(java.lang.String key);
-      /** Use {@link #getLabelExtractorsMap()} instead. */
-      @java.lang.Deprecated
-      java.util.Map getLabelExtractors();
+      com.google.protobuf.DurationOrBuilder getDurationOrBuilder();
+
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
+       * 

        *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return Whether the trigger field is set.
+       */
+      boolean hasTrigger();
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return The trigger.
        */
-      java.util.Map getLabelExtractorsMap();
+      com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger();
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
+       * 

        *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       */
+      com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder();
+
+      /**
+       *
+       *
+       * 
+       * A condition control that determines how metric-threshold conditions
+       * are evaluated when data stops arriving.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+       * 
+       *
+       * @return The enum numeric value on the wire for evaluationMissingData.
        */
-      /* nullable */
-      java.lang.String getLabelExtractorsOrDefault(
-          java.lang.String key,
-          /* nullable */
-          java.lang.String defaultValue);
+      int getEvaluationMissingDataValue();
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
-       *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * A condition control that determines how metric-threshold conditions
+       * are evaluated when data stops arriving.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+       * 
+       *
+       * @return The evaluationMissingData.
        */
-      java.lang.String getLabelExtractorsOrThrow(java.lang.String key);
+      com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+          getEvaluationMissingData();
     }
     /**
      *
      *
      * 
-     * A condition type that checks whether a log message in the [scoping
-     * project](https://cloud.google.com/monitoring/api/v3#project_name)
-     * satisfies the given filter. Logs from other projects in the metrics
-     * scope are not evaluated.
+     * A condition type that allows alert policies to be defined using
+     * [Monitoring Query Language](https://cloud.google.com/monitoring/mql).
      * 

      *
-     * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.LogMatch}
+     * Protobuf type {@code
+     * google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition}
      */
-    public static final class LogMatch extends com.google.protobuf.GeneratedMessageV3
+    public static final class MonitoringQueryLanguageCondition
+        extends com.google.protobuf.GeneratedMessageV3
         implements
-        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
-        LogMatchOrBuilder {
+        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+        MonitoringQueryLanguageConditionOrBuilder {
       private static final long serialVersionUID = 0L;
-      // Use LogMatch.newBuilder() to construct.
-      private LogMatch(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+      // Use MonitoringQueryLanguageCondition.newBuilder() to construct.
+      private MonitoringQueryLanguageCondition(
+          com.google.protobuf.GeneratedMessageV3.Builder builder) {
         super(builder);
       }
 
-      private LogMatch() {
-        filter_ = "";
+      private MonitoringQueryLanguageCondition() {
+        query_ = "";
+        evaluationMissingData_ = 0;
       }
 
       @java.lang.Override
       @SuppressWarnings({"unused"})
       protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
-        return new LogMatch();
+        return new MonitoringQueryLanguageCondition();
       }
 
       public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
         return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_descriptor;
-      }
-
-      @SuppressWarnings({"rawtypes"})
-      @java.lang.Override
-      protected com.google.protobuf.MapField internalGetMapField(int number) {
-        switch (number) {
-          case 2:
-            return internalGetLabelExtractors();
-          default:
-            throw new RuntimeException("Invalid map field number: " + number);
-        }
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor;
       }
 
       @java.lang.Override
       protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
           internalGetFieldAccessorTable() {
         return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_fieldAccessorTable
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_fieldAccessorTable
             .ensureFieldAccessorsInitialized(
-                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.class,
-                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder.class);
+                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                    .class,
+                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                    .Builder.class);
       }
 
-      public static final int FILTER_FIELD_NUMBER = 1;
+      public static final int QUERY_FIELD_NUMBER = 1;
 
       @SuppressWarnings("serial")
-      private volatile java.lang.Object filter_ = "";
+      private volatile java.lang.Object query_ = "";
       /**
        *
        *
        * 
-       * Required. A logs-based filter. See [Advanced Logs
-       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-       * for how this filter should be constructed.
+       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+       * query that outputs a boolean stream.
        * 

        *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       * string query = 1;
        *
-       * @return The filter.
+       * @return The query.
        */
       @java.lang.Override
-      public java.lang.String getFilter() {
-        java.lang.Object ref = filter_;
+      public java.lang.String getQuery() {
+        java.lang.Object ref = query_;
         if (ref instanceof java.lang.String) {
           return (java.lang.String) ref;
         } else {
           com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
           java.lang.String s = bs.toStringUtf8();
-          filter_ = s;
+          query_ = s;
           return s;
         }
       }
@@ -9088,172 +12014,208 @@ public java.lang.String getFilter() {
        *
        *
        * 
-       * Required. A logs-based filter. See [Advanced Logs
-       * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-       * for how this filter should be constructed.
+       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+       * query that outputs a boolean stream.
        * 

        *
-       * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+       * string query = 1;
        *
-       * @return The bytes for filter.
+       * @return The bytes for query.
        */
       @java.lang.Override
-      public com.google.protobuf.ByteString getFilterBytes() {
-        java.lang.Object ref = filter_;
+      public com.google.protobuf.ByteString getQueryBytes() {
+        java.lang.Object ref = query_;
         if (ref instanceof java.lang.String) {
           com.google.protobuf.ByteString b =
               com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-          filter_ = b;
+          query_ = b;
           return b;
         } else {
           return (com.google.protobuf.ByteString) ref;
         }
       }
 
-      public static final int LABEL_EXTRACTORS_FIELD_NUMBER = 2;
-
-      private static final class LabelExtractorsDefaultEntryHolder {
-        static final com.google.protobuf.MapEntry defaultEntry =
-            com.google.protobuf.MapEntry.newDefaultInstance(
-                com.google.monitoring.v3.AlertProto
-                    .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_LabelExtractorsEntry_descriptor,
-                com.google.protobuf.WireFormat.FieldType.STRING,
-                "",
-                com.google.protobuf.WireFormat.FieldType.STRING,
-                "");
+      public static final int DURATION_FIELD_NUMBER = 2;
+      private com.google.protobuf.Duration duration_;
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return Whether the duration field is set.
+       */
+      @java.lang.Override
+      public boolean hasDuration() {
+        return duration_ != null;
       }
-
-      @SuppressWarnings("serial")
-      private com.google.protobuf.MapField labelExtractors_;
-
-      private com.google.protobuf.MapField
-          internalGetLabelExtractors() {
-        if (labelExtractors_ == null) {
-          return com.google.protobuf.MapField.emptyMapField(
-              LabelExtractorsDefaultEntryHolder.defaultEntry);
-        }
-        return labelExtractors_;
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       *
+       * @return The duration.
+       */
+      @java.lang.Override
+      public com.google.protobuf.Duration getDuration() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
       }
-
-      public int getLabelExtractorsCount() {
-        return internalGetLabelExtractors().getMap().size();
+      /**
+       *
+       *
+       * 
+       * The amount of time that a time series must violate the
+       * threshold to be considered failing. Currently, only values
+       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+       * seconds--are supported. If an invalid value is given, an
+       * error will be returned. When choosing a duration, it is useful to
+       * keep in mind the frequency of the underlying time series data
+       * (which may also be affected by any alignments specified in the
+       * `aggregations` field); a good duration is long enough so that a single
+       * outlier does not generate spurious alerts, but short enough that
+       * unhealthy states are detected and alerted on quickly.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2;
+       */
+      @java.lang.Override
+      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
       }
+
+      public static final int TRIGGER_FIELD_NUMBER = 3;
+      private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
+       * 

        *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return Whether the trigger field is set.
+       */
+      @java.lang.Override
+      public boolean hasTrigger() {
+        return trigger_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       *
+       * @return The trigger.
        */
       @java.lang.Override
-      public boolean containsLabelExtractors(java.lang.String key) {
-        if (key == null) {
-          throw new NullPointerException("map key");
-        }
-        return internalGetLabelExtractors().getMap().containsKey(key);
-      }
-      /** Use {@link #getLabelExtractorsMap()} instead. */
-      @java.lang.Override
-      @java.lang.Deprecated
-      public java.util.Map getLabelExtractors() {
-        return getLabelExtractorsMap();
+      public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
+        return trigger_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+            : trigger_;
       }
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
-       *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * The number/percent of time series for which the comparison must hold
+       * in order for the condition to trigger. If unspecified, then the
+       * condition will trigger if the comparison is true for any of the
+       * time series that have been identified by `filter` and `aggregations`,
+       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+       * are specified.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
        */
       @java.lang.Override
-      public java.util.Map getLabelExtractorsMap() {
-        return internalGetLabelExtractors().getMap();
+      public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder() {
+        return trigger_ == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+            : trigger_;
       }
+
+      public static final int EVALUATION_MISSING_DATA_FIELD_NUMBER = 4;
+      private int evaluationMissingData_ = 0;
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
-       *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * A condition control that determines how metric-threshold conditions
+       * are evaluated when data stops arriving.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+       * 
+       *
+       * @return The enum numeric value on the wire for evaluationMissingData.
        */
       @java.lang.Override
-      public /* nullable */ java.lang.String getLabelExtractorsOrDefault(
-          java.lang.String key,
-          /* nullable */
-          java.lang.String defaultValue) {
-        if (key == null) {
-          throw new NullPointerException("map key");
-        }
-        java.util.Map map =
-            internalGetLabelExtractors().getMap();
-        return map.containsKey(key) ? map.get(key) : defaultValue;
+      public int getEvaluationMissingDataValue() {
+        return evaluationMissingData_;
       }
       /**
        *
        *
        * 
-       * Optional. A map from a label key to an extractor expression, which is
-       * used to extract the value for this label key. Each entry in this map is
-       * a specification for how data should be extracted from log entries that
-       * match `filter`. Each combination of extracted values is treated as a
-       * separate rule for the purposes of triggering notifications. Label keys
-       * and corresponding values can be used in notifications generated by this
-       * condition.
-       *
-       * Please see [the documentation on logs-based metric
-       * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-       * for syntax and examples.
+       * A condition control that determines how metric-threshold conditions
+       * are evaluated when data stops arriving.
        * 

        *
-       * map<string, string> label_extractors = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+       * 
+       *
+       * @return The evaluationMissingData.
        */
       @java.lang.Override
-      public java.lang.String getLabelExtractorsOrThrow(java.lang.String key) {
-        if (key == null) {
-          throw new NullPointerException("map key");
-        }
-        java.util.Map map =
-            internalGetLabelExtractors().getMap();
-        if (!map.containsKey(key)) {
-          throw new java.lang.IllegalArgumentException();
-        }
-        return map.get(key);
+      public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+          getEvaluationMissingData() {
+        com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
+            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
+                evaluationMissingData_);
+        return result == null
+            ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
+            : result;
       }
 
       private byte memoizedIsInitialized = -1;
@@ -9270,14 +12232,21 @@ public final boolean isInitialized() {
 
       @java.lang.Override
       public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
-          com.google.protobuf.GeneratedMessageV3.writeString(output, 1, filter_);
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(query_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 1, query_);
+        }
+        if (duration_ != null) {
+          output.writeMessage(2, getDuration());
+        }
+        if (trigger_ != null) {
+          output.writeMessage(3, getTrigger());
+        }
+        if (evaluationMissingData_
+            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+                .EVALUATION_MISSING_DATA_UNSPECIFIED
+                .getNumber()) {
+          output.writeEnum(4, evaluationMissingData_);
         }
-        com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
-            output,
-            internalGetLabelExtractors(),
-            LabelExtractorsDefaultEntryHolder.defaultEntry,
-            2);
         getUnknownFields().writeTo(output);
       }
 
@@ -9287,18 +12256,20 @@ public int getSerializedSize() {
         if (size != -1) return size;
 
         size = 0;
-        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
-          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, filter_);
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(query_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, query_);
         }
-        for (java.util.Map.Entry entry :
-            internalGetLabelExtractors().getMap().entrySet()) {
-          com.google.protobuf.MapEntry labelExtractors__ =
-              LabelExtractorsDefaultEntryHolder.defaultEntry
-                  .newBuilderForType()
-                  .setKey(entry.getKey())
-                  .setValue(entry.getValue())
-                  .build();
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, labelExtractors__);
+        if (duration_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getDuration());
+        }
+        if (trigger_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getTrigger());
+        }
+        if (evaluationMissingData_
+            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+                .EVALUATION_MISSING_DATA_UNSPECIFIED
+                .getNumber()) {
+          size += com.google.protobuf.CodedOutputStream.computeEnumSize(4, evaluationMissingData_);
         }
         size += getUnknownFields().getSerializedSize();
         memoizedSize = size;
@@ -9310,14 +12281,24 @@ public boolean equals(final java.lang.Object obj) {
         if (obj == this) {
           return true;
         }
-        if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition.LogMatch)) {
+        if (!(obj
+            instanceof
+            com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)) {
           return super.equals(obj);
         }
-        com.google.monitoring.v3.AlertPolicy.Condition.LogMatch other =
-            (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) obj;
+        com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition other =
+            (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition) obj;
 
-        if (!getFilter().equals(other.getFilter())) return false;
-        if (!internalGetLabelExtractors().equals(other.internalGetLabelExtractors())) return false;
+        if (!getQuery().equals(other.getQuery())) return false;
+        if (hasDuration() != other.hasDuration()) return false;
+        if (hasDuration()) {
+          if (!getDuration().equals(other.getDuration())) return false;
+        }
+        if (hasTrigger() != other.hasTrigger()) return false;
+        if (hasTrigger()) {
+          if (!getTrigger().equals(other.getTrigger())) return false;
+        }
+        if (evaluationMissingData_ != other.evaluationMissingData_) return false;
         if (!getUnknownFields().equals(other.getUnknownFields())) return false;
         return true;
       }
@@ -9329,85 +12310,99 @@ public int hashCode() {
         }
         int hash = 41;
         hash = (19 * hash) + getDescriptor().hashCode();
-        hash = (37 * hash) + FILTER_FIELD_NUMBER;
-        hash = (53 * hash) + getFilter().hashCode();
-        if (!internalGetLabelExtractors().getMap().isEmpty()) {
-          hash = (37 * hash) + LABEL_EXTRACTORS_FIELD_NUMBER;
-          hash = (53 * hash) + internalGetLabelExtractors().hashCode();
+        hash = (37 * hash) + QUERY_FIELD_NUMBER;
+        hash = (53 * hash) + getQuery().hashCode();
+        if (hasDuration()) {
+          hash = (37 * hash) + DURATION_FIELD_NUMBER;
+          hash = (53 * hash) + getDuration().hashCode();
+        }
+        if (hasTrigger()) {
+          hash = (37 * hash) + TRIGGER_FIELD_NUMBER;
+          hash = (53 * hash) + getTrigger().hashCode();
         }
+        hash = (37 * hash) + EVALUATION_MISSING_DATA_FIELD_NUMBER;
+        hash = (53 * hash) + evaluationMissingData_;
         hash = (29 * hash) + getUnknownFields().hashCode();
         memoizedHashCode = hash;
         return hash;
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          java.nio.ByteBuffer data) throws com.google.protobuf.InvalidProtocolBufferException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(java.nio.ByteBuffer data)
+              throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(
+              java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          com.google.protobuf.ByteString data)
-          throws com.google.protobuf.InvalidProtocolBufferException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(com.google.protobuf.ByteString data)
+              throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          com.google.protobuf.ByteString data,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(
+              com.google.protobuf.ByteString data,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(byte[] data)
-          throws com.google.protobuf.InvalidProtocolBufferException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws com.google.protobuf.InvalidProtocolBufferException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          java.io.InputStream input) throws java.io.IOException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(java.io.InputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(
+              java.io.InputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
             PARSER, input, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseDelimitedFrom(
-          java.io.InputStream input) throws java.io.IOException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseDelimitedFrom(
-          java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseDelimitedFrom(
+              java.io.InputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
             PARSER, input, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(com.google.protobuf.CodedInputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch parseFrom(
-          com.google.protobuf.CodedInputStream input,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          parseFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
             PARSER, input, extensionRegistry);
       }
@@ -9422,7 +12417,8 @@ public static Builder newBuilder() {
       }
 
       public static Builder newBuilder(
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch prototype) {
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+              prototype) {
         return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
       }
 
@@ -9441,55 +12437,37 @@ protected Builder newBuilderForType(
        *
        *
        * 
-       * A condition type that checks whether a log message in the [scoping
-       * project](https://cloud.google.com/monitoring/api/v3#project_name)
-       * satisfies the given filter. Logs from other projects in the metrics
-       * scope are not evaluated.
+       * A condition type that allows alert policies to be defined using
+       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql).
        * 

        *
-       * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition.LogMatch}
+       * Protobuf type {@code
+       * google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition}
        */
       public static final class Builder
           extends com.google.protobuf.GeneratedMessageV3.Builder
           implements
-          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder {
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageConditionOrBuilder {
         public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_descriptor;
-        }
-
-        @SuppressWarnings({"rawtypes"})
-        protected com.google.protobuf.MapField internalGetMapField(int number) {
-          switch (number) {
-            case 2:
-              return internalGetLabelExtractors();
-            default:
-              throw new RuntimeException("Invalid map field number: " + number);
-          }
-        }
-
-        @SuppressWarnings({"rawtypes"})
-        protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
-          switch (number) {
-            case 2:
-              return internalGetMutableLabelExtractors();
-            default:
-              throw new RuntimeException("Invalid map field number: " + number);
-          }
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor;
         }
 
         @java.lang.Override
         protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
             internalGetFieldAccessorTable() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_fieldAccessorTable
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_fieldAccessorTable
               .ensureFieldAccessorsInitialized(
-                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.class,
-                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder.class);
+                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                      .class,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                      .Builder.class);
         }
 
-        // Construct using com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.newBuilder()
+        // Construct using
+        // com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition.newBuilder()
         private Builder() {}
 
         private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
@@ -9500,241 +12478,687 @@ private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
         public Builder clear() {
           super.clear();
           bitField0_ = 0;
-          filter_ = "";
-          internalGetMutableLabelExtractors().clear();
+          query_ = "";
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
+          }
+          trigger_ = null;
+          if (triggerBuilder_ != null) {
+            triggerBuilder_.dispose();
+            triggerBuilder_ = null;
+          }
+          evaluationMissingData_ = 0;
           return this;
         }
 
         @java.lang.Override
         public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_LogMatch_descriptor;
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor;
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+            getDefaultInstanceForType() {
+          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+              .getDefaultInstance();
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+            build() {
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition result =
+              buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
+          }
+          return result;
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+            buildPartial() {
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition result =
+              new com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition(
+                  this);
+          if (bitField0_ != 0) {
+            buildPartial0(result);
+          }
+          onBuilt();
+          return result;
+        }
+
+        private void buildPartial0(
+            com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                result) {
+          int from_bitField0_ = bitField0_;
+          if (((from_bitField0_ & 0x00000001) != 0)) {
+            result.query_ = query_;
+          }
+          if (((from_bitField0_ & 0x00000002) != 0)) {
+            result.duration_ = durationBuilder_ == null ? duration_ : durationBuilder_.build();
+          }
+          if (((from_bitField0_ & 0x00000004) != 0)) {
+            result.trigger_ = triggerBuilder_ == null ? trigger_ : triggerBuilder_.build();
+          }
+          if (((from_bitField0_ & 0x00000008) != 0)) {
+            result.evaluationMissingData_ = evaluationMissingData_;
+          }
+        }
+
+        @java.lang.Override
+        public Builder clone() {
+          return super.clone();
+        }
+
+        @java.lang.Override
+        public Builder setField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.setField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+          return super.clearField(field);
+        }
+
+        @java.lang.Override
+        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+          return super.clearOneof(oneof);
+        }
+
+        @java.lang.Override
+        public Builder setRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field,
+            int index,
+            java.lang.Object value) {
+          return super.setRepeatedField(field, index, value);
+        }
+
+        @java.lang.Override
+        public Builder addRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.addRepeatedField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other
+              instanceof
+              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition) {
+            return mergeFrom(
+                (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                    other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(
+            com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition other) {
+          if (other
+              == com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                  .getDefaultInstance()) return this;
+          if (!other.getQuery().isEmpty()) {
+            query_ = other.query_;
+            bitField0_ |= 0x00000001;
+            onChanged();
+          }
+          if (other.hasDuration()) {
+            mergeDuration(other.getDuration());
+          }
+          if (other.hasTrigger()) {
+            mergeTrigger(other.getTrigger());
+          }
+          if (other.evaluationMissingData_ != 0) {
+            setEvaluationMissingDataValue(other.getEvaluationMissingDataValue());
+          }
+          this.mergeUnknownFields(other.getUnknownFields());
+          onChanged();
+          return this;
+        }
+
+        @java.lang.Override
+        public final boolean isInitialized() {
+          return true;
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          if (extensionRegistry == null) {
+            throw new java.lang.NullPointerException();
+          }
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                case 10:
+                  {
+                    query_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000001;
+                    break;
+                  } // case 10
+                case 18:
+                  {
+                    input.readMessage(getDurationFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000002;
+                    break;
+                  } // case 18
+                case 26:
+                  {
+                    input.readMessage(getTriggerFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000004;
+                    break;
+                  } // case 26
+                case 32:
+                  {
+                    evaluationMissingData_ = input.readEnum();
+                    bitField0_ |= 0x00000008;
+                    break;
+                  } // case 32
+                default:
+                  {
+                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                      done = true; // was an endgroup tag
+                    }
+                    break;
+                  } // default:
+              } // switch (tag)
+            } // while (!done)
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.unwrapIOException();
+          } finally {
+            onChanged();
+          } // finally
+          return this;
         }
 
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getDefaultInstanceForType() {
-          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
-        }
+        private int bitField0_;
 
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch build() {
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch result = buildPartial();
-          if (!result.isInitialized()) {
-            throw newUninitializedMessageException(result);
+        private java.lang.Object query_ = "";
+        /**
+         *
+         *
+         * 
+         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+         * query that outputs a boolean stream.
+         * 

+         *
+         * string query = 1;
+         *
+         * @return The query.
+         */
+        public java.lang.String getQuery() {
+          java.lang.Object ref = query_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            query_ = s;
+            return s;
+          } else {
+            return (java.lang.String) ref;
           }
-          return result;
         }
-
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch buildPartial() {
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch result =
-              new com.google.monitoring.v3.AlertPolicy.Condition.LogMatch(this);
-          if (bitField0_ != 0) {
-            buildPartial0(result);
+        /**
+         *
+         *
+         * 
+         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+         * query that outputs a boolean stream.
+         * 

+         *
+         * string query = 1;
+         *
+         * @return The bytes for query.
+         */
+        public com.google.protobuf.ByteString getQueryBytes() {
+          java.lang.Object ref = query_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            query_ = b;
+            return b;
+          } else {
+            return (com.google.protobuf.ByteString) ref;
           }
-          onBuilt();
-          return result;
         }
-
-        private void buildPartial0(com.google.monitoring.v3.AlertPolicy.Condition.LogMatch result) {
-          int from_bitField0_ = bitField0_;
-          if (((from_bitField0_ & 0x00000001) != 0)) {
-            result.filter_ = filter_;
-          }
-          if (((from_bitField0_ & 0x00000002) != 0)) {
-            result.labelExtractors_ = internalGetLabelExtractors();
-            result.labelExtractors_.makeImmutable();
+        /**
+         *
+         *
+         * 
+         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+         * query that outputs a boolean stream.
+         * 

+         *
+         * string query = 1;
+         *
+         * @param value The query to set.
+         * @return This builder for chaining.
+         */
+        public Builder setQuery(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
           }
+          query_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
         }
-
-        @java.lang.Override
-        public Builder clone() {
-          return super.clone();
-        }
-
-        @java.lang.Override
-        public Builder setField(
-            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-          return super.setField(field, value);
-        }
-
-        @java.lang.Override
-        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-          return super.clearField(field);
+        /**
+         *
+         *
+         * 
+         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+         * query that outputs a boolean stream.
+         * 

+         *
+         * string query = 1;
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearQuery() {
+          query_ = getDefaultInstance().getQuery();
+          bitField0_ = (bitField0_ & ~0x00000001);
+          onChanged();
+          return this;
         }
-
-        @java.lang.Override
-        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-          return super.clearOneof(oneof);
+        /**
+         *
+         *
+         * 
+         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
+         * query that outputs a boolean stream.
+         * 

+         *
+         * string query = 1;
+         *
+         * @param value The bytes for query to set.
+         * @return This builder for chaining.
+         */
+        public Builder setQueryBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          query_ = value;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
         }
 
-        @java.lang.Override
-        public Builder setRepeatedField(
-            com.google.protobuf.Descriptors.FieldDescriptor field,
-            int index,
-            java.lang.Object value) {
-          return super.setRepeatedField(field, index, value);
+        private com.google.protobuf.Duration duration_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            durationBuilder_;
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         *
+         * @return Whether the duration field is set.
+         */
+        public boolean hasDuration() {
+          return ((bitField0_ & 0x00000002) != 0);
         }
-
-        @java.lang.Override
-        public Builder addRepeatedField(
-            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-          return super.addRepeatedField(field, value);
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         *
+         * @return The duration.
+         */
+        public com.google.protobuf.Duration getDuration() {
+          if (durationBuilder_ == null) {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          } else {
+            return durationBuilder_.getMessage();
+          }
         }
-
-        @java.lang.Override
-        public Builder mergeFrom(com.google.protobuf.Message other) {
-          if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) {
-            return mergeFrom((com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) other);
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder setDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            duration_ = value;
+          } else {
+            durationBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
+          if (durationBuilder_ == null) {
+            duration_ = builderForValue.build();
           } else {
-            super.mergeFrom(other);
-            return this;
+            durationBuilder_.setMessage(builderForValue.build());
           }
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return this;
         }
-
-        public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.Condition.LogMatch other) {
-          if (other == com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance())
-            return this;
-          if (!other.getFilter().isEmpty()) {
-            filter_ = other.filter_;
-            bitField0_ |= 0x00000001;
-            onChanged();
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder mergeDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (((bitField0_ & 0x00000002) != 0)
+                && duration_ != null
+                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getDurationBuilder().mergeFrom(value);
+            } else {
+              duration_ = value;
+            }
+          } else {
+            durationBuilder_.mergeFrom(value);
           }
-          internalGetMutableLabelExtractors().mergeFrom(other.internalGetLabelExtractors());
           bitField0_ |= 0x00000002;
-          this.mergeUnknownFields(other.getUnknownFields());
           onChanged();
           return this;
         }
-
-        @java.lang.Override
-        public final boolean isInitialized() {
-          return true;
-        }
-
-        @java.lang.Override
-        public Builder mergeFrom(
-            com.google.protobuf.CodedInputStream input,
-            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-            throws java.io.IOException {
-          if (extensionRegistry == null) {
-            throw new java.lang.NullPointerException();
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public Builder clearDuration() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
           }
-          try {
-            boolean done = false;
-            while (!done) {
-              int tag = input.readTag();
-              switch (tag) {
-                case 0:
-                  done = true;
-                  break;
-                case 10:
-                  {
-                    filter_ = input.readStringRequireUtf8();
-                    bitField0_ |= 0x00000001;
-                    break;
-                  } // case 10
-                case 18:
-                  {
-                    com.google.protobuf.MapEntry
-                        labelExtractors__ =
-                            input.readMessage(
-                                LabelExtractorsDefaultEntryHolder.defaultEntry.getParserForType(),
-                                extensionRegistry);
-                    internalGetMutableLabelExtractors()
-                        .getMutableMap()
-                        .put(labelExtractors__.getKey(), labelExtractors__.getValue());
-                    bitField0_ |= 0x00000002;
-                    break;
-                  } // case 18
-                default:
-                  {
-                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
-                      done = true; // was an endgroup tag
-                    }
-                    break;
-                  } // default:
-              } // switch (tag)
-            } // while (!done)
-          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-            throw e.unwrapIOException();
-          } finally {
-            onChanged();
-          } // finally
+          onChanged();
           return this;
         }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public com.google.protobuf.Duration.Builder getDurationBuilder() {
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return getDurationFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+          if (durationBuilder_ != null) {
+            return durationBuilder_.getMessageOrBuilder();
+          } else {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * The amount of time that a time series must violate the
+         * threshold to be considered failing. Currently, only values
+         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
+         * seconds--are supported. If an invalid value is given, an
+         * error will be returned. When choosing a duration, it is useful to
+         * keep in mind the frequency of the underlying time series data
+         * (which may also be affected by any alignments specified in the
+         * `aggregations` field); a good duration is long enough so that a single
+         * outlier does not generate spurious alerts, but short enough that
+         * unhealthy states are detected and alerted on quickly.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2;
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            getDurationFieldBuilder() {
+          if (durationBuilder_ == null) {
+            durationBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.protobuf.Duration,
+                    com.google.protobuf.Duration.Builder,
+                    com.google.protobuf.DurationOrBuilder>(
+                    getDuration(), getParentForChildren(), isClean());
+            duration_ = null;
+          }
+          return durationBuilder_;
+        }
 
-        private int bitField0_;
-
-        private java.lang.Object filter_ = "";
+        private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
+            triggerBuilder_;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         *
+         * @return Whether the trigger field is set.
+         */
+        public boolean hasTrigger() {
+          return ((bitField0_ & 0x00000004) != 0);
+        }
         /**
          *
          *
          * 
-         * Required. A logs-based filter. See [Advanced Logs
-         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-         * for how this filter should be constructed.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          *
-         * @return The filter.
+         * @return The trigger.
          */
-        public java.lang.String getFilter() {
-          java.lang.Object ref = filter_;
-          if (!(ref instanceof java.lang.String)) {
-            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-            java.lang.String s = bs.toStringUtf8();
-            filter_ = s;
-            return s;
+        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
+          if (triggerBuilder_ == null) {
+            return trigger_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+                : trigger_;
           } else {
-            return (java.lang.String) ref;
+            return triggerBuilder_.getMessage();
           }
         }
         /**
          *
          *
          * 
-         * Required. A logs-based filter. See [Advanced Logs
-         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-         * for how this filter should be constructed.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return The bytes for filter.
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          */
-        public com.google.protobuf.ByteString getFilterBytes() {
-          java.lang.Object ref = filter_;
-          if (ref instanceof String) {
-            com.google.protobuf.ByteString b =
-                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-            filter_ = b;
-            return b;
+        public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
+          if (triggerBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            trigger_ = value;
           } else {
-            return (com.google.protobuf.ByteString) ref;
+            triggerBuilder_.setMessage(value);
           }
+          bitField0_ |= 0x00000004;
+          onChanged();
+          return this;
         }
         /**
          *
          *
          * 
-         * Required. A logs-based filter. See [Advanced Logs
-         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-         * for how this filter should be constructed.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @param value The filter to set.
-         * @return This builder for chaining.
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          */
-        public Builder setFilter(java.lang.String value) {
-          if (value == null) {
-            throw new NullPointerException();
+        public Builder setTrigger(
+            com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder builderForValue) {
+          if (triggerBuilder_ == null) {
+            trigger_ = builderForValue.build();
+          } else {
+            triggerBuilder_.setMessage(builderForValue.build());
           }
-          filter_ = value;
-          bitField0_ |= 0x00000001;
+          bitField0_ |= 0x00000004;
           onChanged();
           return this;
         }
@@ -9742,18 +13166,31 @@ public Builder setFilter(java.lang.String value) {
          *
          *
          * 
-         * Required. A logs-based filter. See [Advanced Logs
-         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-         * for how this filter should be constructed.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @return This builder for chaining.
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          */
-        public Builder clearFilter() {
-          filter_ = getDefaultInstance().getFilter();
-          bitField0_ = (bitField0_ & ~0x00000001);
+        public Builder mergeTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
+          if (triggerBuilder_ == null) {
+            if (((bitField0_ & 0x00000004) != 0)
+                && trigger_ != null
+                && trigger_
+                    != com.google.monitoring.v3.AlertPolicy.Condition.Trigger
+                        .getDefaultInstance()) {
+              getTriggerBuilder().mergeFrom(value);
+            } else {
+              trigger_ = value;
+            }
+          } else {
+            triggerBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000004;
           onChanged();
           return this;
         }
@@ -9761,264 +13198,207 @@ public Builder clearFilter() {
          *
          *
          * 
-         * Required. A logs-based filter. See [Advanced Logs
-         * Queries](https://cloud.google.com/logging/docs/view/advanced-queries)
-         * for how this filter should be constructed.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * string filter = 1 [(.google.api.field_behavior) = REQUIRED];
-         *
-         * @param value The bytes for filter to set.
-         * @return This builder for chaining.
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          */
-        public Builder setFilterBytes(com.google.protobuf.ByteString value) {
-          if (value == null) {
-            throw new NullPointerException();
+        public Builder clearTrigger() {
+          bitField0_ = (bitField0_ & ~0x00000004);
+          trigger_ = null;
+          if (triggerBuilder_ != null) {
+            triggerBuilder_.dispose();
+            triggerBuilder_ = null;
           }
-          checkByteStringIsUtf8(value);
-          filter_ = value;
-          bitField0_ |= 0x00000001;
           onChanged();
           return this;
         }
-
-        private com.google.protobuf.MapField labelExtractors_;
-
-        private com.google.protobuf.MapField
-            internalGetLabelExtractors() {
-          if (labelExtractors_ == null) {
-            return com.google.protobuf.MapField.emptyMapField(
-                LabelExtractorsDefaultEntryHolder.defaultEntry);
-          }
-          return labelExtractors_;
-        }
-
-        private com.google.protobuf.MapField
-            internalGetMutableLabelExtractors() {
-          if (labelExtractors_ == null) {
-            labelExtractors_ =
-                com.google.protobuf.MapField.newMapField(
-                    LabelExtractorsDefaultEntryHolder.defaultEntry);
-          }
-          if (!labelExtractors_.isMutable()) {
-            labelExtractors_ = labelExtractors_.copy();
-          }
-          bitField0_ |= 0x00000002;
+        /**
+         *
+         *
+         * 
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
+         * 

+         *
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         */
+        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder getTriggerBuilder() {
+          bitField0_ |= 0x00000004;
           onChanged();
-          return labelExtractors_;
-        }
-
-        public int getLabelExtractorsCount() {
-          return internalGetLabelExtractors().getMap().size();
+          return getTriggerFieldBuilder().getBuilder();
         }
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          */
-        @java.lang.Override
-        public boolean containsLabelExtractors(java.lang.String key) {
-          if (key == null) {
-            throw new NullPointerException("map key");
+        public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder
+            getTriggerOrBuilder() {
+          if (triggerBuilder_ != null) {
+            return triggerBuilder_.getMessageOrBuilder();
+          } else {
+            return trigger_ == null
+                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
+                : trigger_;
           }
-          return internalGetLabelExtractors().getMap().containsKey(key);
-        }
-        /** Use {@link #getLabelExtractorsMap()} instead. */
-        @java.lang.Override
-        @java.lang.Deprecated
-        public java.util.Map getLabelExtractors() {
-          return getLabelExtractorsMap();
         }
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * The number/percent of time series for which the comparison must hold
+         * in order for the condition to trigger. If unspecified, then the
+         * condition will trigger if the comparison is true for any of the
+         * time series that have been identified by `filter` and `aggregations`,
+         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
+         * are specified.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
          */
-        @java.lang.Override
-        public java.util.Map getLabelExtractorsMap() {
-          return internalGetLabelExtractors().getMap();
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
+            getTriggerFieldBuilder() {
+          if (triggerBuilder_ == null) {
+            triggerBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
+                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
+                    com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>(
+                    getTrigger(), getParentForChildren(), isClean());
+            trigger_ = null;
+          }
+          return triggerBuilder_;
         }
+
+        private int evaluationMissingData_ = 0;
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+         * 
+         *
+         * @return The enum numeric value on the wire for evaluationMissingData.
          */
         @java.lang.Override
-        public /* nullable */ java.lang.String getLabelExtractorsOrDefault(
-            java.lang.String key,
-            /* nullable */
-            java.lang.String defaultValue) {
-          if (key == null) {
-            throw new NullPointerException("map key");
-          }
-          java.util.Map map =
-              internalGetLabelExtractors().getMap();
-          return map.containsKey(key) ? map.get(key) : defaultValue;
+        public int getEvaluationMissingDataValue() {
+          return evaluationMissingData_;
         }
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+         * 
+         *
+         * @param value The enum numeric value on the wire for evaluationMissingData to set.
+         * @return This builder for chaining.
          */
-        @java.lang.Override
-        public java.lang.String getLabelExtractorsOrThrow(java.lang.String key) {
-          if (key == null) {
-            throw new NullPointerException("map key");
-          }
-          java.util.Map map =
-              internalGetLabelExtractors().getMap();
-          if (!map.containsKey(key)) {
-            throw new java.lang.IllegalArgumentException();
-          }
-          return map.get(key);
-        }
-
-        public Builder clearLabelExtractors() {
-          bitField0_ = (bitField0_ & ~0x00000002);
-          internalGetMutableLabelExtractors().getMutableMap().clear();
+        public Builder setEvaluationMissingDataValue(int value) {
+          evaluationMissingData_ = value;
+          bitField0_ |= 0x00000008;
+          onChanged();
           return this;
         }
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+         * 
+         *
+         * @return The evaluationMissingData.
          */
-        public Builder removeLabelExtractors(java.lang.String key) {
-          if (key == null) {
-            throw new NullPointerException("map key");
-          }
-          internalGetMutableLabelExtractors().getMutableMap().remove(key);
-          return this;
-        }
-        /** Use alternate mutation accessors instead. */
-        @java.lang.Deprecated
-        public java.util.Map getMutableLabelExtractors() {
-          bitField0_ |= 0x00000002;
-          return internalGetMutableLabelExtractors().getMutableMap();
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
+            getEvaluationMissingData() {
+          com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
+              com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
+                  evaluationMissingData_);
+          return result == null
+              ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
+              : result;
         }
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+         * 
+         *
+         * @param value The evaluationMissingData to set.
+         * @return This builder for chaining.
          */
-        public Builder putLabelExtractors(java.lang.String key, java.lang.String value) {
-          if (key == null) {
-            throw new NullPointerException("map key");
-          }
+        public Builder setEvaluationMissingData(
+            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData value) {
           if (value == null) {
-            throw new NullPointerException("map value");
+            throw new NullPointerException();
           }
-          internalGetMutableLabelExtractors().getMutableMap().put(key, value);
-          bitField0_ |= 0x00000002;
+          bitField0_ |= 0x00000008;
+          evaluationMissingData_ = value.getNumber();
+          onChanged();
           return this;
         }
         /**
          *
          *
          * 
-         * Optional. A map from a label key to an extractor expression, which is
-         * used to extract the value for this label key. Each entry in this map is
-         * a specification for how data should be extracted from log entries that
-         * match `filter`. Each combination of extracted values is treated as a
-         * separate rule for the purposes of triggering notifications. Label keys
-         * and corresponding values can be used in notifications generated by this
-         * condition.
-         *
-         * Please see [the documentation on logs-based metric
-         * `valueExtractor`s](https://cloud.google.com/logging/docs/reference/v2/rest/v2/projects.metrics#LogMetric.FIELDS.value_extractor)
-         * for syntax and examples.
+         * A condition control that determines how metric-threshold conditions
+         * are evaluated when data stops arriving.
          * 

          *
-         * map<string, string> label_extractors = 2;
+         * 
+         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
+         * 
+         *
+         * @return This builder for chaining.
          */
-        public Builder putAllLabelExtractors(
-            java.util.Map values) {
-          internalGetMutableLabelExtractors().getMutableMap().putAll(values);
-          bitField0_ |= 0x00000002;
+        public Builder clearEvaluationMissingData() {
+          bitField0_ = (bitField0_ & ~0x00000008);
+          evaluationMissingData_ = 0;
+          onChanged();
           return this;
         }
 
@@ -10034,24 +13414,28 @@ public final Builder mergeUnknownFields(
           return super.mergeUnknownFields(unknownFields);
         }
 
-        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
       }
 
-      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.LogMatch)
-      private static final com.google.monitoring.v3.AlertPolicy.Condition.LogMatch DEFAULT_INSTANCE;
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+      private static final com.google.monitoring.v3.AlertPolicy.Condition
+              .MonitoringQueryLanguageCondition
+          DEFAULT_INSTANCE;
 
       static {
-        DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition.LogMatch();
+        DEFAULT_INSTANCE =
+            new com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition();
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getDefaultInstance() {
+      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          getDefaultInstance() {
         return DEFAULT_INSTANCE;
       }
 
-      private static final com.google.protobuf.Parser PARSER =
-          new com.google.protobuf.AbstractParser() {
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
             @java.lang.Override
-            public LogMatch parsePartialFrom(
+            public MonitoringQueryLanguageCondition parsePartialFrom(
                 com.google.protobuf.CodedInputStream input,
                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                 throws com.google.protobuf.InvalidProtocolBufferException {
@@ -10071,245 +13455,443 @@ public LogMatch parsePartialFrom(
             }
           };
 
-      public static com.google.protobuf.Parser parser() {
+      public static com.google.protobuf.Parser parser() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.protobuf.Parser getParserForType() {
+      public com.google.protobuf.Parser getParserForType() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getDefaultInstanceForType() {
+      public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          getDefaultInstanceForType() {
         return DEFAULT_INSTANCE;
       }
     }
 
-    public interface MonitoringQueryLanguageConditionOrBuilder
+    public interface PrometheusQueryLanguageConditionOrBuilder
         extends
-        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
         com.google.protobuf.MessageOrBuilder {
 
       /**
        *
        *
        * 
-       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-       * query that outputs a boolean stream.
+       * Required. The PromQL expression to evaluate. Every evaluation cycle
+       * this expression is evaluated at the current time, and all resultant
+       * time series become pending/firing alerts. This field must not be empty.
+       * 

+       *
+       * string query = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The query.
+       */
+      java.lang.String getQuery();
+      /**
+       *
+       *
+       * 
+       * Required. The PromQL expression to evaluate. Every evaluation cycle
+       * this expression is evaluated at the current time, and all resultant
+       * time series become pending/firing alerts. This field must not be empty.
+       * 

+       *
+       * string query = 1 [(.google.api.field_behavior) = REQUIRED];
+       *
+       * @return The bytes for query.
+       */
+      com.google.protobuf.ByteString getQueryBytes();
+
+      /**
+       *
+       *
+       * 
+       * Optional. Alerts are considered firing once their PromQL expression was
+       * evaluated to be "true" for this long.
+       * Alerts whose PromQL expression was not evaluated to be "true" for
+       * long enough are considered pending.
+       * Must be a non-negative duration or missing.
+       * This field is optional. Its default value is zero.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       *
+       * @return Whether the duration field is set.
+       */
+      boolean hasDuration();
+      /**
+       *
+       *
+       * 
+       * Optional. Alerts are considered firing once their PromQL expression was
+       * evaluated to be "true" for this long.
+       * Alerts whose PromQL expression was not evaluated to be "true" for
+       * long enough are considered pending.
+       * Must be a non-negative duration or missing.
+       * This field is optional. Its default value is zero.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       *
+       * @return The duration.
+       */
+      com.google.protobuf.Duration getDuration();
+      /**
+       *
+       *
+       * 
+       * Optional. Alerts are considered firing once their PromQL expression was
+       * evaluated to be "true" for this long.
+       * Alerts whose PromQL expression was not evaluated to be "true" for
+       * long enough are considered pending.
+       * Must be a non-negative duration or missing.
+       * This field is optional. Its default value is zero.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       */
+      com.google.protobuf.DurationOrBuilder getDurationOrBuilder();
+
+      /**
+       *
+       *
+       * 
+       * Optional. How often this rule should be evaluated.
+       * Must be a positive multiple of 30 seconds or missing.
+       * This field is optional. Its default value is 30 seconds.
+       * If this PrometheusQueryLanguageCondition was generated from a
+       * Prometheus alerting rule, then this value should be taken from the
+       * enclosing rule group.
        * 

        *
-       * string query = 1;
+       * 
+       * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        *
-       * @return The query.
+       * @return Whether the evaluationInterval field is set.
        */
-      java.lang.String getQuery();
+      boolean hasEvaluationInterval();
       /**
        *
        *
        * 
-       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-       * query that outputs a boolean stream.
+       * Optional. How often this rule should be evaluated.
+       * Must be a positive multiple of 30 seconds or missing.
+       * This field is optional. Its default value is 30 seconds.
+       * If this PrometheusQueryLanguageCondition was generated from a
+       * Prometheus alerting rule, then this value should be taken from the
+       * enclosing rule group.
        * 

        *
-       * string query = 1;
+       * 
+       * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        *
-       * @return The bytes for query.
+       * @return The evaluationInterval.
        */
-      com.google.protobuf.ByteString getQueryBytes();
-
+      com.google.protobuf.Duration getEvaluationInterval();
       /**
        *
        *
        * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
+       * Optional. How often this rule should be evaluated.
+       * Must be a positive multiple of 30 seconds or missing.
+       * This field is optional. Its default value is 30 seconds.
+       * If this PrometheusQueryLanguageCondition was generated from a
+       * Prometheus alerting rule, then this value should be taken from the
+       * enclosing rule group.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
-       *
-       * @return Whether the duration field is set.
+       * 
+       * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
-      boolean hasDuration();
+      com.google.protobuf.DurationOrBuilder getEvaluationIntervalOrBuilder();
+
       /**
        *
        *
        * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       */
+      int getLabelsCount();
+      /**
        *
-       * @return The duration.
+       *
+       * 
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
+       * 

+       *
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
-      com.google.protobuf.Duration getDuration();
+      boolean containsLabels(java.lang.String key);
+      /** Use {@link #getLabelsMap()} instead. */
+      @java.lang.Deprecated
+      java.util.Map getLabels();
       /**
        *
        *
        * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
-      com.google.protobuf.DurationOrBuilder getDurationOrBuilder();
-
+      java.util.Map getLabelsMap();
       /**
        *
        *
        * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       */
+      /* nullable */
+      java.lang.String getLabelsOrDefault(
+          java.lang.String key,
+          /* nullable */
+          java.lang.String defaultValue);
+      /**
        *
-       * @return Whether the trigger field is set.
+       *
+       * 
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
+       * 

+       *
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
-      boolean hasTrigger();
+      java.lang.String getLabelsOrThrow(java.lang.String key);
+
       /**
        *
        *
        * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
+       * Optional. The rule group name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must
+       * contain a valid UTF-8 string.
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
        *
-       * @return The trigger.
+       * @return The ruleGroup.
        */
-      com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger();
+      java.lang.String getRuleGroup();
       /**
        *
        *
        * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
+       * Optional. The rule group name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must
+       * contain a valid UTF-8 string.
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @return The bytes for ruleGroup.
        */
-      com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder();
+      com.google.protobuf.ByteString getRuleGroupBytes();
 
       /**
        *
        *
        * 
-       * A condition control that determines how metric-threshold conditions
-       * are evaluated when data stops arriving.
+       * Optional. The alerting rule name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must be a
+       * [valid Prometheus label
+       * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-       * 
+       * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
        *
-       * @return The enum numeric value on the wire for evaluationMissingData.
+       * @return The alertRule.
        */
-      int getEvaluationMissingDataValue();
+      java.lang.String getAlertRule();
       /**
        *
        *
        * 
-       * A condition control that determines how metric-threshold conditions
-       * are evaluated when data stops arriving.
+       * Optional. The alerting rule name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must be a
+       * [valid Prometheus label
+       * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-       * 
+       * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
        *
-       * @return The evaluationMissingData.
+       * @return The bytes for alertRule.
        */
-      com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-          getEvaluationMissingData();
+      com.google.protobuf.ByteString getAlertRuleBytes();
     }
     /**
      *
      *
      * 
      * A condition type that allows alert policies to be defined using
-     * [Monitoring Query Language](https://cloud.google.com/monitoring/mql).
+     * [Prometheus Query Language
+     * (PromQL)](https://prometheus.io/docs/prometheus/latest/querying/basics/).
+     *
+     * The PrometheusQueryLanguageCondition message contains information
+     * from a Prometheus alerting rule and its associated rule group.
+     *
+     * A Prometheus alerting rule is described
+     * [here](https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/).
+     * The semantics of a Prometheus alerting rule is described
+     * [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#rule).
+     *
+     * A Prometheus rule group is described
+     * [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/).
+     * The semantics of a Prometheus rule group is described
+     * [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#rule_group).
+     *
+     * Because Cloud Alerting has no representation of a Prometheus rule
+     * group resource, we must embed the information of the parent rule
+     * group inside each of the conditions that refer to it. We must also
+     * update the contents of all Prometheus alerts in case the information
+     * of their rule group changes.
+     *
+     * The PrometheusQueryLanguageCondition protocol buffer combines the
+     * information of the corresponding rule group and alerting rule.
+     * The structure of the PrometheusQueryLanguageCondition protocol buffer
+     * does NOT mimic the structure of the Prometheus rule group and alerting
+     * rule YAML declarations. The PrometheusQueryLanguageCondition protocol
+     * buffer may change in the future to support future rule group and/or
+     * alerting rule features. There are no new such features at the present
+     * time (2023-06-26).
      * 

      *
      * Protobuf type {@code
-     * google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition}
+     * google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition}
      */
-    public static final class MonitoringQueryLanguageCondition
+    public static final class PrometheusQueryLanguageCondition
         extends com.google.protobuf.GeneratedMessageV3
         implements
-        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-        MonitoringQueryLanguageConditionOrBuilder {
+        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+        PrometheusQueryLanguageConditionOrBuilder {
       private static final long serialVersionUID = 0L;
-      // Use MonitoringQueryLanguageCondition.newBuilder() to construct.
-      private MonitoringQueryLanguageCondition(
+      // Use PrometheusQueryLanguageCondition.newBuilder() to construct.
+      private PrometheusQueryLanguageCondition(
           com.google.protobuf.GeneratedMessageV3.Builder builder) {
         super(builder);
       }
 
-      private MonitoringQueryLanguageCondition() {
+      private PrometheusQueryLanguageCondition() {
         query_ = "";
-        evaluationMissingData_ = 0;
+        ruleGroup_ = "";
+        alertRule_ = "";
       }
 
       @java.lang.Override
       @SuppressWarnings({"unused"})
       protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
-        return new MonitoringQueryLanguageCondition();
+        return new PrometheusQueryLanguageCondition();
       }
 
       public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
         return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor;
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor;
+      }
+
+      @SuppressWarnings({"rawtypes"})
+      @java.lang.Override
+      protected com.google.protobuf.MapField internalGetMapField(int number) {
+        switch (number) {
+          case 4:
+            return internalGetLabels();
+          default:
+            throw new RuntimeException("Invalid map field number: " + number);
+        }
       }
 
       @java.lang.Override
       protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
           internalGetFieldAccessorTable() {
         return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_fieldAccessorTable
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_fieldAccessorTable
             .ensureFieldAccessorsInitialized(
-                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                     .class,
-                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                     .Builder.class);
       }
 
@@ -10321,11 +13903,12 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
        *
        *
        * 
-       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-       * query that outputs a boolean stream.
+       * Required. The PromQL expression to evaluate. Every evaluation cycle
+       * this expression is evaluated at the current time, and all resultant
+       * time series become pending/firing alerts. This field must not be empty.
        * 

        *
-       * string query = 1;
+       * string query = 1 [(.google.api.field_behavior) = REQUIRED];
        *
        * @return The query.
        */
@@ -10345,11 +13928,12 @@ public java.lang.String getQuery() {
        *
        *
        * 
-       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-       * query that outputs a boolean stream.
+       * Required. The PromQL expression to evaluate. Every evaluation cycle
+       * this expression is evaluated at the current time, and all resultant
+       * time series become pending/firing alerts. This field must not be empty.
        * 

        *
-       * string query = 1;
+       * string query = 1 [(.google.api.field_behavior) = REQUIRED];
        *
        * @return The bytes for query.
        */
@@ -10366,187 +13950,417 @@ public com.google.protobuf.ByteString getQueryBytes() {
         }
       }
 
-      public static final int DURATION_FIELD_NUMBER = 2;
-      private com.google.protobuf.Duration duration_;
+      public static final int DURATION_FIELD_NUMBER = 2;
+      private com.google.protobuf.Duration duration_;
+      /**
+       *
+       *
+       * 
+       * Optional. Alerts are considered firing once their PromQL expression was
+       * evaluated to be "true" for this long.
+       * Alerts whose PromQL expression was not evaluated to be "true" for
+       * long enough are considered pending.
+       * Must be a non-negative duration or missing.
+       * This field is optional. Its default value is zero.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       *
+       * @return Whether the duration field is set.
+       */
+      @java.lang.Override
+      public boolean hasDuration() {
+        return duration_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. Alerts are considered firing once their PromQL expression was
+       * evaluated to be "true" for this long.
+       * Alerts whose PromQL expression was not evaluated to be "true" for
+       * long enough are considered pending.
+       * Must be a non-negative duration or missing.
+       * This field is optional. Its default value is zero.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       *
+       * @return The duration.
+       */
+      @java.lang.Override
+      public com.google.protobuf.Duration getDuration() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. Alerts are considered firing once their PromQL expression was
+       * evaluated to be "true" for this long.
+       * Alerts whose PromQL expression was not evaluated to be "true" for
+       * long enough are considered pending.
+       * Must be a non-negative duration or missing.
+       * This field is optional. Its default value is zero.
+       * 

+       *
+       * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       */
+      @java.lang.Override
+      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      }
+
+      public static final int EVALUATION_INTERVAL_FIELD_NUMBER = 3;
+      private com.google.protobuf.Duration evaluationInterval_;
+      /**
+       *
+       *
+       * 
+       * Optional. How often this rule should be evaluated.
+       * Must be a positive multiple of 30 seconds or missing.
+       * This field is optional. Its default value is 30 seconds.
+       * If this PrometheusQueryLanguageCondition was generated from a
+       * Prometheus alerting rule, then this value should be taken from the
+       * enclosing rule group.
+       * 

+       *
+       * 
+       * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       *
+       * @return Whether the evaluationInterval field is set.
+       */
+      @java.lang.Override
+      public boolean hasEvaluationInterval() {
+        return evaluationInterval_ != null;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. How often this rule should be evaluated.
+       * Must be a positive multiple of 30 seconds or missing.
+       * This field is optional. Its default value is 30 seconds.
+       * If this PrometheusQueryLanguageCondition was generated from a
+       * Prometheus alerting rule, then this value should be taken from the
+       * enclosing rule group.
+       * 

+       *
+       * 
+       * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       *
+       * @return The evaluationInterval.
+       */
+      @java.lang.Override
+      public com.google.protobuf.Duration getEvaluationInterval() {
+        return evaluationInterval_ == null
+            ? com.google.protobuf.Duration.getDefaultInstance()
+            : evaluationInterval_;
+      }
+      /**
+       *
+       *
+       * 
+       * Optional. How often this rule should be evaluated.
+       * Must be a positive multiple of 30 seconds or missing.
+       * This field is optional. Its default value is 30 seconds.
+       * If this PrometheusQueryLanguageCondition was generated from a
+       * Prometheus alerting rule, then this value should be taken from the
+       * enclosing rule group.
+       * 

+       *
+       * 
+       * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+       * 
+       */
+      @java.lang.Override
+      public com.google.protobuf.DurationOrBuilder getEvaluationIntervalOrBuilder() {
+        return evaluationInterval_ == null
+            ? com.google.protobuf.Duration.getDefaultInstance()
+            : evaluationInterval_;
+      }
+
+      public static final int LABELS_FIELD_NUMBER = 4;
+
+      private static final class LabelsDefaultEntryHolder {
+        static final com.google.protobuf.MapEntry defaultEntry =
+            com.google.protobuf.MapEntry.newDefaultInstance(
+                com.google.monitoring.v3.AlertProto
+                    .internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_LabelsEntry_descriptor,
+                com.google.protobuf.WireFormat.FieldType.STRING,
+                "",
+                com.google.protobuf.WireFormat.FieldType.STRING,
+                "");
+      }
+
+      @SuppressWarnings("serial")
+      private com.google.protobuf.MapField labels_;
+
+      private com.google.protobuf.MapField internalGetLabels() {
+        if (labels_ == null) {
+          return com.google.protobuf.MapField.emptyMapField(LabelsDefaultEntryHolder.defaultEntry);
+        }
+        return labels_;
+      }
+
+      public int getLabelsCount() {
+        return internalGetLabels().getMap().size();
+      }
       /**
        *
        *
        * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
-       *
-       * @return Whether the duration field is set.
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
       @java.lang.Override
-      public boolean hasDuration() {
-        return duration_ != null;
+      public boolean containsLabels(java.lang.String key) {
+        if (key == null) {
+          throw new NullPointerException("map key");
+        }
+        return internalGetLabels().getMap().containsKey(key);
+      }
+      /** Use {@link #getLabelsMap()} instead. */
+      @java.lang.Override
+      @java.lang.Deprecated
+      public java.util.Map getLabels() {
+        return getLabelsMap();
       }
       /**
        *
        *
        * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
-       *
-       * @return The duration.
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
       @java.lang.Override
-      public com.google.protobuf.Duration getDuration() {
-        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      public java.util.Map getLabelsMap() {
+        return internalGetLabels().getMap();
       }
       /**
        *
        *
        * 
-       * The amount of time that a time series must violate the
-       * threshold to be considered failing. Currently, only values
-       * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-       * seconds--are supported. If an invalid value is given, an
-       * error will be returned. When choosing a duration, it is useful to
-       * keep in mind the frequency of the underlying time series data
-       * (which may also be affected by any alignments specified in the
-       * `aggregations` field); a good duration is long enough so that a single
-       * outlier does not generate spurious alerts, but short enough that
-       * unhealthy states are detected and alerted on quickly.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.protobuf.Duration duration = 2;
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
       @java.lang.Override
-      public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
-        return duration_ == null ? com.google.protobuf.Duration.getDefaultInstance() : duration_;
+      public /* nullable */ java.lang.String getLabelsOrDefault(
+          java.lang.String key,
+          /* nullable */
+          java.lang.String defaultValue) {
+        if (key == null) {
+          throw new NullPointerException("map key");
+        }
+        java.util.Map map = internalGetLabels().getMap();
+        return map.containsKey(key) ? map.get(key) : defaultValue;
       }
-
-      public static final int TRIGGER_FIELD_NUMBER = 3;
-      private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
       /**
        *
        *
        * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
+       * Optional. Labels to add to or overwrite in the PromQL query result.
+       * Label names [must be
+       * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * Label values can be [templatized by using
+       * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+       * The only available variable names are the names of the labels in the
+       * PromQL result, including "__name__" and "value". "labels" may be empty.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-       *
-       * @return Whether the trigger field is set.
+       * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+       * 
        */
       @java.lang.Override
-      public boolean hasTrigger() {
-        return trigger_ != null;
+      public java.lang.String getLabelsOrThrow(java.lang.String key) {
+        if (key == null) {
+          throw new NullPointerException("map key");
+        }
+        java.util.Map map = internalGetLabels().getMap();
+        if (!map.containsKey(key)) {
+          throw new java.lang.IllegalArgumentException();
+        }
+        return map.get(key);
       }
+
+      public static final int RULE_GROUP_FIELD_NUMBER = 5;
+
+      @SuppressWarnings("serial")
+      private volatile java.lang.Object ruleGroup_ = "";
       /**
        *
        *
        * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
+       * Optional. The rule group name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must
+       * contain a valid UTF-8 string.
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
        *
-       * @return The trigger.
+       * @return The ruleGroup.
        */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
-        return trigger_ == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-            : trigger_;
+      public java.lang.String getRuleGroup() {
+        java.lang.Object ref = ruleGroup_;
+        if (ref instanceof java.lang.String) {
+          return (java.lang.String) ref;
+        } else {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          ruleGroup_ = s;
+          return s;
+        }
       }
       /**
        *
        *
        * 
-       * The number/percent of time series for which the comparison must hold
-       * in order for the condition to trigger. If unspecified, then the
-       * condition will trigger if the comparison is true for any of the
-       * time series that have been identified by `filter` and `aggregations`,
-       * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-       * are specified.
+       * Optional. The rule group name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must
+       * contain a valid UTF-8 string.
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+       * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
+       *
+       * @return The bytes for ruleGroup.
        */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder getTriggerOrBuilder() {
-        return trigger_ == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-            : trigger_;
+      public com.google.protobuf.ByteString getRuleGroupBytes() {
+        java.lang.Object ref = ruleGroup_;
+        if (ref instanceof java.lang.String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          ruleGroup_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
       }
 
-      public static final int EVALUATION_MISSING_DATA_FIELD_NUMBER = 4;
-      private int evaluationMissingData_ = 0;
+      public static final int ALERT_RULE_FIELD_NUMBER = 6;
+
+      @SuppressWarnings("serial")
+      private volatile java.lang.Object alertRule_ = "";
       /**
        *
        *
        * 
-       * A condition control that determines how metric-threshold conditions
-       * are evaluated when data stops arriving.
+       * Optional. The alerting rule name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must be a
+       * [valid Prometheus label
+       * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-       * 
+       * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
        *
-       * @return The enum numeric value on the wire for evaluationMissingData.
+       * @return The alertRule.
        */
       @java.lang.Override
-      public int getEvaluationMissingDataValue() {
-        return evaluationMissingData_;
+      public java.lang.String getAlertRule() {
+        java.lang.Object ref = alertRule_;
+        if (ref instanceof java.lang.String) {
+          return (java.lang.String) ref;
+        } else {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          alertRule_ = s;
+          return s;
+        }
       }
       /**
        *
        *
        * 
-       * A condition control that determines how metric-threshold conditions
-       * are evaluated when data stops arriving.
+       * Optional. The alerting rule name of this alert in the corresponding
+       * Prometheus configuration file.
+       *
+       * Some external tools may require this field to be populated correctly
+       * in order to refer to the original Prometheus configuration file.
+       * The rule group name and the alert name are necessary to update the
+       * relevant AlertPolicies in case the definition of the rule group changes
+       * in the future.
+       *
+       * This field is optional. If this field is not empty, then it must be a
+       * [valid Prometheus label
+       * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+       * This field may not exceed 2048 Unicode characters in length.
        * 

        *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-       * 
+       * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
        *
-       * @return The evaluationMissingData.
+       * @return The bytes for alertRule.
        */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-          getEvaluationMissingData() {
-        com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
-            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
-                evaluationMissingData_);
-        return result == null
-            ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
-            : result;
+      public com.google.protobuf.ByteString getAlertRuleBytes() {
+        java.lang.Object ref = alertRule_;
+        if (ref instanceof java.lang.String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          alertRule_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
       }
 
       private byte memoizedIsInitialized = -1;
@@ -10569,14 +14383,16 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
         if (duration_ != null) {
           output.writeMessage(2, getDuration());
         }
-        if (trigger_ != null) {
-          output.writeMessage(3, getTrigger());
+        if (evaluationInterval_ != null) {
+          output.writeMessage(3, getEvaluationInterval());
         }
-        if (evaluationMissingData_
-            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-                .EVALUATION_MISSING_DATA_UNSPECIFIED
-                .getNumber()) {
-          output.writeEnum(4, evaluationMissingData_);
+        com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
+            output, internalGetLabels(), LabelsDefaultEntryHolder.defaultEntry, 4);
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(ruleGroup_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 5, ruleGroup_);
+        }
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(alertRule_)) {
+          com.google.protobuf.GeneratedMessageV3.writeString(output, 6, alertRule_);
         }
         getUnknownFields().writeTo(output);
       }
@@ -10593,14 +14409,25 @@ public int getSerializedSize() {
         if (duration_ != null) {
           size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getDuration());
         }
-        if (trigger_ != null) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getTrigger());
+        if (evaluationInterval_ != null) {
+          size +=
+              com.google.protobuf.CodedOutputStream.computeMessageSize(3, getEvaluationInterval());
         }
-        if (evaluationMissingData_
-            != com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-                .EVALUATION_MISSING_DATA_UNSPECIFIED
-                .getNumber()) {
-          size += com.google.protobuf.CodedOutputStream.computeEnumSize(4, evaluationMissingData_);
+        for (java.util.Map.Entry entry :
+            internalGetLabels().getMap().entrySet()) {
+          com.google.protobuf.MapEntry labels__ =
+              LabelsDefaultEntryHolder.defaultEntry
+                  .newBuilderForType()
+                  .setKey(entry.getKey())
+                  .setValue(entry.getValue())
+                  .build();
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, labels__);
+        }
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(ruleGroup_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, ruleGroup_);
+        }
+        if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(alertRule_)) {
+          size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, alertRule_);
         }
         size += getUnknownFields().getSerializedSize();
         memoizedSize = size;
@@ -10614,22 +14441,24 @@ public boolean equals(final java.lang.Object obj) {
         }
         if (!(obj
             instanceof
-            com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)) {
+            com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)) {
           return super.equals(obj);
         }
-        com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition other =
-            (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition) obj;
+        com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition other =
+            (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition) obj;
 
         if (!getQuery().equals(other.getQuery())) return false;
         if (hasDuration() != other.hasDuration()) return false;
         if (hasDuration()) {
           if (!getDuration().equals(other.getDuration())) return false;
         }
-        if (hasTrigger() != other.hasTrigger()) return false;
-        if (hasTrigger()) {
-          if (!getTrigger().equals(other.getTrigger())) return false;
+        if (hasEvaluationInterval() != other.hasEvaluationInterval()) return false;
+        if (hasEvaluationInterval()) {
+          if (!getEvaluationInterval().equals(other.getEvaluationInterval())) return false;
         }
-        if (evaluationMissingData_ != other.evaluationMissingData_) return false;
+        if (!internalGetLabels().equals(other.internalGetLabels())) return false;
+        if (!getRuleGroup().equals(other.getRuleGroup())) return false;
+        if (!getAlertRule().equals(other.getAlertRule())) return false;
         if (!getUnknownFields().equals(other.getUnknownFields())) return false;
         return true;
       }
@@ -10647,37 +14476,43 @@ public int hashCode() {
           hash = (37 * hash) + DURATION_FIELD_NUMBER;
           hash = (53 * hash) + getDuration().hashCode();
         }
-        if (hasTrigger()) {
-          hash = (37 * hash) + TRIGGER_FIELD_NUMBER;
-          hash = (53 * hash) + getTrigger().hashCode();
+        if (hasEvaluationInterval()) {
+          hash = (37 * hash) + EVALUATION_INTERVAL_FIELD_NUMBER;
+          hash = (53 * hash) + getEvaluationInterval().hashCode();
         }
-        hash = (37 * hash) + EVALUATION_MISSING_DATA_FIELD_NUMBER;
-        hash = (53 * hash) + evaluationMissingData_;
+        if (!internalGetLabels().getMap().isEmpty()) {
+          hash = (37 * hash) + LABELS_FIELD_NUMBER;
+          hash = (53 * hash) + internalGetLabels().hashCode();
+        }
+        hash = (37 * hash) + RULE_GROUP_FIELD_NUMBER;
+        hash = (53 * hash) + getRuleGroup().hashCode();
+        hash = (37 * hash) + ALERT_RULE_FIELD_NUMBER;
+        hash = (53 * hash) + getAlertRule().hashCode();
         hash = (29 * hash) + getUnknownFields().hashCode();
         memoizedHashCode = hash;
         return hash;
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(java.nio.ByteBuffer data)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(
               java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(com.google.protobuf.ByteString data)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(
               com.google.protobuf.ByteString data,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -10685,23 +14520,23 @@ public int hashCode() {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(java.io.InputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(
               java.io.InputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -10710,12 +14545,12 @@ public int hashCode() {
             PARSER, input, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseDelimitedFrom(
               java.io.InputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -10724,12 +14559,12 @@ public int hashCode() {
             PARSER, input, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(com.google.protobuf.CodedInputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           parseFrom(
               com.google.protobuf.CodedInputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -10748,7 +14583,7 @@ public static Builder newBuilder() {
       }
 
       public static Builder newBuilder(
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
               prototype) {
         return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
       }
@@ -10769,36 +14604,85 @@ protected Builder newBuilderForType(
        *
        * 
        * A condition type that allows alert policies to be defined using
-       * [Monitoring Query Language](https://cloud.google.com/monitoring/mql).
+       * [Prometheus Query Language
+       * (PromQL)](https://prometheus.io/docs/prometheus/latest/querying/basics/).
+       *
+       * The PrometheusQueryLanguageCondition message contains information
+       * from a Prometheus alerting rule and its associated rule group.
+       *
+       * A Prometheus alerting rule is described
+       * [here](https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/).
+       * The semantics of a Prometheus alerting rule is described
+       * [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#rule).
+       *
+       * A Prometheus rule group is described
+       * [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/).
+       * The semantics of a Prometheus rule group is described
+       * [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#rule_group).
+       *
+       * Because Cloud Alerting has no representation of a Prometheus rule
+       * group resource, we must embed the information of the parent rule
+       * group inside each of the conditions that refer to it. We must also
+       * update the contents of all Prometheus alerts in case the information
+       * of their rule group changes.
+       *
+       * The PrometheusQueryLanguageCondition protocol buffer combines the
+       * information of the corresponding rule group and alerting rule.
+       * The structure of the PrometheusQueryLanguageCondition protocol buffer
+       * does NOT mimic the structure of the Prometheus rule group and alerting
+       * rule YAML declarations. The PrometheusQueryLanguageCondition protocol
+       * buffer may change in the future to support future rule group and/or
+       * alerting rule features. There are no new such features at the present
+       * time (2023-06-26).
        * 

        *
        * Protobuf type {@code
-       * google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition}
+       * google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition}
        */
       public static final class Builder
           extends com.google.protobuf.GeneratedMessageV3.Builder
           implements
-          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageConditionOrBuilder {
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageConditionOrBuilder {
         public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor;
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor;
+        }
+
+        @SuppressWarnings({"rawtypes"})
+        protected com.google.protobuf.MapField internalGetMapField(int number) {
+          switch (number) {
+            case 4:
+              return internalGetLabels();
+            default:
+              throw new RuntimeException("Invalid map field number: " + number);
+          }
+        }
+
+        @SuppressWarnings({"rawtypes"})
+        protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
+          switch (number) {
+            case 4:
+              return internalGetMutableLabels();
+            default:
+              throw new RuntimeException("Invalid map field number: " + number);
+          }
         }
 
         @java.lang.Override
         protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
             internalGetFieldAccessorTable() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_fieldAccessorTable
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_fieldAccessorTable
               .ensureFieldAccessorsInitialized(
-                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                  com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                       .class,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                  com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                       .Builder.class);
         }
 
         // Construct using
-        // com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition.newBuilder()
+        // com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition.newBuilder()
         private Builder() {}
 
         private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
@@ -10815,32 +14699,34 @@ public Builder clear() {
             durationBuilder_.dispose();
             durationBuilder_ = null;
           }
-          trigger_ = null;
-          if (triggerBuilder_ != null) {
-            triggerBuilder_.dispose();
-            triggerBuilder_ = null;
+          evaluationInterval_ = null;
+          if (evaluationIntervalBuilder_ != null) {
+            evaluationIntervalBuilder_.dispose();
+            evaluationIntervalBuilder_ = null;
           }
-          evaluationMissingData_ = 0;
+          internalGetMutableLabels().clear();
+          ruleGroup_ = "";
+          alertRule_ = "";
           return this;
         }
 
         @java.lang.Override
         public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor;
+              .internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor;
         }
 
         @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+        public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
             getDefaultInstanceForType() {
-          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          return com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
               .getDefaultInstance();
         }
 
         @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+        public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
             build() {
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition result =
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition result =
               buildPartial();
           if (!result.isInitialized()) {
             throw newUninitializedMessageException(result);
@@ -10849,10 +14735,10 @@ public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
         }
 
         @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+        public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
             buildPartial() {
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition result =
-              new com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition(
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition result =
+              new com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition(
                   this);
           if (bitField0_ != 0) {
             buildPartial0(result);
@@ -10862,7 +14748,7 @@ public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
         }
 
         private void buildPartial0(
-            com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+            com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                 result) {
           int from_bitField0_ = bitField0_;
           if (((from_bitField0_ & 0x00000001) != 0)) {
@@ -10872,10 +14758,20 @@ private void buildPartial0(
             result.duration_ = durationBuilder_ == null ? duration_ : durationBuilder_.build();
           }
           if (((from_bitField0_ & 0x00000004) != 0)) {
-            result.trigger_ = triggerBuilder_ == null ? trigger_ : triggerBuilder_.build();
+            result.evaluationInterval_ =
+                evaluationIntervalBuilder_ == null
+                    ? evaluationInterval_
+                    : evaluationIntervalBuilder_.build();
           }
           if (((from_bitField0_ & 0x00000008) != 0)) {
-            result.evaluationMissingData_ = evaluationMissingData_;
+            result.labels_ = internalGetLabels();
+            result.labels_.makeImmutable();
+          }
+          if (((from_bitField0_ & 0x00000010) != 0)) {
+            result.ruleGroup_ = ruleGroup_;
+          }
+          if (((from_bitField0_ & 0x00000020) != 0)) {
+            result.alertRule_ = alertRule_;
           }
         }
 
@@ -10918,9 +14814,9 @@ public Builder addRepeatedField(
         public Builder mergeFrom(com.google.protobuf.Message other) {
           if (other
               instanceof
-              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition) {
+              com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition) {
             return mergeFrom(
-                (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
                     other);
           } else {
             super.mergeFrom(other);
@@ -10929,9 +14825,9 @@ public Builder mergeFrom(com.google.protobuf.Message other) {
         }
 
         public Builder mergeFrom(
-            com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition other) {
+            com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition other) {
           if (other
-              == com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+              == com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                   .getDefaultInstance()) return this;
           if (!other.getQuery().isEmpty()) {
             query_ = other.query_;
@@ -10941,11 +14837,20 @@ public Builder mergeFrom(
           if (other.hasDuration()) {
             mergeDuration(other.getDuration());
           }
-          if (other.hasTrigger()) {
-            mergeTrigger(other.getTrigger());
+          if (other.hasEvaluationInterval()) {
+            mergeEvaluationInterval(other.getEvaluationInterval());
           }
-          if (other.evaluationMissingData_ != 0) {
-            setEvaluationMissingDataValue(other.getEvaluationMissingDataValue());
+          internalGetMutableLabels().mergeFrom(other.internalGetLabels());
+          bitField0_ |= 0x00000008;
+          if (!other.getRuleGroup().isEmpty()) {
+            ruleGroup_ = other.ruleGroup_;
+            bitField0_ |= 0x00000010;
+            onChanged();
+          }
+          if (!other.getAlertRule().isEmpty()) {
+            alertRule_ = other.alertRule_;
+            bitField0_ |= 0x00000020;
+            onChanged();
           }
           this.mergeUnknownFields(other.getUnknownFields());
           onChanged();
@@ -10987,16 +14892,35 @@ public Builder mergeFrom(
                   } // case 18
                 case 26:
                   {
-                    input.readMessage(getTriggerFieldBuilder().getBuilder(), extensionRegistry);
+                    input.readMessage(
+                        getEvaluationIntervalFieldBuilder().getBuilder(), extensionRegistry);
                     bitField0_ |= 0x00000004;
                     break;
                   } // case 26
-                case 32:
+                case 34:
                   {
-                    evaluationMissingData_ = input.readEnum();
+                    com.google.protobuf.MapEntry labels__ =
+                        input.readMessage(
+                            LabelsDefaultEntryHolder.defaultEntry.getParserForType(),
+                            extensionRegistry);
+                    internalGetMutableLabels()
+                        .getMutableMap()
+                        .put(labels__.getKey(), labels__.getValue());
                     bitField0_ |= 0x00000008;
                     break;
-                  } // case 32
+                  } // case 34
+                case 42:
+                  {
+                    ruleGroup_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000010;
+                    break;
+                  } // case 42
+                case 50:
+                  {
+                    alertRule_ = input.readStringRequireUtf8();
+                    bitField0_ |= 0x00000020;
+                    break;
+                  } // case 50
                 default:
                   {
                     if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -11021,11 +14945,12 @@ public Builder mergeFrom(
          *
          *
          * 
-         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-         * query that outputs a boolean stream.
+         * Required. The PromQL expression to evaluate. Every evaluation cycle
+         * this expression is evaluated at the current time, and all resultant
+         * time series become pending/firing alerts. This field must not be empty.
          * 

          *
-         * string query = 1;
+         * string query = 1 [(.google.api.field_behavior) = REQUIRED];
          *
          * @return The query.
          */
@@ -11044,11 +14969,12 @@ public java.lang.String getQuery() {
          *
          *
          * 
-         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-         * query that outputs a boolean stream.
+         * Required. The PromQL expression to evaluate. Every evaluation cycle
+         * this expression is evaluated at the current time, and all resultant
+         * time series become pending/firing alerts. This field must not be empty.
          * 

          *
-         * string query = 1;
+         * string query = 1 [(.google.api.field_behavior) = REQUIRED];
          *
          * @return The bytes for query.
          */
@@ -11067,11 +14993,12 @@ public com.google.protobuf.ByteString getQueryBytes() {
          *
          *
          * 
-         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-         * query that outputs a boolean stream.
+         * Required. The PromQL expression to evaluate. Every evaluation cycle
+         * this expression is evaluated at the current time, and all resultant
+         * time series become pending/firing alerts. This field must not be empty.
          * 

          *
-         * string query = 1;
+         * string query = 1 [(.google.api.field_behavior) = REQUIRED];
          *
          * @param value The query to set.
          * @return This builder for chaining.
@@ -11089,11 +15016,12 @@ public Builder setQuery(java.lang.String value) {
          *
          *
          * 
-         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-         * query that outputs a boolean stream.
+         * Required. The PromQL expression to evaluate. Every evaluation cycle
+         * this expression is evaluated at the current time, and all resultant
+         * time series become pending/firing alerts. This field must not be empty.
          * 

          *
-         * string query = 1;
+         * string query = 1 [(.google.api.field_behavior) = REQUIRED];
          *
          * @return This builder for chaining.
          */
@@ -11107,11 +15035,12 @@ public Builder clearQuery() {
          *
          *
          * 
-         * [Monitoring Query Language](https://cloud.google.com/monitoring/mql)
-         * query that outputs a boolean stream.
+         * Required. The PromQL expression to evaluate. Every evaluation cycle
+         * this expression is evaluated at the current time, and all resultant
+         * time series become pending/firing alerts. This field must not be empty.
          * 

          *
-         * string query = 1;
+         * string query = 1 [(.google.api.field_behavior) = REQUIRED];
          *
          * @param value The bytes for query to set.
          * @return This builder for chaining.
@@ -11137,19 +15066,16 @@ public Builder setQueryBytes(com.google.protobuf.ByteString value) {
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          *
          * @return Whether the duration field is set.
          */
@@ -11160,59 +15086,293 @@ public boolean hasDuration() {
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         *
+         * @return The duration.
+         */
+        public com.google.protobuf.Duration getDuration() {
+          if (durationBuilder_ == null) {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          } else {
+            return durationBuilder_.getMessage();
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        public Builder setDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            duration_ = value;
+          } else {
+            durationBuilder_.setMessage(value);
+          }
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
+          if (durationBuilder_ == null) {
+            duration_ = builderForValue.build();
+          } else {
+            durationBuilder_.setMessage(builderForValue.build());
+          }
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        public Builder mergeDuration(com.google.protobuf.Duration value) {
+          if (durationBuilder_ == null) {
+            if (((bitField0_ & 0x00000002) != 0)
+                && duration_ != null
+                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getDurationBuilder().mergeFrom(value);
+            } else {
+              duration_ = value;
+            }
+          } else {
+            durationBuilder_.mergeFrom(value);
+          }
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        public Builder clearDuration() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          duration_ = null;
+          if (durationBuilder_ != null) {
+            durationBuilder_.dispose();
+            durationBuilder_ = null;
+          }
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        public com.google.protobuf.Duration.Builder getDurationBuilder() {
+          bitField0_ |= 0x00000002;
+          onChanged();
+          return getDurationFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
+          if (durationBuilder_ != null) {
+            return durationBuilder_.getMessageOrBuilder();
+          } else {
+            return duration_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : duration_;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. Alerts are considered firing once their PromQL expression was
+         * evaluated to be "true" for this long.
+         * Alerts whose PromQL expression was not evaluated to be "true" for
+         * long enough are considered pending.
+         * Must be a non-negative duration or missing.
+         * This field is optional. Its default value is zero.
+         * 

+         *
+         * .google.protobuf.Duration duration = 2 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            getDurationFieldBuilder() {
+          if (durationBuilder_ == null) {
+            durationBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.protobuf.Duration,
+                    com.google.protobuf.Duration.Builder,
+                    com.google.protobuf.DurationOrBuilder>(
+                    getDuration(), getParentForChildren(), isClean());
+            duration_ = null;
+          }
+          return durationBuilder_;
+        }
+
+        private com.google.protobuf.Duration evaluationInterval_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            evaluationIntervalBuilder_;
+        /**
+         *
+         *
+         * 
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
+         * 

+         *
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         *
+         * @return Whether the evaluationInterval field is set.
+         */
+        public boolean hasEvaluationInterval() {
+          return ((bitField0_ & 0x00000004) != 0);
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          *
-         * @return The duration.
+         * @return The evaluationInterval.
          */
-        public com.google.protobuf.Duration getDuration() {
-          if (durationBuilder_ == null) {
-            return duration_ == null
+        public com.google.protobuf.Duration getEvaluationInterval() {
+          if (evaluationIntervalBuilder_ == null) {
+            return evaluationInterval_ == null
                 ? com.google.protobuf.Duration.getDefaultInstance()
-                : duration_;
+                : evaluationInterval_;
           } else {
-            return durationBuilder_.getMessage();
+            return evaluationIntervalBuilder_.getMessage();
           }
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder setDuration(com.google.protobuf.Duration value) {
-          if (durationBuilder_ == null) {
+        public Builder setEvaluationInterval(com.google.protobuf.Duration value) {
+          if (evaluationIntervalBuilder_ == null) {
             if (value == null) {
               throw new NullPointerException();
             }
-            duration_ = value;
+            evaluationInterval_ = value;
           } else {
-            durationBuilder_.setMessage(value);
+            evaluationIntervalBuilder_.setMessage(value);
           }
-          bitField0_ |= 0x00000002;
+          bitField0_ |= 0x00000004;
           onChanged();
           return this;
         }
@@ -11220,27 +15380,25 @@ public Builder setDuration(com.google.protobuf.Duration value) {
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue) {
-          if (durationBuilder_ == null) {
-            duration_ = builderForValue.build();
+        public Builder setEvaluationInterval(com.google.protobuf.Duration.Builder builderForValue) {
+          if (evaluationIntervalBuilder_ == null) {
+            evaluationInterval_ = builderForValue.build();
           } else {
-            durationBuilder_.setMessage(builderForValue.build());
+            evaluationIntervalBuilder_.setMessage(builderForValue.build());
           }
-          bitField0_ |= 0x00000002;
+          bitField0_ |= 0x00000004;
           onChanged();
           return this;
         }
@@ -11248,33 +15406,31 @@ public Builder setDuration(com.google.protobuf.Duration.Builder builderForValue)
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder mergeDuration(com.google.protobuf.Duration value) {
-          if (durationBuilder_ == null) {
-            if (((bitField0_ & 0x00000002) != 0)
-                && duration_ != null
-                && duration_ != com.google.protobuf.Duration.getDefaultInstance()) {
-              getDurationBuilder().mergeFrom(value);
+        public Builder mergeEvaluationInterval(com.google.protobuf.Duration value) {
+          if (evaluationIntervalBuilder_ == null) {
+            if (((bitField0_ & 0x00000004) != 0)
+                && evaluationInterval_ != null
+                && evaluationInterval_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getEvaluationIntervalBuilder().mergeFrom(value);
             } else {
-              duration_ = value;
+              evaluationInterval_ = value;
             }
           } else {
-            durationBuilder_.mergeFrom(value);
+            evaluationIntervalBuilder_.mergeFrom(value);
           }
-          bitField0_ |= 0x00000002;
+          bitField0_ |= 0x00000004;
           onChanged();
           return this;
         }
@@ -11282,26 +15438,24 @@ public Builder mergeDuration(com.google.protobuf.Duration value) {
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder clearDuration() {
-          bitField0_ = (bitField0_ & ~0x00000002);
-          duration_ = null;
-          if (durationBuilder_ != null) {
-            durationBuilder_.dispose();
-            durationBuilder_ = null;
+        public Builder clearEvaluationInterval() {
+          bitField0_ = (bitField0_ & ~0x00000004);
+          evaluationInterval_ = null;
+          if (evaluationIntervalBuilder_ != null) {
+            evaluationIntervalBuilder_.dispose();
+            evaluationIntervalBuilder_ = null;
           }
           onChanged();
           return this;
@@ -11310,405 +15464,556 @@ public Builder clearDuration() {
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public com.google.protobuf.Duration.Builder getDurationBuilder() {
-          bitField0_ |= 0x00000002;
+        public com.google.protobuf.Duration.Builder getEvaluationIntervalBuilder() {
+          bitField0_ |= 0x00000004;
           onChanged();
-          return getDurationFieldBuilder().getBuilder();
+          return getEvaluationIntervalFieldBuilder().getBuilder();
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public com.google.protobuf.DurationOrBuilder getDurationOrBuilder() {
-          if (durationBuilder_ != null) {
-            return durationBuilder_.getMessageOrBuilder();
+        public com.google.protobuf.DurationOrBuilder getEvaluationIntervalOrBuilder() {
+          if (evaluationIntervalBuilder_ != null) {
+            return evaluationIntervalBuilder_.getMessageOrBuilder();
           } else {
-            return duration_ == null
+            return evaluationInterval_ == null
                 ? com.google.protobuf.Duration.getDefaultInstance()
-                : duration_;
+                : evaluationInterval_;
           }
         }
         /**
          *
          *
          * 
-         * The amount of time that a time series must violate the
-         * threshold to be considered failing. Currently, only values
-         * that are a multiple of a minute--e.g., 0, 60, 120, or 300
-         * seconds--are supported. If an invalid value is given, an
-         * error will be returned. When choosing a duration, it is useful to
-         * keep in mind the frequency of the underlying time series data
-         * (which may also be affected by any alignments specified in the
-         * `aggregations` field); a good duration is long enough so that a single
-         * outlier does not generate spurious alerts, but short enough that
-         * unhealthy states are detected and alerted on quickly.
+         * Optional. How often this rule should be evaluated.
+         * Must be a positive multiple of 30 seconds or missing.
+         * This field is optional. Its default value is 30 seconds.
+         * If this PrometheusQueryLanguageCondition was generated from a
+         * Prometheus alerting rule, then this value should be taken from the
+         * enclosing rule group.
          * 

          *
-         * .google.protobuf.Duration duration = 2;
+         * 
+         * .google.protobuf.Duration evaluation_interval = 3 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
         private com.google.protobuf.SingleFieldBuilderV3<
                 com.google.protobuf.Duration,
                 com.google.protobuf.Duration.Builder,
                 com.google.protobuf.DurationOrBuilder>
-            getDurationFieldBuilder() {
-          if (durationBuilder_ == null) {
-            durationBuilder_ =
+            getEvaluationIntervalFieldBuilder() {
+          if (evaluationIntervalBuilder_ == null) {
+            evaluationIntervalBuilder_ =
                 new com.google.protobuf.SingleFieldBuilderV3<
                     com.google.protobuf.Duration,
                     com.google.protobuf.Duration.Builder,
                     com.google.protobuf.DurationOrBuilder>(
-                    getDuration(), getParentForChildren(), isClean());
-            duration_ = null;
+                    getEvaluationInterval(), getParentForChildren(), isClean());
+            evaluationInterval_ = null;
           }
-          return durationBuilder_;
+          return evaluationIntervalBuilder_;
         }
 
-        private com.google.monitoring.v3.AlertPolicy.Condition.Trigger trigger_;
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
-            triggerBuilder_;
+        private com.google.protobuf.MapField labels_;
+
+        private com.google.protobuf.MapField
+            internalGetLabels() {
+          if (labels_ == null) {
+            return com.google.protobuf.MapField.emptyMapField(
+                LabelsDefaultEntryHolder.defaultEntry);
+          }
+          return labels_;
+        }
+
+        private com.google.protobuf.MapField
+            internalGetMutableLabels() {
+          if (labels_ == null) {
+            labels_ =
+                com.google.protobuf.MapField.newMapField(LabelsDefaultEntryHolder.defaultEntry);
+          }
+          if (!labels_.isMutable()) {
+            labels_ = labels_.copy();
+          }
+          bitField0_ |= 0x00000008;
+          onChanged();
+          return labels_;
+        }
+
+        public int getLabelsCount() {
+          return internalGetLabels().getMap().size();
+        }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
-         *
-         * @return Whether the trigger field is set.
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public boolean hasTrigger() {
-          return ((bitField0_ & 0x00000004) != 0);
+        @java.lang.Override
+        public boolean containsLabels(java.lang.String key) {
+          if (key == null) {
+            throw new NullPointerException("map key");
+          }
+          return internalGetLabels().getMap().containsKey(key);
+        }
+        /** Use {@link #getLabelsMap()} instead. */
+        @java.lang.Override
+        @java.lang.Deprecated
+        public java.util.Map getLabels() {
+          return getLabelsMap();
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
+         */
+        @java.lang.Override
+        public java.util.Map getLabelsMap() {
+          return internalGetLabels().getMap();
+        }
+        /**
          *
-         * @return The trigger.
+         *
+         * 
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
+         * 

+         *
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger getTrigger() {
-          if (triggerBuilder_ == null) {
-            return trigger_ == null
-                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-                : trigger_;
-          } else {
-            return triggerBuilder_.getMessage();
+        @java.lang.Override
+        public /* nullable */ java.lang.String getLabelsOrDefault(
+            java.lang.String key,
+            /* nullable */
+            java.lang.String defaultValue) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
+          java.util.Map map = internalGetLabels().getMap();
+          return map.containsKey(key) ? map.get(key) : defaultValue;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder setTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
-          if (triggerBuilder_ == null) {
-            if (value == null) {
-              throw new NullPointerException();
-            }
-            trigger_ = value;
-          } else {
-            triggerBuilder_.setMessage(value);
+        @java.lang.Override
+        public java.lang.String getLabelsOrThrow(java.lang.String key) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
-          bitField0_ |= 0x00000004;
-          onChanged();
+          java.util.Map map = internalGetLabels().getMap();
+          if (!map.containsKey(key)) {
+            throw new java.lang.IllegalArgumentException();
+          }
+          return map.get(key);
+        }
+
+        public Builder clearLabels() {
+          bitField0_ = (bitField0_ & ~0x00000008);
+          internalGetMutableLabels().getMutableMap().clear();
           return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder setTrigger(
-            com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder builderForValue) {
-          if (triggerBuilder_ == null) {
-            trigger_ = builderForValue.build();
-          } else {
-            triggerBuilder_.setMessage(builderForValue.build());
+        public Builder removeLabels(java.lang.String key) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
-          bitField0_ |= 0x00000004;
-          onChanged();
+          internalGetMutableLabels().getMutableMap().remove(key);
           return this;
         }
+        /** Use alternate mutation accessors instead. */
+        @java.lang.Deprecated
+        public java.util.Map getMutableLabels() {
+          bitField0_ |= 0x00000008;
+          return internalGetMutableLabels().getMutableMap();
+        }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder mergeTrigger(com.google.monitoring.v3.AlertPolicy.Condition.Trigger value) {
-          if (triggerBuilder_ == null) {
-            if (((bitField0_ & 0x00000004) != 0)
-                && trigger_ != null
-                && trigger_
-                    != com.google.monitoring.v3.AlertPolicy.Condition.Trigger
-                        .getDefaultInstance()) {
-              getTriggerBuilder().mergeFrom(value);
-            } else {
-              trigger_ = value;
-            }
-          } else {
-            triggerBuilder_.mergeFrom(value);
+        public Builder putLabels(java.lang.String key, java.lang.String value) {
+          if (key == null) {
+            throw new NullPointerException("map key");
           }
-          bitField0_ |= 0x00000004;
-          onChanged();
+          if (value == null) {
+            throw new NullPointerException("map value");
+          }
+          internalGetMutableLabels().getMutableMap().put(key, value);
+          bitField0_ |= 0x00000008;
           return this;
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. Labels to add to or overwrite in the PromQL query result.
+         * Label names [must be
+         * valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * Label values can be [templatized by using
+         * variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+         * The only available variable names are the names of the labels in the
+         * PromQL result, including "__name__" and "value". "labels" may be empty.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * map<string, string> labels = 4 [(.google.api.field_behavior) = OPTIONAL];
+         * 
          */
-        public Builder clearTrigger() {
-          bitField0_ = (bitField0_ & ~0x00000004);
-          trigger_ = null;
-          if (triggerBuilder_ != null) {
-            triggerBuilder_.dispose();
-            triggerBuilder_ = null;
-          }
-          onChanged();
+        public Builder putAllLabels(java.util.Map values) {
+          internalGetMutableLabels().getMutableMap().putAll(values);
+          bitField0_ |= 0x00000008;
           return this;
         }
+
+        private java.lang.Object ruleGroup_ = "";
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. The rule group name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must
+         * contain a valid UTF-8 string.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
+         *
+         * @return The ruleGroup.
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder getTriggerBuilder() {
-          bitField0_ |= 0x00000004;
-          onChanged();
-          return getTriggerFieldBuilder().getBuilder();
+        public java.lang.String getRuleGroup() {
+          java.lang.Object ref = ruleGroup_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            ruleGroup_ = s;
+            return s;
+          } else {
+            return (java.lang.String) ref;
+          }
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. The rule group name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must
+         * contain a valid UTF-8 string.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
+         *
+         * @return The bytes for ruleGroup.
          */
-        public com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder
-            getTriggerOrBuilder() {
-          if (triggerBuilder_ != null) {
-            return triggerBuilder_.getMessageOrBuilder();
+        public com.google.protobuf.ByteString getRuleGroupBytes() {
+          java.lang.Object ref = ruleGroup_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            ruleGroup_ = b;
+            return b;
           } else {
-            return trigger_ == null
-                ? com.google.monitoring.v3.AlertPolicy.Condition.Trigger.getDefaultInstance()
-                : trigger_;
+            return (com.google.protobuf.ByteString) ref;
           }
         }
         /**
          *
          *
          * 
-         * The number/percent of time series for which the comparison must hold
-         * in order for the condition to trigger. If unspecified, then the
-         * condition will trigger if the comparison is true for any of the
-         * time series that have been identified by `filter` and `aggregations`,
-         * or by the ratio, if `denominator_filter` and `denominator_aggregations`
-         * are specified.
+         * Optional. The rule group name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must
+         * contain a valid UTF-8 string.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * .google.monitoring.v3.AlertPolicy.Condition.Trigger trigger = 3;
+         * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
+         *
+         * @param value The ruleGroup to set.
+         * @return This builder for chaining.
          */
-        private com.google.protobuf.SingleFieldBuilderV3<
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>
-            getTriggerFieldBuilder() {
-          if (triggerBuilder_ == null) {
-            triggerBuilder_ =
-                new com.google.protobuf.SingleFieldBuilderV3<
-                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger,
-                    com.google.monitoring.v3.AlertPolicy.Condition.Trigger.Builder,
-                    com.google.monitoring.v3.AlertPolicy.Condition.TriggerOrBuilder>(
-                    getTrigger(), getParentForChildren(), isClean());
-            trigger_ = null;
+        public Builder setRuleGroup(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
           }
-          return triggerBuilder_;
+          ruleGroup_ = value;
+          bitField0_ |= 0x00000010;
+          onChanged();
+          return this;
         }
-
-        private int evaluationMissingData_ = 0;
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
+         * Optional. The rule group name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must
+         * contain a valid UTF-8 string.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-         * 
+         * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
          *
-         * @return The enum numeric value on the wire for evaluationMissingData.
+         * @return This builder for chaining.
          */
-        @java.lang.Override
-        public int getEvaluationMissingDataValue() {
-          return evaluationMissingData_;
+        public Builder clearRuleGroup() {
+          ruleGroup_ = getDefaultInstance().getRuleGroup();
+          bitField0_ = (bitField0_ & ~0x00000010);
+          onChanged();
+          return this;
         }
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
+         * Optional. The rule group name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must
+         * contain a valid UTF-8 string.
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-         * 
+         * string rule_group = 5 [(.google.api.field_behavior) = OPTIONAL];
          *
-         * @param value The enum numeric value on the wire for evaluationMissingData to set.
+         * @param value The bytes for ruleGroup to set.
          * @return This builder for chaining.
          */
-        public Builder setEvaluationMissingDataValue(int value) {
-          evaluationMissingData_ = value;
-          bitField0_ |= 0x00000008;
+        public Builder setRuleGroupBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          ruleGroup_ = value;
+          bitField0_ |= 0x00000010;
           onChanged();
           return this;
         }
+
+        private java.lang.Object alertRule_ = "";
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
+         * Optional. The alerting rule name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must be a
+         * [valid Prometheus label
+         * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-         * 
+         * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
          *
-         * @return The evaluationMissingData.
+         * @return The alertRule.
          */
-        @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData
-            getEvaluationMissingData() {
-          com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData result =
-              com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.forNumber(
-                  evaluationMissingData_);
-          return result == null
-              ? com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData.UNRECOGNIZED
-              : result;
+        public java.lang.String getAlertRule() {
+          java.lang.Object ref = alertRule_;
+          if (!(ref instanceof java.lang.String)) {
+            com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+            java.lang.String s = bs.toStringUtf8();
+            alertRule_ = s;
+            return s;
+          } else {
+            return (java.lang.String) ref;
+          }
         }
         /**
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
+         * Optional. The alerting rule name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must be a
+         * [valid Prometheus label
+         * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-         * 
+         * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
          *
-         * @param value The evaluationMissingData to set.
+         * @return The bytes for alertRule.
+         */
+        public com.google.protobuf.ByteString getAlertRuleBytes() {
+          java.lang.Object ref = alertRule_;
+          if (ref instanceof String) {
+            com.google.protobuf.ByteString b =
+                com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+            alertRule_ = b;
+            return b;
+          } else {
+            return (com.google.protobuf.ByteString) ref;
+          }
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. The alerting rule name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must be a
+         * [valid Prometheus label
+         * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * This field may not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
+         *
+         * @param value The alertRule to set.
          * @return This builder for chaining.
          */
-        public Builder setEvaluationMissingData(
-            com.google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData value) {
+        public Builder setAlertRule(java.lang.String value) {
           if (value == null) {
             throw new NullPointerException();
           }
-          bitField0_ |= 0x00000008;
-          evaluationMissingData_ = value.getNumber();
+          alertRule_ = value;
+          bitField0_ |= 0x00000020;
           onChanged();
           return this;
         }
@@ -11716,19 +16021,62 @@ public Builder setEvaluationMissingData(
          *
          *
          * 
-         * A condition control that determines how metric-threshold conditions
-         * are evaluated when data stops arriving.
+         * Optional. The alerting rule name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must be a
+         * [valid Prometheus label
+         * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * This field may not exceed 2048 Unicode characters in length.
          * 

          *
-         * 
-         * .google.monitoring.v3.AlertPolicy.Condition.EvaluationMissingData evaluation_missing_data = 4;
-         * 
+         * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
          *
          * @return This builder for chaining.
          */
-        public Builder clearEvaluationMissingData() {
-          bitField0_ = (bitField0_ & ~0x00000008);
-          evaluationMissingData_ = 0;
+        public Builder clearAlertRule() {
+          alertRule_ = getDefaultInstance().getAlertRule();
+          bitField0_ = (bitField0_ & ~0x00000020);
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Optional. The alerting rule name of this alert in the corresponding
+         * Prometheus configuration file.
+         *
+         * Some external tools may require this field to be populated correctly
+         * in order to refer to the original Prometheus configuration file.
+         * The rule group name and the alert name are necessary to update the
+         * relevant AlertPolicies in case the definition of the rule group changes
+         * in the future.
+         *
+         * This field is optional. If this field is not empty, then it must be a
+         * [valid Prometheus label
+         * name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+         * This field may not exceed 2048 Unicode characters in length.
+         * 

+         *
+         * string alert_rule = 6 [(.google.api.field_behavior) = OPTIONAL];
+         *
+         * @param value The bytes for alertRule to set.
+         * @return This builder for chaining.
+         */
+        public Builder setAlertRuleBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          alertRule_ = value;
+          bitField0_ |= 0x00000020;
           onChanged();
           return this;
         }
@@ -11745,28 +16093,28 @@ public final Builder mergeUnknownFields(
           return super.mergeUnknownFields(unknownFields);
         }
 
-        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
       }
 
-      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
       private static final com.google.monitoring.v3.AlertPolicy.Condition
-              .MonitoringQueryLanguageCondition
+              .PrometheusQueryLanguageCondition
           DEFAULT_INSTANCE;
 
       static {
         DEFAULT_INSTANCE =
-            new com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition();
+            new com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition();
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public static com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           getDefaultInstance() {
         return DEFAULT_INSTANCE;
       }
 
-      private static final com.google.protobuf.Parser PARSER =
-          new com.google.protobuf.AbstractParser() {
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
             @java.lang.Override
-            public MonitoringQueryLanguageCondition parsePartialFrom(
+            public PrometheusQueryLanguageCondition parsePartialFrom(
                 com.google.protobuf.CodedInputStream input,
                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                 throws com.google.protobuf.InvalidProtocolBufferException {
@@ -11786,17 +16134,17 @@ public MonitoringQueryLanguageCondition parsePartialFrom(
             }
           };
 
-      public static com.google.protobuf.Parser parser() {
+      public static com.google.protobuf.Parser parser() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.protobuf.Parser getParserForType() {
+      public com.google.protobuf.Parser getParserForType() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+      public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
           getDefaultInstanceForType() {
         return DEFAULT_INSTANCE;
       }
@@ -11815,6 +16163,7 @@ public enum ConditionCase
       CONDITION_ABSENT(2),
       CONDITION_MATCHED_LOG(20),
       CONDITION_MONITORING_QUERY_LANGUAGE(19),
+      CONDITION_PROMETHEUS_QUERY_LANGUAGE(21),
       CONDITION_NOT_SET(0);
       private final int value;
 
@@ -11841,6 +16190,8 @@ public static ConditionCase forNumber(int value) {
             return CONDITION_MATCHED_LOG;
           case 19:
             return CONDITION_MONITORING_QUERY_LANGUAGE;
+          case 21:
+            return CONDITION_PROMETHEUS_QUERY_LANGUAGE;
           case 0:
             return CONDITION_NOT_SET;
           default:
@@ -11989,1199 +16340,2265 @@ public java.lang.String getDisplayName() {
      *
      *
      * 
-     * A short name or phrase used to identify the condition in dashboards,
-     * notifications, and incidents. To avoid confusion, don't use the same
-     * display name for multiple conditions in the same policy.
+     * A short name or phrase used to identify the condition in dashboards,
+     * notifications, and incidents. To avoid confusion, don't use the same
+     * display name for multiple conditions in the same policy.
+     * 

+     *
+     * string display_name = 6;
+     *
+     * @return The bytes for displayName.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString getDisplayNameBytes() {
+      java.lang.Object ref = displayName_;
+      if (ref instanceof java.lang.String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        displayName_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    public static final int CONDITION_THRESHOLD_FIELD_NUMBER = 1;
+    /**
+     *
+     *
+     * 
+     * A condition that compares a time series against a threshold.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+     * 
+     *
+     * @return Whether the conditionThreshold field is set.
+     */
+    @java.lang.Override
+    public boolean hasConditionThreshold() {
+      return conditionCase_ == 1;
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that compares a time series against a threshold.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+     * 
+     *
+     * @return The conditionThreshold.
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold getConditionThreshold() {
+      if (conditionCase_ == 1) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.getDefaultInstance();
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that compares a time series against a threshold.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+     * 
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder
+        getConditionThresholdOrBuilder() {
+      if (conditionCase_ == 1) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.getDefaultInstance();
+    }
+
+    public static final int CONDITION_ABSENT_FIELD_NUMBER = 2;
+    /**
+     *
+     *
+     * 
+     * A condition that checks that a time series continues to
+     * receive new data points.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+     *
+     * @return Whether the conditionAbsent field is set.
+     */
+    @java.lang.Override
+    public boolean hasConditionAbsent() {
+      return conditionCase_ == 2;
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that checks that a time series continues to
+     * receive new data points.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+     *
+     * @return The conditionAbsent.
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence getConditionAbsent() {
+      if (conditionCase_ == 2) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that checks that a time series continues to
+     * receive new data points.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder
+        getConditionAbsentOrBuilder() {
+      if (conditionCase_ == 2) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+    }
+
+    public static final int CONDITION_MATCHED_LOG_FIELD_NUMBER = 20;
+    /**
+     *
+     *
+     * 
+     * A condition that checks for log messages matching given constraints. If
+     * set, no other conditions can be present.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+     *
+     * @return Whether the conditionMatchedLog field is set.
+     */
+    @java.lang.Override
+    public boolean hasConditionMatchedLog() {
+      return conditionCase_ == 20;
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that checks for log messages matching given constraints. If
+     * set, no other conditions can be present.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+     *
+     * @return The conditionMatchedLog.
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getConditionMatchedLog() {
+      if (conditionCase_ == 20) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that checks for log messages matching given constraints. If
+     * set, no other conditions can be present.
+     * 

+     *
+     * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder
+        getConditionMatchedLogOrBuilder() {
+      if (conditionCase_ == 20) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+    }
+
+    public static final int CONDITION_MONITORING_QUERY_LANGUAGE_FIELD_NUMBER = 19;
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Monitoring Query Language to define
+     * alerts.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+     * 
+     *
+     * @return Whether the conditionMonitoringQueryLanguage field is set.
+     */
+    @java.lang.Override
+    public boolean hasConditionMonitoringQueryLanguage() {
+      return conditionCase_ == 19;
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Monitoring Query Language to define
+     * alerts.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+     * 
+     *
+     * @return The conditionMonitoringQueryLanguage.
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+        getConditionMonitoringQueryLanguage() {
+      if (conditionCase_ == 19) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+            condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          .getDefaultInstance();
+    }
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Monitoring Query Language to define
+     * alerts.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+     * 
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageConditionOrBuilder
+        getConditionMonitoringQueryLanguageOrBuilder() {
+      if (conditionCase_ == 19) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+            condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          .getDefaultInstance();
+    }
+
+    public static final int CONDITION_PROMETHEUS_QUERY_LANGUAGE_FIELD_NUMBER = 21;
+    /**
+     *
+     *
+     * 
+     * A condition that uses the Prometheus query language to define alerts.
      * 

      *
-     * string display_name = 6;
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
+     * 
      *
-     * @return The bytes for displayName.
+     * @return Whether the conditionPrometheusQueryLanguage field is set.
      */
     @java.lang.Override
-    public com.google.protobuf.ByteString getDisplayNameBytes() {
-      java.lang.Object ref = displayName_;
-      if (ref instanceof java.lang.String) {
-        com.google.protobuf.ByteString b =
-            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-        displayName_ = b;
-        return b;
-      } else {
-        return (com.google.protobuf.ByteString) ref;
-      }
+    public boolean hasConditionPrometheusQueryLanguage() {
+      return conditionCase_ == 21;
     }
-
-    public static final int CONDITION_THRESHOLD_FIELD_NUMBER = 1;
     /**
      *
      *
      * 
-     * A condition that compares a time series against a threshold.
+     * A condition that uses the Prometheus query language to define alerts.
      * 

      *
-     * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
      * 
      *
-     * @return Whether the conditionThreshold field is set.
+     * @return The conditionPrometheusQueryLanguage.
      */
     @java.lang.Override
-    public boolean hasConditionThreshold() {
-      return conditionCase_ == 1;
+    public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+        getConditionPrometheusQueryLanguage() {
+      if (conditionCase_ == 21) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+            condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+          .getDefaultInstance();
     }
     /**
      *
      *
      * 
-     * A condition that compares a time series against a threshold.
+     * A condition that uses the Prometheus query language to define alerts.
      * 

      *
-     * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+     * 
+     * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
      * 
-     *
-     * @return The conditionThreshold.
      */
     @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold getConditionThreshold() {
+    public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageConditionOrBuilder
+        getConditionPrometheusQueryLanguageOrBuilder() {
+      if (conditionCase_ == 21) {
+        return (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+            condition_;
+      }
+      return com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+          .getDefaultInstance();
+    }
+
+    private byte memoizedIsInitialized = -1;
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized == 1) return true;
+      if (isInitialized == 0) return false;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    @java.lang.Override
+    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
       if (conditionCase_ == 1) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
+        output.writeMessage(
+            1, (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_);
       }
-      return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.getDefaultInstance();
+      if (conditionCase_ == 2) {
+        output.writeMessage(
+            2, (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_);
+      }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(displayName_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 6, displayName_);
+      }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 12, name_);
+      }
+      if (conditionCase_ == 19) {
+        output.writeMessage(
+            19,
+            (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                condition_);
+      }
+      if (conditionCase_ == 20) {
+        output.writeMessage(
+            20, (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_);
+      }
+      if (conditionCase_ == 21) {
+        output.writeMessage(
+            21,
+            (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+                condition_);
+      }
+      getUnknownFields().writeTo(output);
+    }
+
+    @java.lang.Override
+    public int getSerializedSize() {
+      int size = memoizedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (conditionCase_ == 1) {
+        size +=
+            com.google.protobuf.CodedOutputStream.computeMessageSize(
+                1, (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_);
+      }
+      if (conditionCase_ == 2) {
+        size +=
+            com.google.protobuf.CodedOutputStream.computeMessageSize(
+                2, (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_);
+      }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(displayName_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, displayName_);
+      }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(12, name_);
+      }
+      if (conditionCase_ == 19) {
+        size +=
+            com.google.protobuf.CodedOutputStream.computeMessageSize(
+                19,
+                (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                    condition_);
+      }
+      if (conditionCase_ == 20) {
+        size +=
+            com.google.protobuf.CodedOutputStream.computeMessageSize(
+                20, (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_);
+      }
+      if (conditionCase_ == 21) {
+        size +=
+            com.google.protobuf.CodedOutputStream.computeMessageSize(
+                21,
+                (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+                    condition_);
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSize = size;
+      return size;
+    }
+
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+        return true;
+      }
+      if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition)) {
+        return super.equals(obj);
+      }
+      com.google.monitoring.v3.AlertPolicy.Condition other =
+          (com.google.monitoring.v3.AlertPolicy.Condition) obj;
+
+      if (!getName().equals(other.getName())) return false;
+      if (!getDisplayName().equals(other.getDisplayName())) return false;
+      if (!getConditionCase().equals(other.getConditionCase())) return false;
+      switch (conditionCase_) {
+        case 1:
+          if (!getConditionThreshold().equals(other.getConditionThreshold())) return false;
+          break;
+        case 2:
+          if (!getConditionAbsent().equals(other.getConditionAbsent())) return false;
+          break;
+        case 20:
+          if (!getConditionMatchedLog().equals(other.getConditionMatchedLog())) return false;
+          break;
+        case 19:
+          if (!getConditionMonitoringQueryLanguage()
+              .equals(other.getConditionMonitoringQueryLanguage())) return false;
+          break;
+        case 21:
+          if (!getConditionPrometheusQueryLanguage()
+              .equals(other.getConditionPrometheusQueryLanguage())) return false;
+          break;
+        case 0:
+        default:
+      }
+      if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+      return true;
+    }
+
+    @java.lang.Override
+    public int hashCode() {
+      if (memoizedHashCode != 0) {
+        return memoizedHashCode;
+      }
+      int hash = 41;
+      hash = (19 * hash) + getDescriptor().hashCode();
+      hash = (37 * hash) + NAME_FIELD_NUMBER;
+      hash = (53 * hash) + getName().hashCode();
+      hash = (37 * hash) + DISPLAY_NAME_FIELD_NUMBER;
+      hash = (53 * hash) + getDisplayName().hashCode();
+      switch (conditionCase_) {
+        case 1:
+          hash = (37 * hash) + CONDITION_THRESHOLD_FIELD_NUMBER;
+          hash = (53 * hash) + getConditionThreshold().hashCode();
+          break;
+        case 2:
+          hash = (37 * hash) + CONDITION_ABSENT_FIELD_NUMBER;
+          hash = (53 * hash) + getConditionAbsent().hashCode();
+          break;
+        case 20:
+          hash = (37 * hash) + CONDITION_MATCHED_LOG_FIELD_NUMBER;
+          hash = (53 * hash) + getConditionMatchedLog().hashCode();
+          break;
+        case 19:
+          hash = (37 * hash) + CONDITION_MONITORING_QUERY_LANGUAGE_FIELD_NUMBER;
+          hash = (53 * hash) + getConditionMonitoringQueryLanguage().hashCode();
+          break;
+        case 21:
+          hash = (37 * hash) + CONDITION_PROMETHEUS_QUERY_LANGUAGE_FIELD_NUMBER;
+          hash = (53 * hash) + getConditionPrometheusQueryLanguage().hashCode();
+          break;
+        case 0:
+        default:
+      }
+      hash = (29 * hash) + getUnknownFields().hashCode();
+      memoizedHashCode = hash;
+      return hash;
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(java.nio.ByteBuffer data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        java.io.InputStream input) throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+          PARSER, input, extensionRegistry);
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseDelimitedFrom(
+        java.io.InputStream input) throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
     }
-    /**
-     *
-     *
-     * 
-     * A condition that compares a time series against a threshold.
-     * 

-     *
-     * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
-     * 
-     */
-    @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder
-        getConditionThresholdOrBuilder() {
-      if (conditionCase_ == 1) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
-      }
-      return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.getDefaultInstance();
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseDelimitedFrom(
+        java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+          PARSER, input, extensionRegistry);
     }
 
-    public static final int CONDITION_ABSENT_FIELD_NUMBER = 2;
-    /**
-     *
-     *
-     * 
-     * A condition that checks that a time series continues to
-     * receive new data points.
-     * 

-     *
-     * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-     *
-     * @return Whether the conditionAbsent field is set.
-     */
-    @java.lang.Override
-    public boolean hasConditionAbsent() {
-      return conditionCase_ == 2;
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
     }
-    /**
-     *
-     *
-     * 
-     * A condition that checks that a time series continues to
-     * receive new data points.
-     * 

-     *
-     * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-     *
-     * @return The conditionAbsent.
-     */
-    @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence getConditionAbsent() {
-      if (conditionCase_ == 2) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
-      }
-      return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+          PARSER, input, extensionRegistry);
     }
-    /**
-     *
-     *
-     * 
-     * A condition that checks that a time series continues to
-     * receive new data points.
-     * 

-     *
-     * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-     */
+
     @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder
-        getConditionAbsentOrBuilder() {
-      if (conditionCase_ == 2) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
-      }
-      return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+    public Builder newBuilderForType() {
+      return newBuilder();
+    }
+
+    public static Builder newBuilder() {
+      return DEFAULT_INSTANCE.toBuilder();
+    }
+
+    public static Builder newBuilder(com.google.monitoring.v3.AlertPolicy.Condition prototype) {
+      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
     }
 
-    public static final int CONDITION_MATCHED_LOG_FIELD_NUMBER = 20;
-    /**
-     *
-     *
-     * 
-     * A condition that checks for log messages matching given constraints. If
-     * set, no other conditions can be present.
-     * 

-     *
-     * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-     *
-     * @return Whether the conditionMatchedLog field is set.
-     */
     @java.lang.Override
-    public boolean hasConditionMatchedLog() {
-      return conditionCase_ == 20;
+    public Builder toBuilder() {
+      return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
     }
-    /**
-     *
-     *
-     * 
-     * A condition that checks for log messages matching given constraints. If
-     * set, no other conditions can be present.
-     * 

-     *
-     * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-     *
-     * @return The conditionMatchedLog.
-     */
+
     @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getConditionMatchedLog() {
-      if (conditionCase_ == 20) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
-      }
-      return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
     }
     /**
      *
      *
      * 
-     * A condition that checks for log messages matching given constraints. If
-     * set, no other conditions can be present.
+     * A condition is a true/false test that determines when an alerting policy
+     * should open an incident. If a condition evaluates to true, it signifies
+     * that something is wrong.
      * 

      *
-     * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+     * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition}
      */
-    @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder
-        getConditionMatchedLogOrBuilder() {
-      if (conditionCase_ == 20) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
+    public static final class Builder
+        extends com.google.protobuf.GeneratedMessageV3.Builder
+        implements
+        // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition)
+        com.google.monitoring.v3.AlertPolicy.ConditionOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor;
+      }
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                com.google.monitoring.v3.AlertPolicy.Condition.class,
+                com.google.monitoring.v3.AlertPolicy.Condition.Builder.class);
+      }
+
+      // Construct using com.google.monitoring.v3.AlertPolicy.Condition.newBuilder()
+      private Builder() {}
+
+      private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        super(parent);
+      }
+
+      @java.lang.Override
+      public Builder clear() {
+        super.clear();
+        bitField0_ = 0;
+        name_ = "";
+        displayName_ = "";
+        if (conditionThresholdBuilder_ != null) {
+          conditionThresholdBuilder_.clear();
+        }
+        if (conditionAbsentBuilder_ != null) {
+          conditionAbsentBuilder_.clear();
+        }
+        if (conditionMatchedLogBuilder_ != null) {
+          conditionMatchedLogBuilder_.clear();
+        }
+        if (conditionMonitoringQueryLanguageBuilder_ != null) {
+          conditionMonitoringQueryLanguageBuilder_.clear();
+        }
+        if (conditionPrometheusQueryLanguageBuilder_ != null) {
+          conditionPrometheusQueryLanguageBuilder_.clear();
+        }
+        conditionCase_ = 0;
+        condition_ = null;
+        return this;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor;
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition getDefaultInstanceForType() {
+        return com.google.monitoring.v3.AlertPolicy.Condition.getDefaultInstance();
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition build() {
+        com.google.monitoring.v3.AlertPolicy.Condition result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition buildPartial() {
+        com.google.monitoring.v3.AlertPolicy.Condition result =
+            new com.google.monitoring.v3.AlertPolicy.Condition(this);
+        if (bitField0_ != 0) {
+          buildPartial0(result);
+        }
+        buildPartialOneofs(result);
+        onBuilt();
+        return result;
+      }
+
+      private void buildPartial0(com.google.monitoring.v3.AlertPolicy.Condition result) {
+        int from_bitField0_ = bitField0_;
+        if (((from_bitField0_ & 0x00000001) != 0)) {
+          result.name_ = name_;
+        }
+        if (((from_bitField0_ & 0x00000002) != 0)) {
+          result.displayName_ = displayName_;
+        }
+      }
+
+      private void buildPartialOneofs(com.google.monitoring.v3.AlertPolicy.Condition result) {
+        result.conditionCase_ = conditionCase_;
+        result.condition_ = this.condition_;
+        if (conditionCase_ == 1 && conditionThresholdBuilder_ != null) {
+          result.condition_ = conditionThresholdBuilder_.build();
+        }
+        if (conditionCase_ == 2 && conditionAbsentBuilder_ != null) {
+          result.condition_ = conditionAbsentBuilder_.build();
+        }
+        if (conditionCase_ == 20 && conditionMatchedLogBuilder_ != null) {
+          result.condition_ = conditionMatchedLogBuilder_.build();
+        }
+        if (conditionCase_ == 19 && conditionMonitoringQueryLanguageBuilder_ != null) {
+          result.condition_ = conditionMonitoringQueryLanguageBuilder_.build();
+        }
+        if (conditionCase_ == 21 && conditionPrometheusQueryLanguageBuilder_ != null) {
+          result.condition_ = conditionPrometheusQueryLanguageBuilder_.build();
+        }
       }
-      return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
-    }
 
-    public static final int CONDITION_MONITORING_QUERY_LANGUAGE_FIELD_NUMBER = 19;
-    /**
-     *
-     *
-     * 
-     * A condition that uses the Monitoring Query Language to define
-     * alerts.
-     * 

-     *
-     * 
-     * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-     * 
-     *
-     * @return Whether the conditionMonitoringQueryLanguage field is set.
-     */
-    @java.lang.Override
-    public boolean hasConditionMonitoringQueryLanguage() {
-      return conditionCase_ == 19;
-    }
-    /**
-     *
-     *
-     * 
-     * A condition that uses the Monitoring Query Language to define
-     * alerts.
-     * 

-     *
-     * 
-     * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-     * 
-     *
-     * @return The conditionMonitoringQueryLanguage.
-     */
-    @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-        getConditionMonitoringQueryLanguage() {
-      if (conditionCase_ == 19) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-            condition_;
-      }
-      return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-          .getDefaultInstance();
-    }
-    /**
-     *
-     *
-     * 
-     * A condition that uses the Monitoring Query Language to define
-     * alerts.
-     * 

-     *
-     * 
-     * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-     * 
-     */
-    @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageConditionOrBuilder
-        getConditionMonitoringQueryLanguageOrBuilder() {
-      if (conditionCase_ == 19) {
-        return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-            condition_;
+      @java.lang.Override
+      public Builder clone() {
+        return super.clone();
       }
-      return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-          .getDefaultInstance();
-    }
 
-    private byte memoizedIsInitialized = -1;
+      @java.lang.Override
+      public Builder setField(
+          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+        return super.setField(field, value);
+      }
 
-    @java.lang.Override
-    public final boolean isInitialized() {
-      byte isInitialized = memoizedIsInitialized;
-      if (isInitialized == 1) return true;
-      if (isInitialized == 0) return false;
+      @java.lang.Override
+      public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+        return super.clearField(field);
+      }
 
-      memoizedIsInitialized = 1;
-      return true;
-    }
+      @java.lang.Override
+      public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+        return super.clearOneof(oneof);
+      }
 
-    @java.lang.Override
-    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-      if (conditionCase_ == 1) {
-        output.writeMessage(
-            1, (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_);
+      @java.lang.Override
+      public Builder setRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field,
+          int index,
+          java.lang.Object value) {
+        return super.setRepeatedField(field, index, value);
       }
-      if (conditionCase_ == 2) {
-        output.writeMessage(
-            2, (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_);
+
+      @java.lang.Override
+      public Builder addRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+        return super.addRepeatedField(field, value);
       }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(displayName_)) {
-        com.google.protobuf.GeneratedMessageV3.writeString(output, 6, displayName_);
+
+      @java.lang.Override
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition) {
+          return mergeFrom((com.google.monitoring.v3.AlertPolicy.Condition) other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
       }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
-        com.google.protobuf.GeneratedMessageV3.writeString(output, 12, name_);
+
+      public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.Condition other) {
+        if (other == com.google.monitoring.v3.AlertPolicy.Condition.getDefaultInstance())
+          return this;
+        if (!other.getName().isEmpty()) {
+          name_ = other.name_;
+          bitField0_ |= 0x00000001;
+          onChanged();
+        }
+        if (!other.getDisplayName().isEmpty()) {
+          displayName_ = other.displayName_;
+          bitField0_ |= 0x00000002;
+          onChanged();
+        }
+        switch (other.getConditionCase()) {
+          case CONDITION_THRESHOLD:
+            {
+              mergeConditionThreshold(other.getConditionThreshold());
+              break;
+            }
+          case CONDITION_ABSENT:
+            {
+              mergeConditionAbsent(other.getConditionAbsent());
+              break;
+            }
+          case CONDITION_MATCHED_LOG:
+            {
+              mergeConditionMatchedLog(other.getConditionMatchedLog());
+              break;
+            }
+          case CONDITION_MONITORING_QUERY_LANGUAGE:
+            {
+              mergeConditionMonitoringQueryLanguage(other.getConditionMonitoringQueryLanguage());
+              break;
+            }
+          case CONDITION_PROMETHEUS_QUERY_LANGUAGE:
+            {
+              mergeConditionPrometheusQueryLanguage(other.getConditionPrometheusQueryLanguage());
+              break;
+            }
+          case CONDITION_NOT_SET:
+            {
+              break;
+            }
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        onChanged();
+        return this;
       }
-      if (conditionCase_ == 19) {
-        output.writeMessage(
-            19,
-            (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-                condition_);
+
+      @java.lang.Override
+      public final boolean isInitialized() {
+        return true;
       }
-      if (conditionCase_ == 20) {
-        output.writeMessage(
-            20, (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_);
+
+      @java.lang.Override
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        if (extensionRegistry == null) {
+          throw new java.lang.NullPointerException();
+        }
+        try {
+          boolean done = false;
+          while (!done) {
+            int tag = input.readTag();
+            switch (tag) {
+              case 0:
+                done = true;
+                break;
+              case 10:
+                {
+                  input.readMessage(
+                      getConditionThresholdFieldBuilder().getBuilder(), extensionRegistry);
+                  conditionCase_ = 1;
+                  break;
+                } // case 10
+              case 18:
+                {
+                  input.readMessage(
+                      getConditionAbsentFieldBuilder().getBuilder(), extensionRegistry);
+                  conditionCase_ = 2;
+                  break;
+                } // case 18
+              case 50:
+                {
+                  displayName_ = input.readStringRequireUtf8();
+                  bitField0_ |= 0x00000002;
+                  break;
+                } // case 50
+              case 98:
+                {
+                  name_ = input.readStringRequireUtf8();
+                  bitField0_ |= 0x00000001;
+                  break;
+                } // case 98
+              case 154:
+                {
+                  input.readMessage(
+                      getConditionMonitoringQueryLanguageFieldBuilder().getBuilder(),
+                      extensionRegistry);
+                  conditionCase_ = 19;
+                  break;
+                } // case 154
+              case 162:
+                {
+                  input.readMessage(
+                      getConditionMatchedLogFieldBuilder().getBuilder(), extensionRegistry);
+                  conditionCase_ = 20;
+                  break;
+                } // case 162
+              case 170:
+                {
+                  input.readMessage(
+                      getConditionPrometheusQueryLanguageFieldBuilder().getBuilder(),
+                      extensionRegistry);
+                  conditionCase_ = 21;
+                  break;
+                } // case 170
+              default:
+                {
+                  if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                    done = true; // was an endgroup tag
+                  }
+                  break;
+                } // default:
+            } // switch (tag)
+          } // while (!done)
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.unwrapIOException();
+        } finally {
+          onChanged();
+        } // finally
+        return this;
       }
-      getUnknownFields().writeTo(output);
-    }
 
-    @java.lang.Override
-    public int getSerializedSize() {
-      int size = memoizedSize;
-      if (size != -1) return size;
+      private int conditionCase_ = 0;
+      private java.lang.Object condition_;
 
-      size = 0;
-      if (conditionCase_ == 1) {
-        size +=
-            com.google.protobuf.CodedOutputStream.computeMessageSize(
-                1, (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_);
-      }
-      if (conditionCase_ == 2) {
-        size +=
-            com.google.protobuf.CodedOutputStream.computeMessageSize(
-                2, (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_);
-      }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(displayName_)) {
-        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, displayName_);
-      }
-      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
-        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(12, name_);
-      }
-      if (conditionCase_ == 19) {
-        size +=
-            com.google.protobuf.CodedOutputStream.computeMessageSize(
-                19,
-                (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-                    condition_);
+      public ConditionCase getConditionCase() {
+        return ConditionCase.forNumber(conditionCase_);
       }
-      if (conditionCase_ == 20) {
-        size +=
-            com.google.protobuf.CodedOutputStream.computeMessageSize(
-                20, (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_);
+
+      public Builder clearCondition() {
+        conditionCase_ = 0;
+        condition_ = null;
+        onChanged();
+        return this;
       }
-      size += getUnknownFields().getSerializedSize();
-      memoizedSize = size;
-      return size;
-    }
 
-    @java.lang.Override
-    public boolean equals(final java.lang.Object obj) {
-      if (obj == this) {
-        return true;
+      private int bitField0_;
+
+      private java.lang.Object name_ = "";
+      /**
+       *
+       *
+       * 
+       * Required if the condition exists. The unique resource name for this
+       * condition. Its format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       *
+       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
+       * condition is created as part of a new or updated alerting policy.
+       *
+       * When calling the
+       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
+       * method, do not include the `name` field in the conditions of the
+       * requested alerting policy. Cloud Monitoring creates the
+       * condition identifiers and includes them in the new policy.
+       *
+       * When calling the
+       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
+       * method to update a policy, including a condition `name` causes the
+       * existing condition to be updated. Conditions without names are added to
+       * the updated policy. Existing conditions are deleted if they are not
+       * updated.
+       *
+       * Best practice is to preserve `[CONDITION_ID]` if you make only small
+       * changes, such as those to condition thresholds, durations, or trigger
+       * values.  Otherwise, treat the change as a new condition and let the
+       * existing condition be deleted.
+       * 

+       *
+       * string name = 12;
+       *
+       * @return The name.
+       */
+      public java.lang.String getName() {
+        java.lang.Object ref = name_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          name_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
       }
-      if (!(obj instanceof com.google.monitoring.v3.AlertPolicy.Condition)) {
-        return super.equals(obj);
+      /**
+       *
+       *
+       * 
+       * Required if the condition exists. The unique resource name for this
+       * condition. Its format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       *
+       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
+       * condition is created as part of a new or updated alerting policy.
+       *
+       * When calling the
+       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
+       * method, do not include the `name` field in the conditions of the
+       * requested alerting policy. Cloud Monitoring creates the
+       * condition identifiers and includes them in the new policy.
+       *
+       * When calling the
+       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
+       * method to update a policy, including a condition `name` causes the
+       * existing condition to be updated. Conditions without names are added to
+       * the updated policy. Existing conditions are deleted if they are not
+       * updated.
+       *
+       * Best practice is to preserve `[CONDITION_ID]` if you make only small
+       * changes, such as those to condition thresholds, durations, or trigger
+       * values.  Otherwise, treat the change as a new condition and let the
+       * existing condition be deleted.
+       * 

+       *
+       * string name = 12;
+       *
+       * @return The bytes for name.
+       */
+      public com.google.protobuf.ByteString getNameBytes() {
+        java.lang.Object ref = name_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          name_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
       }
-      com.google.monitoring.v3.AlertPolicy.Condition other =
-          (com.google.monitoring.v3.AlertPolicy.Condition) obj;
-
-      if (!getName().equals(other.getName())) return false;
-      if (!getDisplayName().equals(other.getDisplayName())) return false;
-      if (!getConditionCase().equals(other.getConditionCase())) return false;
-      switch (conditionCase_) {
-        case 1:
-          if (!getConditionThreshold().equals(other.getConditionThreshold())) return false;
-          break;
-        case 2:
-          if (!getConditionAbsent().equals(other.getConditionAbsent())) return false;
-          break;
-        case 20:
-          if (!getConditionMatchedLog().equals(other.getConditionMatchedLog())) return false;
-          break;
-        case 19:
-          if (!getConditionMonitoringQueryLanguage()
-              .equals(other.getConditionMonitoringQueryLanguage())) return false;
-          break;
-        case 0:
-        default:
+      /**
+       *
+       *
+       * 
+       * Required if the condition exists. The unique resource name for this
+       * condition. Its format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       *
+       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
+       * condition is created as part of a new or updated alerting policy.
+       *
+       * When calling the
+       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
+       * method, do not include the `name` field in the conditions of the
+       * requested alerting policy. Cloud Monitoring creates the
+       * condition identifiers and includes them in the new policy.
+       *
+       * When calling the
+       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
+       * method to update a policy, including a condition `name` causes the
+       * existing condition to be updated. Conditions without names are added to
+       * the updated policy. Existing conditions are deleted if they are not
+       * updated.
+       *
+       * Best practice is to preserve `[CONDITION_ID]` if you make only small
+       * changes, such as those to condition thresholds, durations, or trigger
+       * values.  Otherwise, treat the change as a new condition and let the
+       * existing condition be deleted.
+       * 

+       *
+       * string name = 12;
+       *
+       * @param value The name to set.
+       * @return This builder for chaining.
+       */
+      public Builder setName(java.lang.String value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        name_ = value;
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Required if the condition exists. The unique resource name for this
+       * condition. Its format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       *
+       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
+       * condition is created as part of a new or updated alerting policy.
+       *
+       * When calling the
+       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
+       * method, do not include the `name` field in the conditions of the
+       * requested alerting policy. Cloud Monitoring creates the
+       * condition identifiers and includes them in the new policy.
+       *
+       * When calling the
+       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
+       * method to update a policy, including a condition `name` causes the
+       * existing condition to be updated. Conditions without names are added to
+       * the updated policy. Existing conditions are deleted if they are not
+       * updated.
+       *
+       * Best practice is to preserve `[CONDITION_ID]` if you make only small
+       * changes, such as those to condition thresholds, durations, or trigger
+       * values.  Otherwise, treat the change as a new condition and let the
+       * existing condition be deleted.
+       * 

+       *
+       * string name = 12;
+       *
+       * @return This builder for chaining.
+       */
+      public Builder clearName() {
+        name_ = getDefaultInstance().getName();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Required if the condition exists. The unique resource name for this
+       * condition. Its format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       *
+       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
+       * condition is created as part of a new or updated alerting policy.
+       *
+       * When calling the
+       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
+       * method, do not include the `name` field in the conditions of the
+       * requested alerting policy. Cloud Monitoring creates the
+       * condition identifiers and includes them in the new policy.
+       *
+       * When calling the
+       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
+       * method to update a policy, including a condition `name` causes the
+       * existing condition to be updated. Conditions without names are added to
+       * the updated policy. Existing conditions are deleted if they are not
+       * updated.
+       *
+       * Best practice is to preserve `[CONDITION_ID]` if you make only small
+       * changes, such as those to condition thresholds, durations, or trigger
+       * values.  Otherwise, treat the change as a new condition and let the
+       * existing condition be deleted.
+       * 

+       *
+       * string name = 12;
+       *
+       * @param value The bytes for name to set.
+       * @return This builder for chaining.
+       */
+      public Builder setNameBytes(com.google.protobuf.ByteString value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        checkByteStringIsUtf8(value);
+        name_ = value;
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return this;
       }
-      if (!getUnknownFields().equals(other.getUnknownFields())) return false;
-      return true;
-    }
 
-    @java.lang.Override
-    public int hashCode() {
-      if (memoizedHashCode != 0) {
-        return memoizedHashCode;
+      private java.lang.Object displayName_ = "";
+      /**
+       *
+       *
+       * 
+       * A short name or phrase used to identify the condition in dashboards,
+       * notifications, and incidents. To avoid confusion, don't use the same
+       * display name for multiple conditions in the same policy.
+       * 

+       *
+       * string display_name = 6;
+       *
+       * @return The displayName.
+       */
+      public java.lang.String getDisplayName() {
+        java.lang.Object ref = displayName_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          displayName_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
       }
-      int hash = 41;
-      hash = (19 * hash) + getDescriptor().hashCode();
-      hash = (37 * hash) + NAME_FIELD_NUMBER;
-      hash = (53 * hash) + getName().hashCode();
-      hash = (37 * hash) + DISPLAY_NAME_FIELD_NUMBER;
-      hash = (53 * hash) + getDisplayName().hashCode();
-      switch (conditionCase_) {
-        case 1:
-          hash = (37 * hash) + CONDITION_THRESHOLD_FIELD_NUMBER;
-          hash = (53 * hash) + getConditionThreshold().hashCode();
-          break;
-        case 2:
-          hash = (37 * hash) + CONDITION_ABSENT_FIELD_NUMBER;
-          hash = (53 * hash) + getConditionAbsent().hashCode();
-          break;
-        case 20:
-          hash = (37 * hash) + CONDITION_MATCHED_LOG_FIELD_NUMBER;
-          hash = (53 * hash) + getConditionMatchedLog().hashCode();
-          break;
-        case 19:
-          hash = (37 * hash) + CONDITION_MONITORING_QUERY_LANGUAGE_FIELD_NUMBER;
-          hash = (53 * hash) + getConditionMonitoringQueryLanguage().hashCode();
-          break;
-        case 0:
-        default:
+      /**
+       *
+       *
+       * 
+       * A short name or phrase used to identify the condition in dashboards,
+       * notifications, and incidents. To avoid confusion, don't use the same
+       * display name for multiple conditions in the same policy.
+       * 

+       *
+       * string display_name = 6;
+       *
+       * @return The bytes for displayName.
+       */
+      public com.google.protobuf.ByteString getDisplayNameBytes() {
+        java.lang.Object ref = displayName_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b =
+              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+          displayName_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
       }
-      hash = (29 * hash) + getUnknownFields().hashCode();
-      memoizedHashCode = hash;
-      return hash;
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(java.nio.ByteBuffer data)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      return PARSER.parseFrom(data);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      return PARSER.parseFrom(data, extensionRegistry);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        com.google.protobuf.ByteString data)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      return PARSER.parseFrom(data);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        com.google.protobuf.ByteString data,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      return PARSER.parseFrom(data, extensionRegistry);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(byte[] data)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      return PARSER.parseFrom(data);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws com.google.protobuf.InvalidProtocolBufferException {
-      return PARSER.parseFrom(data, extensionRegistry);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        java.io.InputStream input) throws java.io.IOException {
-      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws java.io.IOException {
-      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
-          PARSER, input, extensionRegistry);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseDelimitedFrom(
-        java.io.InputStream input) throws java.io.IOException {
-      return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseDelimitedFrom(
-        java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws java.io.IOException {
-      return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
-          PARSER, input, extensionRegistry);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        com.google.protobuf.CodedInputStream input) throws java.io.IOException {
-      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition parseFrom(
-        com.google.protobuf.CodedInputStream input,
-        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-        throws java.io.IOException {
-      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
-          PARSER, input, extensionRegistry);
-    }
-
-    @java.lang.Override
-    public Builder newBuilderForType() {
-      return newBuilder();
-    }
-
-    public static Builder newBuilder() {
-      return DEFAULT_INSTANCE.toBuilder();
-    }
-
-    public static Builder newBuilder(com.google.monitoring.v3.AlertPolicy.Condition prototype) {
-      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
-    }
-
-    @java.lang.Override
-    public Builder toBuilder() {
-      return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
-    }
-
-    @java.lang.Override
-    protected Builder newBuilderForType(
-        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-      Builder builder = new Builder(parent);
-      return builder;
-    }
-    /**
-     *
-     *
-     * 
-     * A condition is a true/false test that determines when an alerting policy
-     * should open an incident. If a condition evaluates to true, it signifies
-     * that something is wrong.
-     * 

-     *
-     * Protobuf type {@code google.monitoring.v3.AlertPolicy.Condition}
-     */
-    public static final class Builder
-        extends com.google.protobuf.GeneratedMessageV3.Builder
-        implements
-        // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.Condition)
-        com.google.monitoring.v3.AlertPolicy.ConditionOrBuilder {
-      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor;
+      /**
+       *
+       *
+       * 
+       * A short name or phrase used to identify the condition in dashboards,
+       * notifications, and incidents. To avoid confusion, don't use the same
+       * display name for multiple conditions in the same policy.
+       * 

+       *
+       * string display_name = 6;
+       *
+       * @param value The displayName to set.
+       * @return This builder for chaining.
+       */
+      public Builder setDisplayName(java.lang.String value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        displayName_ = value;
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return this;
       }
-
-      @java.lang.Override
-      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-          internalGetFieldAccessorTable() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_fieldAccessorTable
-            .ensureFieldAccessorsInitialized(
-                com.google.monitoring.v3.AlertPolicy.Condition.class,
-                com.google.monitoring.v3.AlertPolicy.Condition.Builder.class);
+      /**
+       *
+       *
+       * 
+       * A short name or phrase used to identify the condition in dashboards,
+       * notifications, and incidents. To avoid confusion, don't use the same
+       * display name for multiple conditions in the same policy.
+       * 

+       *
+       * string display_name = 6;
+       *
+       * @return This builder for chaining.
+       */
+      public Builder clearDisplayName() {
+        displayName_ = getDefaultInstance().getDisplayName();
+        bitField0_ = (bitField0_ & ~0x00000002);
+        onChanged();
+        return this;
       }
-
-      // Construct using com.google.monitoring.v3.AlertPolicy.Condition.newBuilder()
-      private Builder() {}
-
-      private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-        super(parent);
+      /**
+       *
+       *
+       * 
+       * A short name or phrase used to identify the condition in dashboards,
+       * notifications, and incidents. To avoid confusion, don't use the same
+       * display name for multiple conditions in the same policy.
+       * 

+       *
+       * string display_name = 6;
+       *
+       * @param value The bytes for displayName to set.
+       * @return This builder for chaining.
+       */
+      public Builder setDisplayNameBytes(com.google.protobuf.ByteString value) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        checkByteStringIsUtf8(value);
+        displayName_ = value;
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return this;
       }
 
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder>
+          conditionThresholdBuilder_;
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       *
+       * @return Whether the conditionThreshold field is set.
+       */
       @java.lang.Override
-      public Builder clear() {
-        super.clear();
-        bitField0_ = 0;
-        name_ = "";
-        displayName_ = "";
-        if (conditionThresholdBuilder_ != null) {
-          conditionThresholdBuilder_.clear();
+      public boolean hasConditionThreshold() {
+        return conditionCase_ == 1;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       *
+       * @return The conditionThreshold.
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          getConditionThreshold() {
+        if (conditionThresholdBuilder_ == null) {
+          if (conditionCase_ == 1) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+              .getDefaultInstance();
+        } else {
+          if (conditionCase_ == 1) {
+            return conditionThresholdBuilder_.getMessage();
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+              .getDefaultInstance();
         }
-        if (conditionAbsentBuilder_ != null) {
-          conditionAbsentBuilder_.clear();
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      public Builder setConditionThreshold(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold value) {
+        if (conditionThresholdBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          condition_ = value;
+          onChanged();
+        } else {
+          conditionThresholdBuilder_.setMessage(value);
         }
-        if (conditionMatchedLogBuilder_ != null) {
-          conditionMatchedLogBuilder_.clear();
+        conditionCase_ = 1;
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      public Builder setConditionThreshold(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder builderForValue) {
+        if (conditionThresholdBuilder_ == null) {
+          condition_ = builderForValue.build();
+          onChanged();
+        } else {
+          conditionThresholdBuilder_.setMessage(builderForValue.build());
         }
-        if (conditionMonitoringQueryLanguageBuilder_ != null) {
-          conditionMonitoringQueryLanguageBuilder_.clear();
+        conditionCase_ = 1;
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      public Builder mergeConditionThreshold(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold value) {
+        if (conditionThresholdBuilder_ == null) {
+          if (conditionCase_ == 1
+              && condition_
+                  != com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                      .getDefaultInstance()) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.newBuilder(
+                        (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_)
+                    .mergeFrom(value)
+                    .buildPartial();
+          } else {
+            condition_ = value;
+          }
+          onChanged();
+        } else {
+          if (conditionCase_ == 1) {
+            conditionThresholdBuilder_.mergeFrom(value);
+          } else {
+            conditionThresholdBuilder_.setMessage(value);
+          }
+        }
+        conditionCase_ = 1;
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      public Builder clearConditionThreshold() {
+        if (conditionThresholdBuilder_ == null) {
+          if (conditionCase_ == 1) {
+            conditionCase_ = 0;
+            condition_ = null;
+            onChanged();
+          }
+        } else {
+          if (conditionCase_ == 1) {
+            conditionCase_ = 0;
+            condition_ = null;
+          }
+          conditionThresholdBuilder_.clear();
+        }
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder
+          getConditionThresholdBuilder() {
+        return getConditionThresholdFieldBuilder().getBuilder();
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder
+          getConditionThresholdOrBuilder() {
+        if ((conditionCase_ == 1) && (conditionThresholdBuilder_ != null)) {
+          return conditionThresholdBuilder_.getMessageOrBuilder();
+        } else {
+          if (conditionCase_ == 1) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+              .getDefaultInstance();
         }
-        conditionCase_ = 0;
-        condition_ = null;
-        return this;
       }
-
-      @java.lang.Override
-      public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor;
+      /**
+       *
+       *
+       * 
+       * A condition that compares a time series against a threshold.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder>
+          getConditionThresholdFieldBuilder() {
+        if (conditionThresholdBuilder_ == null) {
+          if (!(conditionCase_ == 1)) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.getDefaultInstance();
+          }
+          conditionThresholdBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder>(
+                  (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_,
+                  getParentForChildren(),
+                  isClean());
+          condition_ = null;
+        }
+        conditionCase_ = 1;
+        onChanged();
+        return conditionThresholdBuilder_;
       }
 
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder>
+          conditionAbsentBuilder_;
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       *
+       * @return Whether the conditionAbsent field is set.
+       */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition getDefaultInstanceForType() {
-        return com.google.monitoring.v3.AlertPolicy.Condition.getDefaultInstance();
+      public boolean hasConditionAbsent() {
+        return conditionCase_ == 2;
       }
-
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       *
+       * @return The conditionAbsent.
+       */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition build() {
-        com.google.monitoring.v3.AlertPolicy.Condition result = buildPartial();
-        if (!result.isInitialized()) {
-          throw newUninitializedMessageException(result);
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence getConditionAbsent() {
+        if (conditionAbsentBuilder_ == null) {
+          if (conditionCase_ == 2) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+        } else {
+          if (conditionCase_ == 2) {
+            return conditionAbsentBuilder_.getMessage();
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
         }
-        return result;
       }
-
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition buildPartial() {
-        com.google.monitoring.v3.AlertPolicy.Condition result =
-            new com.google.monitoring.v3.AlertPolicy.Condition(this);
-        if (bitField0_ != 0) {
-          buildPartial0(result);
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
+      public Builder setConditionAbsent(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence value) {
+        if (conditionAbsentBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          condition_ = value;
+          onChanged();
+        } else {
+          conditionAbsentBuilder_.setMessage(value);
         }
-        buildPartialOneofs(result);
-        onBuilt();
-        return result;
+        conditionCase_ = 2;
+        return this;
       }
-
-      private void buildPartial0(com.google.monitoring.v3.AlertPolicy.Condition result) {
-        int from_bitField0_ = bitField0_;
-        if (((from_bitField0_ & 0x00000001) != 0)) {
-          result.name_ = name_;
-        }
-        if (((from_bitField0_ & 0x00000002) != 0)) {
-          result.displayName_ = displayName_;
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
+      public Builder setConditionAbsent(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder builderForValue) {
+        if (conditionAbsentBuilder_ == null) {
+          condition_ = builderForValue.build();
+          onChanged();
+        } else {
+          conditionAbsentBuilder_.setMessage(builderForValue.build());
         }
+        conditionCase_ = 2;
+        return this;
       }
-
-      private void buildPartialOneofs(com.google.monitoring.v3.AlertPolicy.Condition result) {
-        result.conditionCase_ = conditionCase_;
-        result.condition_ = this.condition_;
-        if (conditionCase_ == 1 && conditionThresholdBuilder_ != null) {
-          result.condition_ = conditionThresholdBuilder_.build();
-        }
-        if (conditionCase_ == 2 && conditionAbsentBuilder_ != null) {
-          result.condition_ = conditionAbsentBuilder_.build();
-        }
-        if (conditionCase_ == 20 && conditionMatchedLogBuilder_ != null) {
-          result.condition_ = conditionMatchedLogBuilder_.build();
-        }
-        if (conditionCase_ == 19 && conditionMonitoringQueryLanguageBuilder_ != null) {
-          result.condition_ = conditionMonitoringQueryLanguageBuilder_.build();
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
+      public Builder mergeConditionAbsent(
+          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence value) {
+        if (conditionAbsentBuilder_ == null) {
+          if (conditionCase_ == 2
+              && condition_
+                  != com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
+                      .getDefaultInstance()) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.newBuilder(
+                        (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_)
+                    .mergeFrom(value)
+                    .buildPartial();
+          } else {
+            condition_ = value;
+          }
+          onChanged();
+        } else {
+          if (conditionCase_ == 2) {
+            conditionAbsentBuilder_.mergeFrom(value);
+          } else {
+            conditionAbsentBuilder_.setMessage(value);
+          }
         }
+        conditionCase_ = 2;
+        return this;
       }
-
-      @java.lang.Override
-      public Builder clone() {
-        return super.clone();
-      }
-
-      @java.lang.Override
-      public Builder setField(
-          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-        return super.setField(field, value);
-      }
-
-      @java.lang.Override
-      public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-        return super.clearField(field);
-      }
-
-      @java.lang.Override
-      public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-        return super.clearOneof(oneof);
-      }
-
-      @java.lang.Override
-      public Builder setRepeatedField(
-          com.google.protobuf.Descriptors.FieldDescriptor field,
-          int index,
-          java.lang.Object value) {
-        return super.setRepeatedField(field, index, value);
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
+      public Builder clearConditionAbsent() {
+        if (conditionAbsentBuilder_ == null) {
+          if (conditionCase_ == 2) {
+            conditionCase_ = 0;
+            condition_ = null;
+            onChanged();
+          }
+        } else {
+          if (conditionCase_ == 2) {
+            conditionCase_ = 0;
+            condition_ = null;
+          }
+          conditionAbsentBuilder_.clear();
+        }
+        return this;
       }
-
-      @java.lang.Override
-      public Builder addRepeatedField(
-          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-        return super.addRepeatedField(field, value);
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder
+          getConditionAbsentBuilder() {
+        return getConditionAbsentFieldBuilder().getBuilder();
       }
-
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
       @java.lang.Override
-      public Builder mergeFrom(com.google.protobuf.Message other) {
-        if (other instanceof com.google.monitoring.v3.AlertPolicy.Condition) {
-          return mergeFrom((com.google.monitoring.v3.AlertPolicy.Condition) other);
+      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder
+          getConditionAbsentOrBuilder() {
+        if ((conditionCase_ == 2) && (conditionAbsentBuilder_ != null)) {
+          return conditionAbsentBuilder_.getMessageOrBuilder();
         } else {
-          super.mergeFrom(other);
-          return this;
+          if (conditionCase_ == 2) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
         }
       }
-
-      public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.Condition other) {
-        if (other == com.google.monitoring.v3.AlertPolicy.Condition.getDefaultInstance())
-          return this;
-        if (!other.getName().isEmpty()) {
-          name_ = other.name_;
-          bitField0_ |= 0x00000001;
-          onChanged();
-        }
-        if (!other.getDisplayName().isEmpty()) {
-          displayName_ = other.displayName_;
-          bitField0_ |= 0x00000002;
-          onChanged();
-        }
-        switch (other.getConditionCase()) {
-          case CONDITION_THRESHOLD:
-            {
-              mergeConditionThreshold(other.getConditionThreshold());
-              break;
-            }
-          case CONDITION_ABSENT:
-            {
-              mergeConditionAbsent(other.getConditionAbsent());
-              break;
-            }
-          case CONDITION_MATCHED_LOG:
-            {
-              mergeConditionMatchedLog(other.getConditionMatchedLog());
-              break;
-            }
-          case CONDITION_MONITORING_QUERY_LANGUAGE:
-            {
-              mergeConditionMonitoringQueryLanguage(other.getConditionMonitoringQueryLanguage());
-              break;
-            }
-          case CONDITION_NOT_SET:
-            {
-              break;
-            }
+      /**
+       *
+       *
+       * 
+       * A condition that checks that a time series continues to
+       * receive new data points.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder>
+          getConditionAbsentFieldBuilder() {
+        if (conditionAbsentBuilder_ == null) {
+          if (!(conditionCase_ == 2)) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+          }
+          conditionAbsentBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder>(
+                  (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_,
+                  getParentForChildren(),
+                  isClean());
+          condition_ = null;
         }
-        this.mergeUnknownFields(other.getUnknownFields());
+        conditionCase_ = 2;
         onChanged();
-        return this;
+        return conditionAbsentBuilder_;
       }
 
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch,
+              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder>
+          conditionMatchedLogBuilder_;
+      /**
+       *
+       *
+       * 
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
+       *
+       * @return Whether the conditionMatchedLog field is set.
+       */
       @java.lang.Override
-      public final boolean isInitialized() {
-        return true;
+      public boolean hasConditionMatchedLog() {
+        return conditionCase_ == 20;
       }
-
+      /**
+       *
+       *
+       * 
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

+       *
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
+       *
+       * @return The conditionMatchedLog.
+       */
       @java.lang.Override
-      public Builder mergeFrom(
-          com.google.protobuf.CodedInputStream input,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        if (extensionRegistry == null) {
-          throw new java.lang.NullPointerException();
-        }
-        try {
-          boolean done = false;
-          while (!done) {
-            int tag = input.readTag();
-            switch (tag) {
-              case 0:
-                done = true;
-                break;
-              case 10:
-                {
-                  input.readMessage(
-                      getConditionThresholdFieldBuilder().getBuilder(), extensionRegistry);
-                  conditionCase_ = 1;
-                  break;
-                } // case 10
-              case 18:
-                {
-                  input.readMessage(
-                      getConditionAbsentFieldBuilder().getBuilder(), extensionRegistry);
-                  conditionCase_ = 2;
-                  break;
-                } // case 18
-              case 50:
-                {
-                  displayName_ = input.readStringRequireUtf8();
-                  bitField0_ |= 0x00000002;
-                  break;
-                } // case 50
-              case 98:
-                {
-                  name_ = input.readStringRequireUtf8();
-                  bitField0_ |= 0x00000001;
-                  break;
-                } // case 98
-              case 154:
-                {
-                  input.readMessage(
-                      getConditionMonitoringQueryLanguageFieldBuilder().getBuilder(),
-                      extensionRegistry);
-                  conditionCase_ = 19;
-                  break;
-                } // case 154
-              case 162:
-                {
-                  input.readMessage(
-                      getConditionMatchedLogFieldBuilder().getBuilder(), extensionRegistry);
-                  conditionCase_ = 20;
-                  break;
-                } // case 162
-              default:
-                {
-                  if (!super.parseUnknownField(input, extensionRegistry, tag)) {
-                    done = true; // was an endgroup tag
-                  }
-                  break;
-                } // default:
-            } // switch (tag)
-          } // while (!done)
-        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-          throw e.unwrapIOException();
-        } finally {
-          onChanged();
-        } // finally
-        return this;
-      }
-
-      private int conditionCase_ = 0;
-      private java.lang.Object condition_;
-
-      public ConditionCase getConditionCase() {
-        return ConditionCase.forNumber(conditionCase_);
-      }
-
-      public Builder clearCondition() {
-        conditionCase_ = 0;
-        condition_ = null;
-        onChanged();
-        return this;
+      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getConditionMatchedLog() {
+        if (conditionMatchedLogBuilder_ == null) {
+          if (conditionCase_ == 20) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+        } else {
+          if (conditionCase_ == 20) {
+            return conditionMatchedLogBuilder_.getMessage();
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+        }
       }
-
-      private int bitField0_;
-
-      private java.lang.Object name_ = "";
       /**
        *
        *
        * 
-       * Required if the condition exists. The unique resource name for this
-       * condition. Its format is:
-       *
-       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
-       *
-       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
-       * condition is created as part of a new or updated alerting policy.
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

        *
-       * When calling the
-       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
-       * method, do not include the `name` field in the conditions of the
-       * requested alerting policy. Cloud Monitoring creates the
-       * condition identifiers and includes them in the new policy.
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
+       */
+      public Builder setConditionMatchedLog(
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch value) {
+        if (conditionMatchedLogBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          condition_ = value;
+          onChanged();
+        } else {
+          conditionMatchedLogBuilder_.setMessage(value);
+        }
+        conditionCase_ = 20;
+        return this;
+      }
+      /**
        *
-       * When calling the
-       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
-       * method to update a policy, including a condition `name` causes the
-       * existing condition to be updated. Conditions without names are added to
-       * the updated policy. Existing conditions are deleted if they are not
-       * updated.
        *
-       * Best practice is to preserve `[CONDITION_ID]` if you make only small
-       * changes, such as those to condition thresholds, durations, or trigger
-       * values.  Otherwise, treat the change as a new condition and let the
-       * existing condition be deleted.
+       * 
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
        * 

        *
-       * string name = 12;
-       *
-       * @return The name.
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
        */
-      public java.lang.String getName() {
-        java.lang.Object ref = name_;
-        if (!(ref instanceof java.lang.String)) {
-          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          name_ = s;
-          return s;
+      public Builder setConditionMatchedLog(
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder builderForValue) {
+        if (conditionMatchedLogBuilder_ == null) {
+          condition_ = builderForValue.build();
+          onChanged();
         } else {
-          return (java.lang.String) ref;
+          conditionMatchedLogBuilder_.setMessage(builderForValue.build());
         }
+        conditionCase_ = 20;
+        return this;
       }
       /**
        *
        *
        * 
-       * Required if the condition exists. The unique resource name for this
-       * condition. Its format is:
-       *
-       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
-       *
-       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
-       * condition is created as part of a new or updated alerting policy.
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

        *
-       * When calling the
-       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
-       * method, do not include the `name` field in the conditions of the
-       * requested alerting policy. Cloud Monitoring creates the
-       * condition identifiers and includes them in the new policy.
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
+       */
+      public Builder mergeConditionMatchedLog(
+          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch value) {
+        if (conditionMatchedLogBuilder_ == null) {
+          if (conditionCase_ == 20
+              && condition_
+                  != com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance()) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.newBuilder(
+                        (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_)
+                    .mergeFrom(value)
+                    .buildPartial();
+          } else {
+            condition_ = value;
+          }
+          onChanged();
+        } else {
+          if (conditionCase_ == 20) {
+            conditionMatchedLogBuilder_.mergeFrom(value);
+          } else {
+            conditionMatchedLogBuilder_.setMessage(value);
+          }
+        }
+        conditionCase_ = 20;
+        return this;
+      }
+      /**
        *
-       * When calling the
-       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
-       * method to update a policy, including a condition `name` causes the
-       * existing condition to be updated. Conditions without names are added to
-       * the updated policy. Existing conditions are deleted if they are not
-       * updated.
        *
-       * Best practice is to preserve `[CONDITION_ID]` if you make only small
-       * changes, such as those to condition thresholds, durations, or trigger
-       * values.  Otherwise, treat the change as a new condition and let the
-       * existing condition be deleted.
+       * 
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
        * 

        *
-       * string name = 12;
-       *
-       * @return The bytes for name.
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
        */
-      public com.google.protobuf.ByteString getNameBytes() {
-        java.lang.Object ref = name_;
-        if (ref instanceof String) {
-          com.google.protobuf.ByteString b =
-              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-          name_ = b;
-          return b;
+      public Builder clearConditionMatchedLog() {
+        if (conditionMatchedLogBuilder_ == null) {
+          if (conditionCase_ == 20) {
+            conditionCase_ = 0;
+            condition_ = null;
+            onChanged();
+          }
         } else {
-          return (com.google.protobuf.ByteString) ref;
+          if (conditionCase_ == 20) {
+            conditionCase_ = 0;
+            condition_ = null;
+          }
+          conditionMatchedLogBuilder_.clear();
         }
+        return this;
       }
       /**
        *
        *
        * 
-       * Required if the condition exists. The unique resource name for this
-       * condition. Its format is:
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

        *
-       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
+       */
+      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder
+          getConditionMatchedLogBuilder() {
+        return getConditionMatchedLogFieldBuilder().getBuilder();
+      }
+      /**
        *
-       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
-       * condition is created as part of a new or updated alerting policy.
        *
-       * When calling the
-       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
-       * method, do not include the `name` field in the conditions of the
-       * requested alerting policy. Cloud Monitoring creates the
-       * condition identifiers and includes them in the new policy.
+       * 
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

        *
-       * When calling the
-       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
-       * method to update a policy, including a condition `name` causes the
-       * existing condition to be updated. Conditions without names are added to
-       * the updated policy. Existing conditions are deleted if they are not
-       * updated.
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder
+          getConditionMatchedLogOrBuilder() {
+        if ((conditionCase_ == 20) && (conditionMatchedLogBuilder_ != null)) {
+          return conditionMatchedLogBuilder_.getMessageOrBuilder();
+        } else {
+          if (conditionCase_ == 20) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+        }
+      }
+      /**
        *
-       * Best practice is to preserve `[CONDITION_ID]` if you make only small
-       * changes, such as those to condition thresholds, durations, or trigger
-       * values.  Otherwise, treat the change as a new condition and let the
-       * existing condition be deleted.
-       * 

        *
-       * string name = 12;
+       * 
+       * A condition that checks for log messages matching given constraints. If
+       * set, no other conditions can be present.
+       * 

        *
-       * @param value The name to set.
-       * @return This builder for chaining.
+       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
+       * 
        */
-      public Builder setName(java.lang.String value) {
-        if (value == null) {
-          throw new NullPointerException();
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch,
+              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder>
+          getConditionMatchedLogFieldBuilder() {
+        if (conditionMatchedLogBuilder_ == null) {
+          if (!(conditionCase_ == 20)) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
+          }
+          conditionMatchedLogBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch,
+                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder,
+                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder>(
+                  (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_,
+                  getParentForChildren(),
+                  isClean());
+          condition_ = null;
         }
-        name_ = value;
-        bitField0_ |= 0x00000001;
+        conditionCase_ = 20;
         onChanged();
-        return this;
+        return conditionMatchedLogBuilder_;
       }
+
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition,
+              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                  .Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition
+                  .MonitoringQueryLanguageConditionOrBuilder>
+          conditionMonitoringQueryLanguageBuilder_;
       /**
        *
        *
        * 
-       * Required if the condition exists. The unique resource name for this
-       * condition. Its format is:
-       *
-       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
-       *
-       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
-       * condition is created as part of a new or updated alerting policy.
-       *
-       * When calling the
-       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
-       * method, do not include the `name` field in the conditions of the
-       * requested alerting policy. Cloud Monitoring creates the
-       * condition identifiers and includes them in the new policy.
-       *
-       * When calling the
-       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
-       * method to update a policy, including a condition `name` causes the
-       * existing condition to be updated. Conditions without names are added to
-       * the updated policy. Existing conditions are deleted if they are not
-       * updated.
-       *
-       * Best practice is to preserve `[CONDITION_ID]` if you make only small
-       * changes, such as those to condition thresholds, durations, or trigger
-       * values.  Otherwise, treat the change as a new condition and let the
-       * existing condition be deleted.
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string name = 12;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        *
-       * @return This builder for chaining.
+       * @return Whether the conditionMonitoringQueryLanguage field is set.
        */
-      public Builder clearName() {
-        name_ = getDefaultInstance().getName();
-        bitField0_ = (bitField0_ & ~0x00000001);
-        onChanged();
-        return this;
+      @java.lang.Override
+      public boolean hasConditionMonitoringQueryLanguage() {
+        return conditionCase_ == 19;
       }
       /**
        *
        *
        * 
-       * Required if the condition exists. The unique resource name for this
-       * condition. Its format is:
-       *
-       *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]/conditions/[CONDITION_ID]
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
+       * 

        *
-       * `[CONDITION_ID]` is assigned by Cloud Monitoring when the
-       * condition is created as part of a new or updated alerting policy.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        *
-       * When calling the
-       * [alertPolicies.create][google.monitoring.v3.AlertPolicyService.CreateAlertPolicy]
-       * method, do not include the `name` field in the conditions of the
-       * requested alerting policy. Cloud Monitoring creates the
-       * condition identifiers and includes them in the new policy.
+       * @return The conditionMonitoringQueryLanguage.
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          getConditionMonitoringQueryLanguage() {
+        if (conditionMonitoringQueryLanguageBuilder_ == null) {
+          if (conditionCase_ == 19) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+              .getDefaultInstance();
+        } else {
+          if (conditionCase_ == 19) {
+            return conditionMonitoringQueryLanguageBuilder_.getMessage();
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+              .getDefaultInstance();
+        }
+      }
+      /**
        *
-       * When calling the
-       * [alertPolicies.update][google.monitoring.v3.AlertPolicyService.UpdateAlertPolicy]
-       * method to update a policy, including a condition `name` causes the
-       * existing condition to be updated. Conditions without names are added to
-       * the updated policy. Existing conditions are deleted if they are not
-       * updated.
        *
-       * Best practice is to preserve `[CONDITION_ID]` if you make only small
-       * changes, such as those to condition thresholds, durations, or trigger
-       * values.  Otherwise, treat the change as a new condition and let the
-       * existing condition be deleted.
+       * 
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string name = 12;
-       *
-       * @param value The bytes for name to set.
-       * @return This builder for chaining.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        */
-      public Builder setNameBytes(com.google.protobuf.ByteString value) {
-        if (value == null) {
-          throw new NullPointerException();
+      public Builder setConditionMonitoringQueryLanguage(
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition value) {
+        if (conditionMonitoringQueryLanguageBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          condition_ = value;
+          onChanged();
+        } else {
+          conditionMonitoringQueryLanguageBuilder_.setMessage(value);
         }
-        checkByteStringIsUtf8(value);
-        name_ = value;
-        bitField0_ |= 0x00000001;
-        onChanged();
+        conditionCase_ = 19;
         return this;
       }
-
-      private java.lang.Object displayName_ = "";
       /**
        *
        *
        * 
-       * A short name or phrase used to identify the condition in dashboards,
-       * notifications, and incidents. To avoid confusion, don't use the same
-       * display name for multiple conditions in the same policy.
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string display_name = 6;
-       *
-       * @return The displayName.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        */
-      public java.lang.String getDisplayName() {
-        java.lang.Object ref = displayName_;
-        if (!(ref instanceof java.lang.String)) {
-          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
-          java.lang.String s = bs.toStringUtf8();
-          displayName_ = s;
-          return s;
+      public Builder setConditionMonitoringQueryLanguage(
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition.Builder
+              builderForValue) {
+        if (conditionMonitoringQueryLanguageBuilder_ == null) {
+          condition_ = builderForValue.build();
+          onChanged();
         } else {
-          return (java.lang.String) ref;
+          conditionMonitoringQueryLanguageBuilder_.setMessage(builderForValue.build());
         }
+        conditionCase_ = 19;
+        return this;
       }
       /**
        *
        *
        * 
-       * A short name or phrase used to identify the condition in dashboards,
-       * notifications, and incidents. To avoid confusion, don't use the same
-       * display name for multiple conditions in the same policy.
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string display_name = 6;
-       *
-       * @return The bytes for displayName.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        */
-      public com.google.protobuf.ByteString getDisplayNameBytes() {
-        java.lang.Object ref = displayName_;
-        if (ref instanceof String) {
-          com.google.protobuf.ByteString b =
-              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
-          displayName_ = b;
-          return b;
+      public Builder mergeConditionMonitoringQueryLanguage(
+          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition value) {
+        if (conditionMonitoringQueryLanguageBuilder_ == null) {
+          if (conditionCase_ == 19
+              && condition_
+                  != com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                      .getDefaultInstance()) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                    .newBuilder(
+                        (com.google.monitoring.v3.AlertPolicy.Condition
+                                .MonitoringQueryLanguageCondition)
+                            condition_)
+                    .mergeFrom(value)
+                    .buildPartial();
+          } else {
+            condition_ = value;
+          }
+          onChanged();
         } else {
-          return (com.google.protobuf.ByteString) ref;
+          if (conditionCase_ == 19) {
+            conditionMonitoringQueryLanguageBuilder_.mergeFrom(value);
+          } else {
+            conditionMonitoringQueryLanguageBuilder_.setMessage(value);
+          }
         }
+        conditionCase_ = 19;
+        return this;
       }
       /**
        *
        *
        * 
-       * A short name or phrase used to identify the condition in dashboards,
-       * notifications, and incidents. To avoid confusion, don't use the same
-       * display name for multiple conditions in the same policy.
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string display_name = 6;
-       *
-       * @param value The displayName to set.
-       * @return This builder for chaining.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        */
-      public Builder setDisplayName(java.lang.String value) {
-        if (value == null) {
-          throw new NullPointerException();
+      public Builder clearConditionMonitoringQueryLanguage() {
+        if (conditionMonitoringQueryLanguageBuilder_ == null) {
+          if (conditionCase_ == 19) {
+            conditionCase_ = 0;
+            condition_ = null;
+            onChanged();
+          }
+        } else {
+          if (conditionCase_ == 19) {
+            conditionCase_ = 0;
+            condition_ = null;
+          }
+          conditionMonitoringQueryLanguageBuilder_.clear();
         }
-        displayName_ = value;
-        bitField0_ |= 0x00000002;
-        onChanged();
         return this;
       }
       /**
        *
        *
        * 
-       * A short name or phrase used to identify the condition in dashboards,
-       * notifications, and incidents. To avoid confusion, don't use the same
-       * display name for multiple conditions in the same policy.
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string display_name = 6;
-       *
-       * @return This builder for chaining.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        */
-      public Builder clearDisplayName() {
-        displayName_ = getDefaultInstance().getDisplayName();
-        bitField0_ = (bitField0_ & ~0x00000002);
-        onChanged();
-        return this;
+      public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition.Builder
+          getConditionMonitoringQueryLanguageBuilder() {
+        return getConditionMonitoringQueryLanguageFieldBuilder().getBuilder();
+      }
+      /**
+       *
+       *
+       * 
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
+       */
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.Condition
+              .MonitoringQueryLanguageConditionOrBuilder
+          getConditionMonitoringQueryLanguageOrBuilder() {
+        if ((conditionCase_ == 19) && (conditionMonitoringQueryLanguageBuilder_ != null)) {
+          return conditionMonitoringQueryLanguageBuilder_.getMessageOrBuilder();
+        } else {
+          if (conditionCase_ == 19) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                condition_;
+          }
+          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+              .getDefaultInstance();
+        }
       }
       /**
        *
        *
        * 
-       * A short name or phrase used to identify the condition in dashboards,
-       * notifications, and incidents. To avoid confusion, don't use the same
-       * display name for multiple conditions in the same policy.
+       * A condition that uses the Monitoring Query Language to define
+       * alerts.
        * 

        *
-       * string display_name = 6;
-       *
-       * @param value The bytes for displayName to set.
-       * @return This builder for chaining.
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+       * 
        */
-      public Builder setDisplayNameBytes(com.google.protobuf.ByteString value) {
-        if (value == null) {
-          throw new NullPointerException();
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition,
+              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                  .Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition
+                  .MonitoringQueryLanguageConditionOrBuilder>
+          getConditionMonitoringQueryLanguageFieldBuilder() {
+        if (conditionMonitoringQueryLanguageBuilder_ == null) {
+          if (!(conditionCase_ == 19)) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                    .getDefaultInstance();
+          }
+          conditionMonitoringQueryLanguageBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition,
+                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+                      .Builder,
+                  com.google.monitoring.v3.AlertPolicy.Condition
+                      .MonitoringQueryLanguageConditionOrBuilder>(
+                  (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
+                      condition_,
+                  getParentForChildren(),
+                  isClean());
+          condition_ = null;
         }
-        checkByteStringIsUtf8(value);
-        displayName_ = value;
-        bitField0_ |= 0x00000002;
+        conditionCase_ = 19;
         onChanged();
-        return this;
+        return conditionMonitoringQueryLanguageBuilder_;
       }
 
       private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder>
-          conditionThresholdBuilder_;
+              com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition,
+              com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+                  .Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition
+                  .PrometheusQueryLanguageConditionOrBuilder>
+          conditionPrometheusQueryLanguageBuilder_;
       /**
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        *
-       * @return Whether the conditionThreshold field is set.
+       * @return Whether the conditionPrometheusQueryLanguage field is set.
        */
       @java.lang.Override
-      public boolean hasConditionThreshold() {
-        return conditionCase_ == 1;
+      public boolean hasConditionPrometheusQueryLanguage() {
+        return conditionCase_ == 21;
       }
       /**
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        *
-       * @return The conditionThreshold.
+       * @return The conditionPrometheusQueryLanguage.
        */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-          getConditionThreshold() {
-        if (conditionThresholdBuilder_ == null) {
-          if (conditionCase_ == 1) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
+      public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+          getConditionPrometheusQueryLanguage() {
+        if (conditionPrometheusQueryLanguageBuilder_ == null) {
+          if (conditionCase_ == 21) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+                condition_;
           }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          return com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
               .getDefaultInstance();
         } else {
-          if (conditionCase_ == 1) {
-            return conditionThresholdBuilder_.getMessage();
+          if (conditionCase_ == 21) {
+            return conditionPrometheusQueryLanguageBuilder_.getMessage();
           }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+          return com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
               .getDefaultInstance();
         }
       }
@@ -13189,67 +18606,74 @@ public boolean hasConditionThreshold() {
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        */
-      public Builder setConditionThreshold(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold value) {
-        if (conditionThresholdBuilder_ == null) {
+      public Builder setConditionPrometheusQueryLanguage(
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition value) {
+        if (conditionPrometheusQueryLanguageBuilder_ == null) {
           if (value == null) {
             throw new NullPointerException();
           }
           condition_ = value;
           onChanged();
         } else {
-          conditionThresholdBuilder_.setMessage(value);
+          conditionPrometheusQueryLanguageBuilder_.setMessage(value);
         }
-        conditionCase_ = 1;
+        conditionCase_ = 21;
         return this;
       }
       /**
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        */
-      public Builder setConditionThreshold(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder builderForValue) {
-        if (conditionThresholdBuilder_ == null) {
+      public Builder setConditionPrometheusQueryLanguage(
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition.Builder
+              builderForValue) {
+        if (conditionPrometheusQueryLanguageBuilder_ == null) {
           condition_ = builderForValue.build();
           onChanged();
         } else {
-          conditionThresholdBuilder_.setMessage(builderForValue.build());
+          conditionPrometheusQueryLanguageBuilder_.setMessage(builderForValue.build());
         }
-        conditionCase_ = 1;
+        conditionCase_ = 21;
         return this;
       }
       /**
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        */
-      public Builder mergeConditionThreshold(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold value) {
-        if (conditionThresholdBuilder_ == null) {
-          if (conditionCase_ == 1
+      public Builder mergeConditionPrometheusQueryLanguage(
+          com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition value) {
+        if (conditionPrometheusQueryLanguageBuilder_ == null) {
+          if (conditionCase_ == 21
               && condition_
-                  != com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
+                  != com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
                       .getDefaultInstance()) {
             condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.newBuilder(
-                        (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_)
+                com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+                    .newBuilder(
+                        (com.google.monitoring.v3.AlertPolicy.Condition
+                                .PrometheusQueryLanguageCondition)
+                            condition_)
                     .mergeFrom(value)
                     .buildPartial();
           } else {
@@ -13257,38 +18681,39 @@ public Builder mergeConditionThreshold(
           }
           onChanged();
         } else {
-          if (conditionCase_ == 1) {
-            conditionThresholdBuilder_.mergeFrom(value);
+          if (conditionCase_ == 21) {
+            conditionPrometheusQueryLanguageBuilder_.mergeFrom(value);
           } else {
-            conditionThresholdBuilder_.setMessage(value);
+            conditionPrometheusQueryLanguageBuilder_.setMessage(value);
           }
         }
-        conditionCase_ = 1;
+        conditionCase_ = 21;
         return this;
       }
       /**
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        */
-      public Builder clearConditionThreshold() {
-        if (conditionThresholdBuilder_ == null) {
-          if (conditionCase_ == 1) {
+      public Builder clearConditionPrometheusQueryLanguage() {
+        if (conditionPrometheusQueryLanguageBuilder_ == null) {
+          if (conditionCase_ == 21) {
             conditionCase_ = 0;
             condition_ = null;
             onChanged();
           }
         } else {
-          if (conditionCase_ == 1) {
+          if (conditionCase_ == 21) {
             conditionCase_ = 0;
             condition_ = null;
           }
-          conditionThresholdBuilder_.clear();
+          conditionPrometheusQueryLanguageBuilder_.clear();
         }
         return this;
       }
@@ -13296,1130 +18721,1413 @@ public Builder clearConditionThreshold() {
        *
        *
        * 
-       * A condition that compares a time series against a threshold.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
-       * 
-       */
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder
-          getConditionThresholdBuilder() {
-        return getConditionThresholdFieldBuilder().getBuilder();
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that compares a time series against a threshold.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
-       * 
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder
-          getConditionThresholdOrBuilder() {
-        if ((conditionCase_ == 1) && (conditionThresholdBuilder_ != null)) {
-          return conditionThresholdBuilder_.getMessageOrBuilder();
-        } else {
-          if (conditionCase_ == 1) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_;
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold
-              .getDefaultInstance();
-        }
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that compares a time series against a threshold.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricThreshold condition_threshold = 1;
-       * 
-       */
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder>
-          getConditionThresholdFieldBuilder() {
-        if (conditionThresholdBuilder_ == null) {
-          if (!(conditionCase_ == 1)) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.getDefaultInstance();
-          }
-          conditionThresholdBuilder_ =
-              new com.google.protobuf.SingleFieldBuilderV3<
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold.Builder,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricThresholdOrBuilder>(
-                  (com.google.monitoring.v3.AlertPolicy.Condition.MetricThreshold) condition_,
-                  getParentForChildren(),
-                  isClean());
-          condition_ = null;
-        }
-        conditionCase_ = 1;
-        onChanged();
-        return conditionThresholdBuilder_;
-      }
-
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder>
-          conditionAbsentBuilder_;
-      /**
-       *
-       *
-       * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
-       *
-       * @return Whether the conditionAbsent field is set.
        */
-      @java.lang.Override
-      public boolean hasConditionAbsent() {
-        return conditionCase_ == 2;
+      public com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition.Builder
+          getConditionPrometheusQueryLanguageBuilder() {
+        return getConditionPrometheusQueryLanguageFieldBuilder().getBuilder();
       }
       /**
        *
        *
        * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
-       *
-       * @return The conditionAbsent.
        */
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence getConditionAbsent() {
-        if (conditionAbsentBuilder_ == null) {
-          if (conditionCase_ == 2) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
+      public com.google.monitoring.v3.AlertPolicy.Condition
+              .PrometheusQueryLanguageConditionOrBuilder
+          getConditionPrometheusQueryLanguageOrBuilder() {
+        if ((conditionCase_ == 21) && (conditionPrometheusQueryLanguageBuilder_ != null)) {
+          return conditionPrometheusQueryLanguageBuilder_.getMessageOrBuilder();
         } else {
-          if (conditionCase_ == 2) {
-            return conditionAbsentBuilder_.getMessage();
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
-        }
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-       * 
-       */
-      public Builder setConditionAbsent(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence value) {
-        if (conditionAbsentBuilder_ == null) {
-          if (value == null) {
-            throw new NullPointerException();
+          if (conditionCase_ == 21) {
+            return (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+                condition_;
           }
-          condition_ = value;
-          onChanged();
-        } else {
-          conditionAbsentBuilder_.setMessage(value);
+          return com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+              .getDefaultInstance();
         }
-        conditionCase_ = 2;
-        return this;
       }
       /**
        *
        *
        * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
+       * A condition that uses the Prometheus query language to define alerts.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
+       * 
+       * .google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
        * 
        */
-      public Builder setConditionAbsent(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder builderForValue) {
-        if (conditionAbsentBuilder_ == null) {
-          condition_ = builderForValue.build();
-          onChanged();
-        } else {
-          conditionAbsentBuilder_.setMessage(builderForValue.build());
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition,
+              com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+                  .Builder,
+              com.google.monitoring.v3.AlertPolicy.Condition
+                  .PrometheusQueryLanguageConditionOrBuilder>
+          getConditionPrometheusQueryLanguageFieldBuilder() {
+        if (conditionPrometheusQueryLanguageBuilder_ == null) {
+          if (!(conditionCase_ == 21)) {
+            condition_ =
+                com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+                    .getDefaultInstance();
+          }
+          conditionPrometheusQueryLanguageBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition,
+                  com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition
+                      .Builder,
+                  com.google.monitoring.v3.AlertPolicy.Condition
+                      .PrometheusQueryLanguageConditionOrBuilder>(
+                  (com.google.monitoring.v3.AlertPolicy.Condition.PrometheusQueryLanguageCondition)
+                      condition_,
+                  getParentForChildren(),
+                  isClean());
+          condition_ = null;
         }
-        conditionCase_ = 2;
-        return this;
+        conditionCase_ = 21;
+        onChanged();
+        return conditionPrometheusQueryLanguageBuilder_;
+      }
+
+      @java.lang.Override
+      public final Builder setUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.setUnknownFields(unknownFields);
+      }
+
+      @java.lang.Override
+      public final Builder mergeUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.mergeUnknownFields(unknownFields);
       }
+
+      // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition)
+    }
+
+    // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition)
+    private static final com.google.monitoring.v3.AlertPolicy.Condition DEFAULT_INSTANCE;
+
+    static {
+      DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition();
+    }
+
+    public static com.google.monitoring.v3.AlertPolicy.Condition getDefaultInstance() {
+      return DEFAULT_INSTANCE;
+    }
+
+    private static final com.google.protobuf.Parser PARSER =
+        new com.google.protobuf.AbstractParser() {
+          @java.lang.Override
+          public Condition parsePartialFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+            Builder builder = newBuilder();
+            try {
+              builder.mergeFrom(input, extensionRegistry);
+            } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+              throw e.setUnfinishedMessage(builder.buildPartial());
+            } catch (com.google.protobuf.UninitializedMessageException e) {
+              throw e.asInvalidProtocolBufferException()
+                  .setUnfinishedMessage(builder.buildPartial());
+            } catch (java.io.IOException e) {
+              throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                  .setUnfinishedMessage(builder.buildPartial());
+            }
+            return builder.buildPartial();
+          }
+        };
+
+    public static com.google.protobuf.Parser parser() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Parser getParserForType() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.Condition getDefaultInstanceForType() {
+      return DEFAULT_INSTANCE;
+    }
+  }
+
+  public interface AlertStrategyOrBuilder
+      extends
+      // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.AlertStrategy)
+      com.google.protobuf.MessageOrBuilder {
+
+    /**
+     *
+     *
+     * 
+     * Required for alert policies with a `LogMatch` condition.
+     *
+     * This limit is not implemented for alert policies that are not log-based.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+     * 
+     *
+     * @return Whether the notificationRateLimit field is set.
+     */
+    boolean hasNotificationRateLimit();
+    /**
+     *
+     *
+     * 
+     * Required for alert policies with a `LogMatch` condition.
+     *
+     * This limit is not implemented for alert policies that are not log-based.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+     * 
+     *
+     * @return The notificationRateLimit.
+     */
+    com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+        getNotificationRateLimit();
+    /**
+     *
+     *
+     * 
+     * Required for alert policies with a `LogMatch` condition.
+     *
+     * This limit is not implemented for alert policies that are not log-based.
+     * 

+     *
+     * 
+     * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+     * 
+     */
+    com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder
+        getNotificationRateLimitOrBuilder();
+
+    /**
+     *
+     *
+     * 
+     * If an alert policy that was active has no data for this long, any open
+     * incidents will close
+     * 

+     *
+     * .google.protobuf.Duration auto_close = 3;
+     *
+     * @return Whether the autoClose field is set.
+     */
+    boolean hasAutoClose();
+    /**
+     *
+     *
+     * 
+     * If an alert policy that was active has no data for this long, any open
+     * incidents will close
+     * 

+     *
+     * .google.protobuf.Duration auto_close = 3;
+     *
+     * @return The autoClose.
+     */
+    com.google.protobuf.Duration getAutoClose();
+    /**
+     *
+     *
+     * 
+     * If an alert policy that was active has no data for this long, any open
+     * incidents will close
+     * 

+     *
+     * .google.protobuf.Duration auto_close = 3;
+     */
+    com.google.protobuf.DurationOrBuilder getAutoCloseOrBuilder();
+
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    java.util.List
+        getNotificationChannelStrategyList();
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+        getNotificationChannelStrategy(int index);
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    int getNotificationChannelStrategyCount();
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    java.util.List<
+            ? extends
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                    .NotificationChannelStrategyOrBuilder>
+        getNotificationChannelStrategyOrBuilderList();
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategyOrBuilder
+        getNotificationChannelStrategyOrBuilder(int index);
+  }
+  /**
+   *
+   *
+   * 
+   * Control over how the notification channels in `notification_channels`
+   * are notified when this alert fires.
+   * 

+   *
+   * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy}
+   */
+  public static final class AlertStrategy extends com.google.protobuf.GeneratedMessageV3
+      implements
+      // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.AlertStrategy)
+      AlertStrategyOrBuilder {
+    private static final long serialVersionUID = 0L;
+    // Use AlertStrategy.newBuilder() to construct.
+    private AlertStrategy(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+      super(builder);
+    }
+
+    private AlertStrategy() {
+      notificationChannelStrategy_ = java.util.Collections.emptyList();
+    }
+
+    @java.lang.Override
+    @SuppressWarnings({"unused"})
+    protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+      return new AlertStrategy();
+    }
+
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.monitoring.v3.AlertProto
+          .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.monitoring.v3.AlertProto
+          .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.class,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.Builder.class);
+    }
+
+    public interface NotificationRateLimitOrBuilder
+        extends
+        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+        com.google.protobuf.MessageOrBuilder {
+
       /**
        *
        *
        * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
+       * Not more than one notification per `period`.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-       * 
-       */
-      public Builder mergeConditionAbsent(
-          com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence value) {
-        if (conditionAbsentBuilder_ == null) {
-          if (conditionCase_ == 2
-              && condition_
-                  != com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence
-                      .getDefaultInstance()) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.newBuilder(
-                        (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_)
-                    .mergeFrom(value)
-                    .buildPartial();
-          } else {
-            condition_ = value;
-          }
-          onChanged();
-        } else {
-          if (conditionCase_ == 2) {
-            conditionAbsentBuilder_.mergeFrom(value);
-          } else {
-            conditionAbsentBuilder_.setMessage(value);
-          }
-        }
-        conditionCase_ = 2;
-        return this;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
-       * 

+       * .google.protobuf.Duration period = 1;
        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-       * 
+       * @return Whether the period field is set.
        */
-      public Builder clearConditionAbsent() {
-        if (conditionAbsentBuilder_ == null) {
-          if (conditionCase_ == 2) {
-            conditionCase_ = 0;
-            condition_ = null;
-            onChanged();
-          }
-        } else {
-          if (conditionCase_ == 2) {
-            conditionCase_ = 0;
-            condition_ = null;
-          }
-          conditionAbsentBuilder_.clear();
-        }
-        return this;
-      }
+      boolean hasPeriod();
       /**
        *
        *
        * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
+       * Not more than one notification per `period`.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-       * 
-       */
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder
-          getConditionAbsentBuilder() {
-        return getConditionAbsentFieldBuilder().getBuilder();
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
-       * 

+       * .google.protobuf.Duration period = 1;
        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-       * 
+       * @return The period.
        */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder
-          getConditionAbsentOrBuilder() {
-        if ((conditionCase_ == 2) && (conditionAbsentBuilder_ != null)) {
-          return conditionAbsentBuilder_.getMessageOrBuilder();
-        } else {
-          if (conditionCase_ == 2) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_;
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
-        }
-      }
+      com.google.protobuf.Duration getPeriod();
       /**
        *
        *
        * 
-       * A condition that checks that a time series continues to
-       * receive new data points.
+       * Not more than one notification per `period`.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.MetricAbsence condition_absent = 2;
-       * 
+       * .google.protobuf.Duration period = 1;
        */
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder>
-          getConditionAbsentFieldBuilder() {
-        if (conditionAbsentBuilder_ == null) {
-          if (!(conditionCase_ == 2)) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.getDefaultInstance();
-          }
-          conditionAbsentBuilder_ =
-              new com.google.protobuf.SingleFieldBuilderV3<
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence.Builder,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsenceOrBuilder>(
-                  (com.google.monitoring.v3.AlertPolicy.Condition.MetricAbsence) condition_,
-                  getParentForChildren(),
-                  isClean());
-          condition_ = null;
-        }
-        conditionCase_ = 2;
-        onChanged();
-        return conditionAbsentBuilder_;
+      com.google.protobuf.DurationOrBuilder getPeriodOrBuilder();
+    }
+    /**
+     *
+     *
+     * 
+     * Control over the rate of notifications sent to this alert policy's
+     * notification channels.
+     * 

+     *
+     * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit}
+     */
+    public static final class NotificationRateLimit extends com.google.protobuf.GeneratedMessageV3
+        implements
+        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+        NotificationRateLimitOrBuilder {
+      private static final long serialVersionUID = 0L;
+      // Use NotificationRateLimit.newBuilder() to construct.
+      private NotificationRateLimit(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+        super(builder);
       }
 
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch,
-              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder>
-          conditionMatchedLogBuilder_;
-      /**
-       *
-       *
-       * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
-       *
-       * @return Whether the conditionMatchedLog field is set.
-       */
+      private NotificationRateLimit() {}
+
       @java.lang.Override
-      public boolean hasConditionMatchedLog() {
-        return conditionCase_ == 20;
+      @SuppressWarnings({"unused"})
+      protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
+        return new NotificationRateLimit();
       }
-      /**
-       *
-       *
-       * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
-       *
-       * @return The conditionMatchedLog.
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch getConditionMatchedLog() {
-        if (conditionMatchedLogBuilder_ == null) {
-          if (conditionCase_ == 20) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
-        } else {
-          if (conditionCase_ == 20) {
-            return conditionMatchedLogBuilder_.getMessage();
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
-        }
+
+      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor;
       }
-      /**
-       *
-       *
-       * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
-       */
-      public Builder setConditionMatchedLog(
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch value) {
-        if (conditionMatchedLogBuilder_ == null) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          condition_ = value;
-          onChanged();
-        } else {
-          conditionMatchedLogBuilder_.setMessage(value);
-        }
-        conditionCase_ = 20;
-        return this;
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.class,
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
+                    .class);
       }
+
+      public static final int PERIOD_FIELD_NUMBER = 1;
+      private com.google.protobuf.Duration period_;
       /**
        *
        *
        * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
+       * Not more than one notification per `period`.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
+       * .google.protobuf.Duration period = 1;
+       *
+       * @return Whether the period field is set.
        */
-      public Builder setConditionMatchedLog(
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder builderForValue) {
-        if (conditionMatchedLogBuilder_ == null) {
-          condition_ = builderForValue.build();
-          onChanged();
-        } else {
-          conditionMatchedLogBuilder_.setMessage(builderForValue.build());
-        }
-        conditionCase_ = 20;
-        return this;
+      @java.lang.Override
+      public boolean hasPeriod() {
+        return period_ != null;
       }
       /**
        *
        *
        * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
+       * Not more than one notification per `period`.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
+       * .google.protobuf.Duration period = 1;
+       *
+       * @return The period.
        */
-      public Builder mergeConditionMatchedLog(
-          com.google.monitoring.v3.AlertPolicy.Condition.LogMatch value) {
-        if (conditionMatchedLogBuilder_ == null) {
-          if (conditionCase_ == 20
-              && condition_
-                  != com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance()) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.newBuilder(
-                        (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_)
-                    .mergeFrom(value)
-                    .buildPartial();
-          } else {
-            condition_ = value;
-          }
-          onChanged();
-        } else {
-          if (conditionCase_ == 20) {
-            conditionMatchedLogBuilder_.mergeFrom(value);
-          } else {
-            conditionMatchedLogBuilder_.setMessage(value);
-          }
-        }
-        conditionCase_ = 20;
-        return this;
+      @java.lang.Override
+      public com.google.protobuf.Duration getPeriod() {
+        return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
       }
       /**
        *
        *
        * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
+       * Not more than one notification per `period`.
        * 

        *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
+       * .google.protobuf.Duration period = 1;
        */
-      public Builder clearConditionMatchedLog() {
-        if (conditionMatchedLogBuilder_ == null) {
-          if (conditionCase_ == 20) {
-            conditionCase_ = 0;
-            condition_ = null;
-            onChanged();
-          }
-        } else {
-          if (conditionCase_ == 20) {
-            conditionCase_ = 0;
-            condition_ = null;
-          }
-          conditionMatchedLogBuilder_.clear();
+      @java.lang.Override
+      public com.google.protobuf.DurationOrBuilder getPeriodOrBuilder() {
+        return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
+      }
+
+      private byte memoizedIsInitialized = -1;
+
+      @java.lang.Override
+      public final boolean isInitialized() {
+        byte isInitialized = memoizedIsInitialized;
+        if (isInitialized == 1) return true;
+        if (isInitialized == 0) return false;
+
+        memoizedIsInitialized = 1;
+        return true;
+      }
+
+      @java.lang.Override
+      public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+        if (period_ != null) {
+          output.writeMessage(1, getPeriod());
         }
-        return this;
+        getUnknownFields().writeTo(output);
       }
-      /**
-       *
-       *
-       * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
-       */
-      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder
-          getConditionMatchedLogBuilder() {
-        return getConditionMatchedLogFieldBuilder().getBuilder();
+
+      @java.lang.Override
+      public int getSerializedSize() {
+        int size = memoizedSize;
+        if (size != -1) return size;
+
+        size = 0;
+        if (period_ != null) {
+          size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getPeriod());
+        }
+        size += getUnknownFields().getSerializedSize();
+        memoizedSize = size;
+        return size;
       }
-      /**
-       *
-       *
-       * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
-       */
+
+      @java.lang.Override
+      public boolean equals(final java.lang.Object obj) {
+        if (obj == this) {
+          return true;
+        }
+        if (!(obj
+            instanceof com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)) {
+          return super.equals(obj);
+        }
+        com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit other =
+            (com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit) obj;
+
+        if (hasPeriod() != other.hasPeriod()) return false;
+        if (hasPeriod()) {
+          if (!getPeriod().equals(other.getPeriod())) return false;
+        }
+        if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        return true;
+      }
+
+      @java.lang.Override
+      public int hashCode() {
+        if (memoizedHashCode != 0) {
+          return memoizedHashCode;
+        }
+        int hash = 41;
+        hash = (19 * hash) + getDescriptor().hashCode();
+        if (hasPeriod()) {
+          hash = (37 * hash) + PERIOD_FIELD_NUMBER;
+          hash = (53 * hash) + getPeriod().hashCode();
+        }
+        hash = (29 * hash) + getUnknownFields().hashCode();
+        memoizedHashCode = hash;
+        return hash;
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(java.nio.ByteBuffer data)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(
+              java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(com.google.protobuf.ByteString data)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(
+              com.google.protobuf.ByteString data,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws com.google.protobuf.InvalidProtocolBufferException {
+        return PARSER.parseFrom(data, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(
+              java.io.InputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseDelimitedFrom(
+              java.io.InputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
+      }
+
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          parseFrom(
+              com.google.protobuf.CodedInputStream input,
+              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+              throws java.io.IOException {
+        return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
+            PARSER, input, extensionRegistry);
+      }
+
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder
-          getConditionMatchedLogOrBuilder() {
-        if ((conditionCase_ == 20) && (conditionMatchedLogBuilder_ != null)) {
-          return conditionMatchedLogBuilder_.getMessageOrBuilder();
-        } else {
-          if (conditionCase_ == 20) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_;
-          }
-          return com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
-        }
+      public Builder newBuilderForType() {
+        return newBuilder();
       }
-      /**
-       *
-       *
-       * 
-       * A condition that checks for log messages matching given constraints. If
-       * set, no other conditions can be present.
-       * 

-       *
-       * .google.monitoring.v3.AlertPolicy.Condition.LogMatch condition_matched_log = 20;
-       * 
-       */
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch,
-              com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder>
-          getConditionMatchedLogFieldBuilder() {
-        if (conditionMatchedLogBuilder_ == null) {
-          if (!(conditionCase_ == 20)) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.getDefaultInstance();
-          }
-          conditionMatchedLogBuilder_ =
-              new com.google.protobuf.SingleFieldBuilderV3<
-                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch,
-                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatch.Builder,
-                  com.google.monitoring.v3.AlertPolicy.Condition.LogMatchOrBuilder>(
-                  (com.google.monitoring.v3.AlertPolicy.Condition.LogMatch) condition_,
-                  getParentForChildren(),
-                  isClean());
-          condition_ = null;
-        }
-        conditionCase_ = 20;
-        onChanged();
-        return conditionMatchedLogBuilder_;
+
+      public static Builder newBuilder() {
+        return DEFAULT_INSTANCE.toBuilder();
+      }
+
+      public static Builder newBuilder(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit prototype) {
+        return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
       }
 
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition,
-              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-                  .Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition
-                  .MonitoringQueryLanguageConditionOrBuilder>
-          conditionMonitoringQueryLanguageBuilder_;
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       *
-       * @return Whether the conditionMonitoringQueryLanguage field is set.
-       */
       @java.lang.Override
-      public boolean hasConditionMonitoringQueryLanguage() {
-        return conditionCase_ == 19;
+      public Builder toBuilder() {
+        return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+      }
+
+      @java.lang.Override
+      protected Builder newBuilderForType(
+          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        Builder builder = new Builder(parent);
+        return builder;
       }
       /**
        *
        *
        * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
+       * Control over the rate of notifications sent to this alert policy's
+       * notification channels.
        * 

        *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       *
-       * @return The conditionMonitoringQueryLanguage.
+       * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit}
        */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-          getConditionMonitoringQueryLanguage() {
-        if (conditionMonitoringQueryLanguageBuilder_ == null) {
-          if (conditionCase_ == 19) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-                condition_;
+      public static final class Builder
+          extends com.google.protobuf.GeneratedMessageV3.Builder
+          implements
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder {
+        public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor;
+        }
+
+        @java.lang.Override
+        protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+            internalGetFieldAccessorTable() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_fieldAccessorTable
+              .ensureFieldAccessorsInitialized(
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.class,
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
+                      .class);
+        }
+
+        // Construct using
+        // com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.newBuilder()
+        private Builder() {}
+
+        private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+          super(parent);
+        }
+
+        @java.lang.Override
+        public Builder clear() {
+          super.clear();
+          bitField0_ = 0;
+          period_ = null;
+          if (periodBuilder_ != null) {
+            periodBuilder_.dispose();
+            periodBuilder_ = null;
           }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
+          return this;
+        }
+
+        @java.lang.Override
+        public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+          return com.google.monitoring.v3.AlertProto
+              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor;
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+            getDefaultInstanceForType() {
+          return com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
               .getDefaultInstance();
-        } else {
-          if (conditionCase_ == 19) {
-            return conditionMonitoringQueryLanguageBuilder_.getMessage();
+        }
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit build() {
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit result =
+              buildPartial();
+          if (!result.isInitialized()) {
+            throw newUninitializedMessageException(result);
           }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-              .getDefaultInstance();
+          return result;
         }
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      public Builder setConditionMonitoringQueryLanguage(
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition value) {
-        if (conditionMonitoringQueryLanguageBuilder_ == null) {
-          if (value == null) {
-            throw new NullPointerException();
+
+        @java.lang.Override
+        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+            buildPartial() {
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit result =
+              new com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit(this);
+          if (bitField0_ != 0) {
+            buildPartial0(result);
+          }
+          onBuilt();
+          return result;
+        }
+
+        private void buildPartial0(
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit result) {
+          int from_bitField0_ = bitField0_;
+          if (((from_bitField0_ & 0x00000001) != 0)) {
+            result.period_ = periodBuilder_ == null ? period_ : periodBuilder_.build();
+          }
+        }
+
+        @java.lang.Override
+        public Builder clone() {
+          return super.clone();
+        }
+
+        @java.lang.Override
+        public Builder setField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.setField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+          return super.clearField(field);
+        }
+
+        @java.lang.Override
+        public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+          return super.clearOneof(oneof);
+        }
+
+        @java.lang.Override
+        public Builder setRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field,
+            int index,
+            java.lang.Object value) {
+          return super.setRepeatedField(field, index, value);
+        }
+
+        @java.lang.Override
+        public Builder addRepeatedField(
+            com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+          return super.addRepeatedField(field, value);
+        }
+
+        @java.lang.Override
+        public Builder mergeFrom(com.google.protobuf.Message other) {
+          if (other
+              instanceof com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit) {
+            return mergeFrom(
+                (com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit) other);
+          } else {
+            super.mergeFrom(other);
+            return this;
+          }
+        }
+
+        public Builder mergeFrom(
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit other) {
+          if (other
+              == com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+                  .getDefaultInstance()) return this;
+          if (other.hasPeriod()) {
+            mergePeriod(other.getPeriod());
           }
-          condition_ = value;
+          this.mergeUnknownFields(other.getUnknownFields());
           onChanged();
-        } else {
-          conditionMonitoringQueryLanguageBuilder_.setMessage(value);
+          return this;
         }
-        conditionCase_ = 19;
-        return this;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      public Builder setConditionMonitoringQueryLanguage(
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition.Builder
-              builderForValue) {
-        if (conditionMonitoringQueryLanguageBuilder_ == null) {
-          condition_ = builderForValue.build();
-          onChanged();
-        } else {
-          conditionMonitoringQueryLanguageBuilder_.setMessage(builderForValue.build());
+
+        @java.lang.Override
+        public final boolean isInitialized() {
+          return true;
         }
-        conditionCase_ = 19;
-        return this;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      public Builder mergeConditionMonitoringQueryLanguage(
-          com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition value) {
-        if (conditionMonitoringQueryLanguageBuilder_ == null) {
-          if (conditionCase_ == 19
-              && condition_
-                  != com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-                      .getDefaultInstance()) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-                    .newBuilder(
-                        (com.google.monitoring.v3.AlertPolicy.Condition
-                                .MonitoringQueryLanguageCondition)
-                            condition_)
-                    .mergeFrom(value)
-                    .buildPartial();
-          } else {
-            condition_ = value;
+
+        @java.lang.Override
+        public Builder mergeFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws java.io.IOException {
+          if (extensionRegistry == null) {
+            throw new java.lang.NullPointerException();
           }
-          onChanged();
-        } else {
-          if (conditionCase_ == 19) {
-            conditionMonitoringQueryLanguageBuilder_.mergeFrom(value);
+          try {
+            boolean done = false;
+            while (!done) {
+              int tag = input.readTag();
+              switch (tag) {
+                case 0:
+                  done = true;
+                  break;
+                case 10:
+                  {
+                    input.readMessage(getPeriodFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000001;
+                    break;
+                  } // case 10
+                default:
+                  {
+                    if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                      done = true; // was an endgroup tag
+                    }
+                    break;
+                  } // default:
+              } // switch (tag)
+            } // while (!done)
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.unwrapIOException();
+          } finally {
+            onChanged();
+          } // finally
+          return this;
+        }
+
+        private int bitField0_;
+
+        private com.google.protobuf.Duration period_;
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            periodBuilder_;
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         *
+         * @return Whether the period field is set.
+         */
+        public boolean hasPeriod() {
+          return ((bitField0_ & 0x00000001) != 0);
+        }
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         *
+         * @return The period.
+         */
+        public com.google.protobuf.Duration getPeriod() {
+          if (periodBuilder_ == null) {
+            return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
           } else {
-            conditionMonitoringQueryLanguageBuilder_.setMessage(value);
+            return periodBuilder_.getMessage();
           }
         }
-        conditionCase_ = 19;
-        return this;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      public Builder clearConditionMonitoringQueryLanguage() {
-        if (conditionMonitoringQueryLanguageBuilder_ == null) {
-          if (conditionCase_ == 19) {
-            conditionCase_ = 0;
-            condition_ = null;
-            onChanged();
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        public Builder setPeriod(com.google.protobuf.Duration value) {
+          if (periodBuilder_ == null) {
+            if (value == null) {
+              throw new NullPointerException();
+            }
+            period_ = value;
+          } else {
+            periodBuilder_.setMessage(value);
           }
-        } else {
-          if (conditionCase_ == 19) {
-            conditionCase_ = 0;
-            condition_ = null;
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        public Builder setPeriod(com.google.protobuf.Duration.Builder builderForValue) {
+          if (periodBuilder_ == null) {
+            period_ = builderForValue.build();
+          } else {
+            periodBuilder_.setMessage(builderForValue.build());
           }
-          conditionMonitoringQueryLanguageBuilder_.clear();
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
         }
-        return this;
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      public com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition.Builder
-          getConditionMonitoringQueryLanguageBuilder() {
-        return getConditionMonitoringQueryLanguageFieldBuilder().getBuilder();
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.Condition
-              .MonitoringQueryLanguageConditionOrBuilder
-          getConditionMonitoringQueryLanguageOrBuilder() {
-        if ((conditionCase_ == 19) && (conditionMonitoringQueryLanguageBuilder_ != null)) {
-          return conditionMonitoringQueryLanguageBuilder_.getMessageOrBuilder();
-        } else {
-          if (conditionCase_ == 19) {
-            return (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-                condition_;
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        public Builder mergePeriod(com.google.protobuf.Duration value) {
+          if (periodBuilder_ == null) {
+            if (((bitField0_ & 0x00000001) != 0)
+                && period_ != null
+                && period_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getPeriodBuilder().mergeFrom(value);
+            } else {
+              period_ = value;
+            }
+          } else {
+            periodBuilder_.mergeFrom(value);
           }
-          return com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-              .getDefaultInstance();
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
         }
-      }
-      /**
-       *
-       *
-       * 
-       * A condition that uses the Monitoring Query Language to define
-       * alerts.
-       * 

-       *
-       * 
-       * .google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
-       * 
-       */
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition,
-              com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-                  .Builder,
-              com.google.monitoring.v3.AlertPolicy.Condition
-                  .MonitoringQueryLanguageConditionOrBuilder>
-          getConditionMonitoringQueryLanguageFieldBuilder() {
-        if (conditionMonitoringQueryLanguageBuilder_ == null) {
-          if (!(conditionCase_ == 19)) {
-            condition_ =
-                com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-                    .getDefaultInstance();
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        public Builder clearPeriod() {
+          bitField0_ = (bitField0_ & ~0x00000001);
+          period_ = null;
+          if (periodBuilder_ != null) {
+            periodBuilder_.dispose();
+            periodBuilder_ = null;
           }
-          conditionMonitoringQueryLanguageBuilder_ =
-              new com.google.protobuf.SingleFieldBuilderV3<
-                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition,
-                  com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition
-                      .Builder,
-                  com.google.monitoring.v3.AlertPolicy.Condition
-                      .MonitoringQueryLanguageConditionOrBuilder>(
-                  (com.google.monitoring.v3.AlertPolicy.Condition.MonitoringQueryLanguageCondition)
-                      condition_,
-                  getParentForChildren(),
-                  isClean());
-          condition_ = null;
+          onChanged();
+          return this;
         }
-        conditionCase_ = 19;
-        onChanged();
-        return conditionMonitoringQueryLanguageBuilder_;
-      }
-
-      @java.lang.Override
-      public final Builder setUnknownFields(
-          final com.google.protobuf.UnknownFieldSet unknownFields) {
-        return super.setUnknownFields(unknownFields);
-      }
-
-      @java.lang.Override
-      public final Builder mergeUnknownFields(
-          final com.google.protobuf.UnknownFieldSet unknownFields) {
-        return super.mergeUnknownFields(unknownFields);
-      }
-
-      // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.Condition)
-    }
-
-    // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.Condition)
-    private static final com.google.monitoring.v3.AlertPolicy.Condition DEFAULT_INSTANCE;
-
-    static {
-      DEFAULT_INSTANCE = new com.google.monitoring.v3.AlertPolicy.Condition();
-    }
-
-    public static com.google.monitoring.v3.AlertPolicy.Condition getDefaultInstance() {
-      return DEFAULT_INSTANCE;
-    }
-
-    private static final com.google.protobuf.Parser PARSER =
-        new com.google.protobuf.AbstractParser() {
-          @java.lang.Override
-          public Condition parsePartialFrom(
-              com.google.protobuf.CodedInputStream input,
-              com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-              throws com.google.protobuf.InvalidProtocolBufferException {
-            Builder builder = newBuilder();
-            try {
-              builder.mergeFrom(input, extensionRegistry);
-            } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-              throw e.setUnfinishedMessage(builder.buildPartial());
-            } catch (com.google.protobuf.UninitializedMessageException e) {
-              throw e.asInvalidProtocolBufferException()
-                  .setUnfinishedMessage(builder.buildPartial());
-            } catch (java.io.IOException e) {
-              throw new com.google.protobuf.InvalidProtocolBufferException(e)
-                  .setUnfinishedMessage(builder.buildPartial());
-            }
-            return builder.buildPartial();
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        public com.google.protobuf.Duration.Builder getPeriodBuilder() {
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return getPeriodFieldBuilder().getBuilder();
+        }
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        public com.google.protobuf.DurationOrBuilder getPeriodOrBuilder() {
+          if (periodBuilder_ != null) {
+            return periodBuilder_.getMessageOrBuilder();
+          } else {
+            return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
           }
-        };
-
-    public static com.google.protobuf.Parser parser() {
-      return PARSER;
-    }
-
-    @java.lang.Override
-    public com.google.protobuf.Parser getParserForType() {
-      return PARSER;
-    }
-
-    @java.lang.Override
-    public com.google.monitoring.v3.AlertPolicy.Condition getDefaultInstanceForType() {
-      return DEFAULT_INSTANCE;
-    }
-  }
+        }
+        /**
+         *
+         *
+         * 
+         * Not more than one notification per `period`.
+         * 

+         *
+         * .google.protobuf.Duration period = 1;
+         */
+        private com.google.protobuf.SingleFieldBuilderV3<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>
+            getPeriodFieldBuilder() {
+          if (periodBuilder_ == null) {
+            periodBuilder_ =
+                new com.google.protobuf.SingleFieldBuilderV3<
+                    com.google.protobuf.Duration,
+                    com.google.protobuf.Duration.Builder,
+                    com.google.protobuf.DurationOrBuilder>(
+                    getPeriod(), getParentForChildren(), isClean());
+            period_ = null;
+          }
+          return periodBuilder_;
+        }
 
-  public interface AlertStrategyOrBuilder
-      extends
-      // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.AlertStrategy)
-      com.google.protobuf.MessageOrBuilder {
+        @java.lang.Override
+        public final Builder setUnknownFields(
+            final com.google.protobuf.UnknownFieldSet unknownFields) {
+          return super.setUnknownFields(unknownFields);
+        }
 
-    /**
-     *
-     *
-     * 
-     * Required for alert policies with a `LogMatch` condition.
-     *
-     * This limit is not implemented for alert policies that are not log-based.
-     * 

-     *
-     * 
-     * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
-     * 
-     *
-     * @return Whether the notificationRateLimit field is set.
-     */
-    boolean hasNotificationRateLimit();
-    /**
-     *
-     *
-     * 
-     * Required for alert policies with a `LogMatch` condition.
-     *
-     * This limit is not implemented for alert policies that are not log-based.
-     * 

-     *
-     * 
-     * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
-     * 
-     *
-     * @return The notificationRateLimit.
-     */
-    com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
-        getNotificationRateLimit();
-    /**
-     *
-     *
-     * 
-     * Required for alert policies with a `LogMatch` condition.
-     *
-     * This limit is not implemented for alert policies that are not log-based.
-     * 

-     *
-     * 
-     * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
-     * 
-     */
-    com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder
-        getNotificationRateLimitOrBuilder();
+        @java.lang.Override
+        public final Builder mergeUnknownFields(
+            final com.google.protobuf.UnknownFieldSet unknownFields) {
+          return super.mergeUnknownFields(unknownFields);
+        }
 
-    /**
-     *
-     *
-     * 
-     * If an alert policy that was active has no data for this long, any open
-     * incidents will close
-     * 

-     *
-     * .google.protobuf.Duration auto_close = 3;
-     *
-     * @return Whether the autoClose field is set.
-     */
-    boolean hasAutoClose();
-    /**
-     *
-     *
-     * 
-     * If an alert policy that was active has no data for this long, any open
-     * incidents will close
-     * 

-     *
-     * .google.protobuf.Duration auto_close = 3;
-     *
-     * @return The autoClose.
-     */
-    com.google.protobuf.Duration getAutoClose();
-    /**
-     *
-     *
-     * 
-     * If an alert policy that was active has no data for this long, any open
-     * incidents will close
-     * 

-     *
-     * .google.protobuf.Duration auto_close = 3;
-     */
-    com.google.protobuf.DurationOrBuilder getAutoCloseOrBuilder();
-  }
-  /**
-   *
-   *
-   * 
-   * Control over how the notification channels in `notification_channels`
-   * are notified when this alert fires.
-   * 

-   *
-   * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy}
-   */
-  public static final class AlertStrategy extends com.google.protobuf.GeneratedMessageV3
-      implements
-      // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.AlertStrategy)
-      AlertStrategyOrBuilder {
-    private static final long serialVersionUID = 0L;
-    // Use AlertStrategy.newBuilder() to construct.
-    private AlertStrategy(com.google.protobuf.GeneratedMessageV3.Builder builder) {
-      super(builder);
-    }
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+      }
 
-    private AlertStrategy() {}
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+      private static final com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          DEFAULT_INSTANCE;
 
-    @java.lang.Override
-    @SuppressWarnings({"unused"})
-    protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
-      return new AlertStrategy();
-    }
+      static {
+        DEFAULT_INSTANCE =
+            new com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit();
+      }
 
-    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
-      return com.google.monitoring.v3.AlertProto
-          .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor;
-    }
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          getDefaultInstance() {
+        return DEFAULT_INSTANCE;
+      }
 
-    @java.lang.Override
-    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-        internalGetFieldAccessorTable() {
-      return com.google.monitoring.v3.AlertProto
-          .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_fieldAccessorTable
-          .ensureFieldAccessorsInitialized(
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.class,
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.Builder.class);
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
+            @java.lang.Override
+            public NotificationRateLimit parsePartialFrom(
+                com.google.protobuf.CodedInputStream input,
+                com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+                throws com.google.protobuf.InvalidProtocolBufferException {
+              Builder builder = newBuilder();
+              try {
+                builder.mergeFrom(input, extensionRegistry);
+              } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+                throw e.setUnfinishedMessage(builder.buildPartial());
+              } catch (com.google.protobuf.UninitializedMessageException e) {
+                throw e.asInvalidProtocolBufferException()
+                    .setUnfinishedMessage(builder.buildPartial());
+              } catch (java.io.IOException e) {
+                throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                    .setUnfinishedMessage(builder.buildPartial());
+              }
+              return builder.buildPartial();
+            }
+          };
+
+      public static com.google.protobuf.Parser parser() {
+        return PARSER;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Parser getParserForType() {
+        return PARSER;
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          getDefaultInstanceForType() {
+        return DEFAULT_INSTANCE;
+      }
     }
 
-    public interface NotificationRateLimitOrBuilder
+    public interface NotificationChannelStrategyOrBuilder
         extends
-        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+        // @@protoc_insertion_point(interface_extends:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)
         com.google.protobuf.MessageOrBuilder {
 
       /**
        *
        *
        * 
-       * Not more than one notification per `period`.
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
        * 

        *
-       * .google.protobuf.Duration period = 1;
+       * repeated string notification_channel_names = 1;
        *
-       * @return Whether the period field is set.
+       * @return A list containing the notificationChannelNames.
        */
-      boolean hasPeriod();
+      java.util.List getNotificationChannelNamesList();
       /**
        *
        *
        * 
-       * Not more than one notification per `period`.
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
        * 

        *
-       * .google.protobuf.Duration period = 1;
+       * repeated string notification_channel_names = 1;
        *
-       * @return The period.
+       * @return The count of notificationChannelNames.
        */
-      com.google.protobuf.Duration getPeriod();
+      int getNotificationChannelNamesCount();
       /**
        *
        *
        * 
-       * Not more than one notification per `period`.
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
        * 

        *
-       * .google.protobuf.Duration period = 1;
+       * repeated string notification_channel_names = 1;
+       *
+       * @param index The index of the element to return.
+       * @return The notificationChannelNames at the given index.
        */
-      com.google.protobuf.DurationOrBuilder getPeriodOrBuilder();
+      java.lang.String getNotificationChannelNames(int index);
+      /**
+       *
+       *
+       * 
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+       * 

+       *
+       * repeated string notification_channel_names = 1;
+       *
+       * @param index The index of the value to return.
+       * @return The bytes of the notificationChannelNames at the given index.
+       */
+      com.google.protobuf.ByteString getNotificationChannelNamesBytes(int index);
+
+      /**
+       *
+       *
+       * 
+       * The frequency at which to send reminder notifications for open
+       * incidents.
+       * 

+       *
+       * .google.protobuf.Duration renotify_interval = 2;
+       *
+       * @return Whether the renotifyInterval field is set.
+       */
+      boolean hasRenotifyInterval();
+      /**
+       *
+       *
+       * 
+       * The frequency at which to send reminder notifications for open
+       * incidents.
+       * 

+       *
+       * .google.protobuf.Duration renotify_interval = 2;
+       *
+       * @return The renotifyInterval.
+       */
+      com.google.protobuf.Duration getRenotifyInterval();
+      /**
+       *
+       *
+       * 
+       * The frequency at which to send reminder notifications for open
+       * incidents.
+       * 

+       *
+       * .google.protobuf.Duration renotify_interval = 2;
+       */
+      com.google.protobuf.DurationOrBuilder getRenotifyIntervalOrBuilder();
     }
     /**
      *
      *
      * 
-     * Control over the rate of notifications sent to this alert policy's
-     * notification channels.
+     * Control over how the notification channels in `notification_channels`
+     * are notified when this alert fires, on a per-channel basis.
      * 

      *
-     * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit}
+     * Protobuf type {@code
+     * google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy}
      */
-    public static final class NotificationRateLimit extends com.google.protobuf.GeneratedMessageV3
+    public static final class NotificationChannelStrategy
+        extends com.google.protobuf.GeneratedMessageV3
         implements
-        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
-        NotificationRateLimitOrBuilder {
+        // @@protoc_insertion_point(message_implements:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)
+        NotificationChannelStrategyOrBuilder {
       private static final long serialVersionUID = 0L;
-      // Use NotificationRateLimit.newBuilder() to construct.
-      private NotificationRateLimit(com.google.protobuf.GeneratedMessageV3.Builder builder) {
+      // Use NotificationChannelStrategy.newBuilder() to construct.
+      private NotificationChannelStrategy(
+          com.google.protobuf.GeneratedMessageV3.Builder builder) {
         super(builder);
       }
 
-      private NotificationRateLimit() {}
+      private NotificationChannelStrategy() {
+        notificationChannelNames_ = com.google.protobuf.LazyStringArrayList.emptyList();
+      }
 
       @java.lang.Override
       @SuppressWarnings({"unused"})
       protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
-        return new NotificationRateLimit();
+        return new NotificationChannelStrategy();
       }
 
       public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
         return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor;
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_descriptor;
       }
 
       @java.lang.Override
       protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
           internalGetFieldAccessorTable() {
         return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_fieldAccessorTable
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_fieldAccessorTable
             .ensureFieldAccessorsInitialized(
-                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.class,
-                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
-                    .class);
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                    .class,
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                    .Builder.class);
       }
 
-      public static final int PERIOD_FIELD_NUMBER = 1;
-      private com.google.protobuf.Duration period_;
+      public static final int NOTIFICATION_CHANNEL_NAMES_FIELD_NUMBER = 1;
+
+      @SuppressWarnings("serial")
+      private com.google.protobuf.LazyStringArrayList notificationChannelNames_ =
+          com.google.protobuf.LazyStringArrayList.emptyList();
       /**
        *
        *
        * 
-       * Not more than one notification per `period`.
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
        * 

        *
-       * .google.protobuf.Duration period = 1;
+       * repeated string notification_channel_names = 1;
        *
-       * @return Whether the period field is set.
+       * @return A list containing the notificationChannelNames.
+       */
+      public com.google.protobuf.ProtocolStringList getNotificationChannelNamesList() {
+        return notificationChannelNames_;
+      }
+      /**
+       *
+       *
+       * 
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+       * 

+       *
+       * repeated string notification_channel_names = 1;
+       *
+       * @return The count of notificationChannelNames.
+       */
+      public int getNotificationChannelNamesCount() {
+        return notificationChannelNames_.size();
+      }
+      /**
+       *
+       *
+       * 
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+       * 

+       *
+       * repeated string notification_channel_names = 1;
+       *
+       * @param index The index of the element to return.
+       * @return The notificationChannelNames at the given index.
+       */
+      public java.lang.String getNotificationChannelNames(int index) {
+        return notificationChannelNames_.get(index);
+      }
+      /**
+       *
+       *
+       * 
+       * The full REST resource name for the notification channels that these
+       * settings apply to. Each of these correspond to the name field in one
+       * of the NotificationChannel objects referenced in the
+       * notification_channels field of this AlertPolicy.
+       * The format is:
+       *
+       *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+       * 

+       *
+       * repeated string notification_channel_names = 1;
+       *
+       * @param index The index of the value to return.
+       * @return The bytes of the notificationChannelNames at the given index.
+       */
+      public com.google.protobuf.ByteString getNotificationChannelNamesBytes(int index) {
+        return notificationChannelNames_.getByteString(index);
+      }
+
+      public static final int RENOTIFY_INTERVAL_FIELD_NUMBER = 2;
+      private com.google.protobuf.Duration renotifyInterval_;
+      /**
+       *
+       *
+       * 
+       * The frequency at which to send reminder notifications for open
+       * incidents.
+       * 

+       *
+       * .google.protobuf.Duration renotify_interval = 2;
+       *
+       * @return Whether the renotifyInterval field is set.
        */
       @java.lang.Override
-      public boolean hasPeriod() {
-        return period_ != null;
+      public boolean hasRenotifyInterval() {
+        return renotifyInterval_ != null;
       }
       /**
        *
        *
        * 
-       * Not more than one notification per `period`.
+       * The frequency at which to send reminder notifications for open
+       * incidents.
        * 

        *
-       * .google.protobuf.Duration period = 1;
+       * .google.protobuf.Duration renotify_interval = 2;
        *
-       * @return The period.
+       * @return The renotifyInterval.
        */
       @java.lang.Override
-      public com.google.protobuf.Duration getPeriod() {
-        return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
+      public com.google.protobuf.Duration getRenotifyInterval() {
+        return renotifyInterval_ == null
+            ? com.google.protobuf.Duration.getDefaultInstance()
+            : renotifyInterval_;
       }
       /**
        *
        *
        * 
-       * Not more than one notification per `period`.
+       * The frequency at which to send reminder notifications for open
+       * incidents.
        * 

        *
-       * .google.protobuf.Duration period = 1;
+       * .google.protobuf.Duration renotify_interval = 2;
        */
       @java.lang.Override
-      public com.google.protobuf.DurationOrBuilder getPeriodOrBuilder() {
-        return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
+      public com.google.protobuf.DurationOrBuilder getRenotifyIntervalOrBuilder() {
+        return renotifyInterval_ == null
+            ? com.google.protobuf.Duration.getDefaultInstance()
+            : renotifyInterval_;
       }
 
       private byte memoizedIsInitialized = -1;
@@ -14436,8 +20144,12 @@ public final boolean isInitialized() {
 
       @java.lang.Override
       public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
-        if (period_ != null) {
-          output.writeMessage(1, getPeriod());
+        for (int i = 0; i < notificationChannelNames_.size(); i++) {
+          com.google.protobuf.GeneratedMessageV3.writeString(
+              output, 1, notificationChannelNames_.getRaw(i));
+        }
+        if (renotifyInterval_ != null) {
+          output.writeMessage(2, getRenotifyInterval());
         }
         getUnknownFields().writeTo(output);
       }
@@ -14448,8 +20160,17 @@ public int getSerializedSize() {
         if (size != -1) return size;
 
         size = 0;
-        if (period_ != null) {
-          size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getPeriod());
+        {
+          int dataSize = 0;
+          for (int i = 0; i < notificationChannelNames_.size(); i++) {
+            dataSize += computeStringSizeNoTag(notificationChannelNames_.getRaw(i));
+          }
+          size += dataSize;
+          size += 1 * getNotificationChannelNamesList().size();
+        }
+        if (renotifyInterval_ != null) {
+          size +=
+              com.google.protobuf.CodedOutputStream.computeMessageSize(2, getRenotifyInterval());
         }
         size += getUnknownFields().getSerializedSize();
         memoizedSize = size;
@@ -14462,15 +20183,18 @@ public boolean equals(final java.lang.Object obj) {
           return true;
         }
         if (!(obj
-            instanceof com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)) {
+            instanceof
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)) {
           return super.equals(obj);
         }
-        com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit other =
-            (com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit) obj;
+        com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy other =
+            (com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy) obj;
 
-        if (hasPeriod() != other.hasPeriod()) return false;
-        if (hasPeriod()) {
-          if (!getPeriod().equals(other.getPeriod())) return false;
+        if (!getNotificationChannelNamesList().equals(other.getNotificationChannelNamesList()))
+          return false;
+        if (hasRenotifyInterval() != other.hasRenotifyInterval()) return false;
+        if (hasRenotifyInterval()) {
+          if (!getRenotifyInterval().equals(other.getRenotifyInterval())) return false;
         }
         if (!getUnknownFields().equals(other.getUnknownFields())) return false;
         return true;
@@ -14483,35 +20207,39 @@ public int hashCode() {
         }
         int hash = 41;
         hash = (19 * hash) + getDescriptor().hashCode();
-        if (hasPeriod()) {
-          hash = (37 * hash) + PERIOD_FIELD_NUMBER;
-          hash = (53 * hash) + getPeriod().hashCode();
+        if (getNotificationChannelNamesCount() > 0) {
+          hash = (37 * hash) + NOTIFICATION_CHANNEL_NAMES_FIELD_NUMBER;
+          hash = (53 * hash) + getNotificationChannelNamesList().hashCode();
+        }
+        if (hasRenotifyInterval()) {
+          hash = (37 * hash) + RENOTIFY_INTERVAL_FIELD_NUMBER;
+          hash = (53 * hash) + getRenotifyInterval().hashCode();
         }
         hash = (29 * hash) + getUnknownFields().hashCode();
         memoizedHashCode = hash;
         return hash;
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(java.nio.ByteBuffer data)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(
               java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(com.google.protobuf.ByteString data)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(
               com.google.protobuf.ByteString data,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -14519,23 +20247,23 @@ public int hashCode() {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(byte[] data) throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
               throws com.google.protobuf.InvalidProtocolBufferException {
         return PARSER.parseFrom(data, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(java.io.InputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(
               java.io.InputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -14544,12 +20272,12 @@ public int hashCode() {
             PARSER, input, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseDelimitedFrom(java.io.InputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseDelimitedFrom(
               java.io.InputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -14558,12 +20286,12 @@ public int hashCode() {
             PARSER, input, extensionRegistry);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(com.google.protobuf.CodedInputStream input) throws java.io.IOException {
         return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           parseFrom(
               com.google.protobuf.CodedInputStream input,
               com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -14582,7 +20310,8 @@ public static Builder newBuilder() {
       }
 
       public static Builder newBuilder(
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit prototype) {
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+              prototype) {
         return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
       }
 
@@ -14601,35 +20330,37 @@ protected Builder newBuilderForType(
        *
        *
        * 
-       * Control over the rate of notifications sent to this alert policy's
-       * notification channels.
+       * Control over how the notification channels in `notification_channels`
+       * are notified when this alert fires, on a per-channel basis.
        * 

        *
-       * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit}
+       * Protobuf type {@code
+       * google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy}
        */
       public static final class Builder
           extends com.google.protobuf.GeneratedMessageV3.Builder
           implements
-          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder {
+          // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategyOrBuilder {
         public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor;
+              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_descriptor;
         }
 
         @java.lang.Override
         protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
             internalGetFieldAccessorTable() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_fieldAccessorTable
+              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_fieldAccessorTable
               .ensureFieldAccessorsInitialized(
-                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.class,
-                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
-                      .class);
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                      .class,
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                      .Builder.class);
         }
 
         // Construct using
-        // com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.newBuilder()
+        // com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.newBuilder()
         private Builder() {}
 
         private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
@@ -14640,10 +20371,11 @@ private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
         public Builder clear() {
           super.clear();
           bitField0_ = 0;
-          period_ = null;
-          if (periodBuilder_ != null) {
-            periodBuilder_.dispose();
-            periodBuilder_ = null;
+          notificationChannelNames_ = com.google.protobuf.LazyStringArrayList.emptyList();
+          renotifyInterval_ = null;
+          if (renotifyIntervalBuilder_ != null) {
+            renotifyIntervalBuilder_.dispose();
+            renotifyIntervalBuilder_ = null;
           }
           return this;
         }
@@ -14651,19 +20383,20 @@ public Builder clear() {
         @java.lang.Override
         public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
           return com.google.monitoring.v3.AlertProto
-              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor;
+              .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_descriptor;
         }
 
         @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
             getDefaultInstanceForType() {
-          return com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          return com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
               .getDefaultInstance();
         }
 
         @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit build() {
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit result =
+        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+            build() {
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy result =
               buildPartial();
           if (!result.isInitialized()) {
             throw newUninitializedMessageException(result);
@@ -14672,10 +20405,11 @@ public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
         }
 
         @java.lang.Override
-        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+        public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
             buildPartial() {
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit result =
-              new com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit(this);
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy result =
+              new com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy(
+                  this);
           if (bitField0_ != 0) {
             buildPartial0(result);
           }
@@ -14684,10 +20418,17 @@ public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
         }
 
         private void buildPartial0(
-            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit result) {
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy result) {
           int from_bitField0_ = bitField0_;
           if (((from_bitField0_ & 0x00000001) != 0)) {
-            result.period_ = periodBuilder_ == null ? period_ : periodBuilder_.build();
+            notificationChannelNames_.makeImmutable();
+            result.notificationChannelNames_ = notificationChannelNames_;
+          }
+          if (((from_bitField0_ & 0x00000002) != 0)) {
+            result.renotifyInterval_ =
+                renotifyIntervalBuilder_ == null
+                    ? renotifyInterval_
+                    : renotifyIntervalBuilder_.build();
           }
         }
 
@@ -14729,9 +20470,11 @@ public Builder addRepeatedField(
         @java.lang.Override
         public Builder mergeFrom(com.google.protobuf.Message other) {
           if (other
-              instanceof com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit) {
+              instanceof
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy) {
             return mergeFrom(
-                (com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit) other);
+                (com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)
+                    other);
           } else {
             super.mergeFrom(other);
             return this;
@@ -14739,12 +20482,22 @@ public Builder mergeFrom(com.google.protobuf.Message other) {
         }
 
         public Builder mergeFrom(
-            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit other) {
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy other) {
           if (other
-              == com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+              == com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
                   .getDefaultInstance()) return this;
-          if (other.hasPeriod()) {
-            mergePeriod(other.getPeriod());
+          if (!other.notificationChannelNames_.isEmpty()) {
+            if (notificationChannelNames_.isEmpty()) {
+              notificationChannelNames_ = other.notificationChannelNames_;
+              bitField0_ |= 0x00000001;
+            } else {
+              ensureNotificationChannelNamesIsMutable();
+              notificationChannelNames_.addAll(other.notificationChannelNames_);
+            }
+            onChanged();
+          }
+          if (other.hasRenotifyInterval()) {
+            mergeRenotifyInterval(other.getRenotifyInterval());
           }
           this.mergeUnknownFields(other.getUnknownFields());
           onChanged();
@@ -14774,10 +20527,18 @@ public Builder mergeFrom(
                   break;
                 case 10:
                   {
-                    input.readMessage(getPeriodFieldBuilder().getBuilder(), extensionRegistry);
-                    bitField0_ |= 0x00000001;
+                    java.lang.String s = input.readStringRequireUtf8();
+                    ensureNotificationChannelNamesIsMutable();
+                    notificationChannelNames_.add(s);
                     break;
                   } // case 10
+                case 18:
+                  {
+                    input.readMessage(
+                        getRenotifyIntervalFieldBuilder().getBuilder(), extensionRegistry);
+                    bitField0_ |= 0x00000002;
+                    break;
+                  } // case 18
                 default:
                   {
                     if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -14797,63 +20558,297 @@ public Builder mergeFrom(
 
         private int bitField0_;
 
-        private com.google.protobuf.Duration period_;
+        private com.google.protobuf.LazyStringArrayList notificationChannelNames_ =
+            com.google.protobuf.LazyStringArrayList.emptyList();
+
+        private void ensureNotificationChannelNamesIsMutable() {
+          if (!notificationChannelNames_.isModifiable()) {
+            notificationChannelNames_ =
+                new com.google.protobuf.LazyStringArrayList(notificationChannelNames_);
+          }
+          bitField0_ |= 0x00000001;
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @return A list containing the notificationChannelNames.
+         */
+        public com.google.protobuf.ProtocolStringList getNotificationChannelNamesList() {
+          notificationChannelNames_.makeImmutable();
+          return notificationChannelNames_;
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @return The count of notificationChannelNames.
+         */
+        public int getNotificationChannelNamesCount() {
+          return notificationChannelNames_.size();
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @param index The index of the element to return.
+         * @return The notificationChannelNames at the given index.
+         */
+        public java.lang.String getNotificationChannelNames(int index) {
+          return notificationChannelNames_.get(index);
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @param index The index of the value to return.
+         * @return The bytes of the notificationChannelNames at the given index.
+         */
+        public com.google.protobuf.ByteString getNotificationChannelNamesBytes(int index) {
+          return notificationChannelNames_.getByteString(index);
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @param index The index to set the value at.
+         * @param value The notificationChannelNames to set.
+         * @return This builder for chaining.
+         */
+        public Builder setNotificationChannelNames(int index, java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureNotificationChannelNamesIsMutable();
+          notificationChannelNames_.set(index, value);
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @param value The notificationChannelNames to add.
+         * @return This builder for chaining.
+         */
+        public Builder addNotificationChannelNames(java.lang.String value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureNotificationChannelNamesIsMutable();
+          notificationChannelNames_.add(value);
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @param values The notificationChannelNames to add.
+         * @return This builder for chaining.
+         */
+        public Builder addAllNotificationChannelNames(java.lang.Iterable values) {
+          ensureNotificationChannelNamesIsMutable();
+          com.google.protobuf.AbstractMessageLite.Builder.addAll(values, notificationChannelNames_);
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @return This builder for chaining.
+         */
+        public Builder clearNotificationChannelNames() {
+          notificationChannelNames_ = com.google.protobuf.LazyStringArrayList.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000001);
+          ;
+          onChanged();
+          return this;
+        }
+        /**
+         *
+         *
+         * 
+         * The full REST resource name for the notification channels that these
+         * settings apply to. Each of these correspond to the name field in one
+         * of the NotificationChannel objects referenced in the
+         * notification_channels field of this AlertPolicy.
+         * The format is:
+         *
+         *     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+         * 

+         *
+         * repeated string notification_channel_names = 1;
+         *
+         * @param value The bytes of the notificationChannelNames to add.
+         * @return This builder for chaining.
+         */
+        public Builder addNotificationChannelNamesBytes(com.google.protobuf.ByteString value) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          checkByteStringIsUtf8(value);
+          ensureNotificationChannelNamesIsMutable();
+          notificationChannelNames_.add(value);
+          bitField0_ |= 0x00000001;
+          onChanged();
+          return this;
+        }
+
+        private com.google.protobuf.Duration renotifyInterval_;
         private com.google.protobuf.SingleFieldBuilderV3<
                 com.google.protobuf.Duration,
                 com.google.protobuf.Duration.Builder,
                 com.google.protobuf.DurationOrBuilder>
-            periodBuilder_;
+            renotifyIntervalBuilder_;
         /**
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          *
-         * @return Whether the period field is set.
+         * @return Whether the renotifyInterval field is set.
          */
-        public boolean hasPeriod() {
-          return ((bitField0_ & 0x00000001) != 0);
+        public boolean hasRenotifyInterval() {
+          return ((bitField0_ & 0x00000002) != 0);
         }
         /**
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          *
-         * @return The period.
+         * @return The renotifyInterval.
          */
-        public com.google.protobuf.Duration getPeriod() {
-          if (periodBuilder_ == null) {
-            return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
+        public com.google.protobuf.Duration getRenotifyInterval() {
+          if (renotifyIntervalBuilder_ == null) {
+            return renotifyInterval_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : renotifyInterval_;
           } else {
-            return periodBuilder_.getMessage();
+            return renotifyIntervalBuilder_.getMessage();
           }
         }
         /**
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
-        public Builder setPeriod(com.google.protobuf.Duration value) {
-          if (periodBuilder_ == null) {
+        public Builder setRenotifyInterval(com.google.protobuf.Duration value) {
+          if (renotifyIntervalBuilder_ == null) {
             if (value == null) {
               throw new NullPointerException();
             }
-            period_ = value;
+            renotifyInterval_ = value;
           } else {
-            periodBuilder_.setMessage(value);
+            renotifyIntervalBuilder_.setMessage(value);
           }
-          bitField0_ |= 0x00000001;
+          bitField0_ |= 0x00000002;
           onChanged();
           return this;
         }
@@ -14861,18 +20856,19 @@ public Builder setPeriod(com.google.protobuf.Duration value) {
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
-        public Builder setPeriod(com.google.protobuf.Duration.Builder builderForValue) {
-          if (periodBuilder_ == null) {
-            period_ = builderForValue.build();
+        public Builder setRenotifyInterval(com.google.protobuf.Duration.Builder builderForValue) {
+          if (renotifyIntervalBuilder_ == null) {
+            renotifyInterval_ = builderForValue.build();
           } else {
-            periodBuilder_.setMessage(builderForValue.build());
+            renotifyIntervalBuilder_.setMessage(builderForValue.build());
           }
-          bitField0_ |= 0x00000001;
+          bitField0_ |= 0x00000002;
           onChanged();
           return this;
         }
@@ -14880,24 +20876,25 @@ public Builder setPeriod(com.google.protobuf.Duration.Builder builderForValue) {
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
-        public Builder mergePeriod(com.google.protobuf.Duration value) {
-          if (periodBuilder_ == null) {
-            if (((bitField0_ & 0x00000001) != 0)
-                && period_ != null
-                && period_ != com.google.protobuf.Duration.getDefaultInstance()) {
-              getPeriodBuilder().mergeFrom(value);
+        public Builder mergeRenotifyInterval(com.google.protobuf.Duration value) {
+          if (renotifyIntervalBuilder_ == null) {
+            if (((bitField0_ & 0x00000002) != 0)
+                && renotifyInterval_ != null
+                && renotifyInterval_ != com.google.protobuf.Duration.getDefaultInstance()) {
+              getRenotifyIntervalBuilder().mergeFrom(value);
             } else {
-              period_ = value;
+              renotifyInterval_ = value;
             }
           } else {
-            periodBuilder_.mergeFrom(value);
+            renotifyIntervalBuilder_.mergeFrom(value);
           }
-          bitField0_ |= 0x00000001;
+          bitField0_ |= 0x00000002;
           onChanged();
           return this;
         }
@@ -14905,17 +20902,18 @@ public Builder mergePeriod(com.google.protobuf.Duration value) {
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
-        public Builder clearPeriod() {
-          bitField0_ = (bitField0_ & ~0x00000001);
-          period_ = null;
-          if (periodBuilder_ != null) {
-            periodBuilder_.dispose();
-            periodBuilder_ = null;
+        public Builder clearRenotifyInterval() {
+          bitField0_ = (bitField0_ & ~0x00000002);
+          renotifyInterval_ = null;
+          if (renotifyIntervalBuilder_ != null) {
+            renotifyIntervalBuilder_.dispose();
+            renotifyIntervalBuilder_ = null;
           }
           onChanged();
           return this;
@@ -14924,56 +20922,61 @@ public Builder clearPeriod() {
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
-        public com.google.protobuf.Duration.Builder getPeriodBuilder() {
-          bitField0_ |= 0x00000001;
+        public com.google.protobuf.Duration.Builder getRenotifyIntervalBuilder() {
+          bitField0_ |= 0x00000002;
           onChanged();
-          return getPeriodFieldBuilder().getBuilder();
+          return getRenotifyIntervalFieldBuilder().getBuilder();
         }
         /**
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
-        public com.google.protobuf.DurationOrBuilder getPeriodOrBuilder() {
-          if (periodBuilder_ != null) {
-            return periodBuilder_.getMessageOrBuilder();
+        public com.google.protobuf.DurationOrBuilder getRenotifyIntervalOrBuilder() {
+          if (renotifyIntervalBuilder_ != null) {
+            return renotifyIntervalBuilder_.getMessageOrBuilder();
           } else {
-            return period_ == null ? com.google.protobuf.Duration.getDefaultInstance() : period_;
+            return renotifyInterval_ == null
+                ? com.google.protobuf.Duration.getDefaultInstance()
+                : renotifyInterval_;
           }
         }
         /**
          *
          *
          * 
-         * Not more than one notification per `period`.
+         * The frequency at which to send reminder notifications for open
+         * incidents.
          * 

          *
-         * .google.protobuf.Duration period = 1;
+         * .google.protobuf.Duration renotify_interval = 2;
          */
         private com.google.protobuf.SingleFieldBuilderV3<
                 com.google.protobuf.Duration,
                 com.google.protobuf.Duration.Builder,
                 com.google.protobuf.DurationOrBuilder>
-            getPeriodFieldBuilder() {
-          if (periodBuilder_ == null) {
-            periodBuilder_ =
+            getRenotifyIntervalFieldBuilder() {
+          if (renotifyIntervalBuilder_ == null) {
+            renotifyIntervalBuilder_ =
                 new com.google.protobuf.SingleFieldBuilderV3<
                     com.google.protobuf.Duration,
                     com.google.protobuf.Duration.Builder,
                     com.google.protobuf.DurationOrBuilder>(
-                    getPeriod(), getParentForChildren(), isClean());
-            period_ = null;
+                    getRenotifyInterval(), getParentForChildren(), isClean());
+            renotifyInterval_ = null;
           }
-          return periodBuilder_;
+          return renotifyIntervalBuilder_;
         }
 
         @java.lang.Override
@@ -14988,27 +20991,28 @@ public final Builder mergeUnknownFields(
           return super.mergeUnknownFields(unknownFields);
         }
 
-        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
+        // @@protoc_insertion_point(builder_scope:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)
       }
 
-      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit)
-      private static final com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      // @@protoc_insertion_point(class_scope:google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy)
+      private static final com.google.monitoring.v3.AlertPolicy.AlertStrategy
+              .NotificationChannelStrategy
           DEFAULT_INSTANCE;
 
       static {
         DEFAULT_INSTANCE =
-            new com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit();
+            new com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy();
       }
 
-      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public static com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           getDefaultInstance() {
         return DEFAULT_INSTANCE;
       }
 
-      private static final com.google.protobuf.Parser PARSER =
-          new com.google.protobuf.AbstractParser() {
+      private static final com.google.protobuf.Parser PARSER =
+          new com.google.protobuf.AbstractParser() {
             @java.lang.Override
-            public NotificationRateLimit parsePartialFrom(
+            public NotificationChannelStrategy parsePartialFrom(
                 com.google.protobuf.CodedInputStream input,
                 com.google.protobuf.ExtensionRegistryLite extensionRegistry)
                 throws com.google.protobuf.InvalidProtocolBufferException {
@@ -15028,17 +21032,17 @@ public NotificationRateLimit parsePartialFrom(
             }
           };
 
-      public static com.google.protobuf.Parser parser() {
+      public static com.google.protobuf.Parser parser() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.protobuf.Parser getParserForType() {
+      public com.google.protobuf.Parser getParserForType() {
         return PARSER;
       }
 
       @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
           getDefaultInstanceForType() {
         return DEFAULT_INSTANCE;
       }
@@ -15160,6 +21164,96 @@ public com.google.protobuf.DurationOrBuilder getAutoCloseOrBuilder() {
       return autoClose_ == null ? com.google.protobuf.Duration.getDefaultInstance() : autoClose_;
     }
 
+    public static final int NOTIFICATION_CHANNEL_STRATEGY_FIELD_NUMBER = 4;
+
+    @SuppressWarnings("serial")
+    private java.util.List<
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy>
+        notificationChannelStrategy_;
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    @java.lang.Override
+    public java.util.List<
+            com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy>
+        getNotificationChannelStrategyList() {
+      return notificationChannelStrategy_;
+    }
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    @java.lang.Override
+    public java.util.List<
+            ? extends
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                    .NotificationChannelStrategyOrBuilder>
+        getNotificationChannelStrategyOrBuilderList() {
+      return notificationChannelStrategy_;
+    }
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    @java.lang.Override
+    public int getNotificationChannelStrategyCount() {
+      return notificationChannelStrategy_.size();
+    }
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+        getNotificationChannelStrategy(int index) {
+      return notificationChannelStrategy_.get(index);
+    }
+    /**
+     *
+     *
+     * 
+     * Control how notifications will be sent out, on a per-channel basis.
+     * 

+     *
+     * 
+     * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+     * 
+     */
+    @java.lang.Override
+    public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategyOrBuilder
+        getNotificationChannelStrategyOrBuilder(int index) {
+      return notificationChannelStrategy_.get(index);
+    }
+
     private byte memoizedIsInitialized = -1;
 
     @java.lang.Override
@@ -15180,6 +21274,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
       if (autoClose_ != null) {
         output.writeMessage(3, getAutoClose());
       }
+      for (int i = 0; i < notificationChannelStrategy_.size(); i++) {
+        output.writeMessage(4, notificationChannelStrategy_.get(i));
+      }
       getUnknownFields().writeTo(output);
     }
 
@@ -15196,6 +21293,11 @@ public int getSerializedSize() {
       if (autoClose_ != null) {
         size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getAutoClose());
       }
+      for (int i = 0; i < notificationChannelStrategy_.size(); i++) {
+        size +=
+            com.google.protobuf.CodedOutputStream.computeMessageSize(
+                4, notificationChannelStrategy_.get(i));
+      }
       size += getUnknownFields().getSerializedSize();
       memoizedSize = size;
       return size;
@@ -15220,6 +21322,8 @@ public boolean equals(final java.lang.Object obj) {
       if (hasAutoClose()) {
         if (!getAutoClose().equals(other.getAutoClose())) return false;
       }
+      if (!getNotificationChannelStrategyList().equals(other.getNotificationChannelStrategyList()))
+        return false;
       if (!getUnknownFields().equals(other.getUnknownFields())) return false;
       return true;
     }
@@ -15239,6 +21343,10 @@ public int hashCode() {
         hash = (37 * hash) + AUTO_CLOSE_FIELD_NUMBER;
         hash = (53 * hash) + getAutoClose().hashCode();
       }
+      if (getNotificationChannelStrategyCount() > 0) {
+        hash = (37 * hash) + NOTIFICATION_CHANNEL_STRATEGY_FIELD_NUMBER;
+        hash = (53 * hash) + getNotificationChannelStrategyList().hashCode();
+      }
       hash = (29 * hash) + getUnknownFields().hashCode();
       memoizedHashCode = hash;
       return hash;
@@ -15321,657 +21429,1153 @@ public Builder newBuilderForType() {
       return newBuilder();
     }
 
-    public static Builder newBuilder() {
-      return DEFAULT_INSTANCE.toBuilder();
-    }
+    public static Builder newBuilder() {
+      return DEFAULT_INSTANCE.toBuilder();
+    }
+
+    public static Builder newBuilder(com.google.monitoring.v3.AlertPolicy.AlertStrategy prototype) {
+      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+    }
+
+    @java.lang.Override
+    public Builder toBuilder() {
+      return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+    }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     *
+     *
+     * 
+     * Control over how the notification channels in `notification_channels`
+     * are notified when this alert fires.
+     * 

+     *
+     * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy}
+     */
+    public static final class Builder
+        extends com.google.protobuf.GeneratedMessageV3.Builder
+        implements
+        // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.AlertStrategy)
+        com.google.monitoring.v3.AlertPolicy.AlertStrategyOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor;
+      }
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.class,
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.Builder.class);
+      }
+
+      // Construct using com.google.monitoring.v3.AlertPolicy.AlertStrategy.newBuilder()
+      private Builder() {}
+
+      private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        super(parent);
+      }
+
+      @java.lang.Override
+      public Builder clear() {
+        super.clear();
+        bitField0_ = 0;
+        notificationRateLimit_ = null;
+        if (notificationRateLimitBuilder_ != null) {
+          notificationRateLimitBuilder_.dispose();
+          notificationRateLimitBuilder_ = null;
+        }
+        autoClose_ = null;
+        if (autoCloseBuilder_ != null) {
+          autoCloseBuilder_.dispose();
+          autoCloseBuilder_ = null;
+        }
+        if (notificationChannelStrategyBuilder_ == null) {
+          notificationChannelStrategy_ = java.util.Collections.emptyList();
+        } else {
+          notificationChannelStrategy_ = null;
+          notificationChannelStrategyBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000004);
+        return this;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+        return com.google.monitoring.v3.AlertProto
+            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor;
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy getDefaultInstanceForType() {
+        return com.google.monitoring.v3.AlertPolicy.AlertStrategy.getDefaultInstance();
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy build() {
+        com.google.monitoring.v3.AlertPolicy.AlertStrategy result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      @java.lang.Override
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy buildPartial() {
+        com.google.monitoring.v3.AlertPolicy.AlertStrategy result =
+            new com.google.monitoring.v3.AlertPolicy.AlertStrategy(this);
+        buildPartialRepeatedFields(result);
+        if (bitField0_ != 0) {
+          buildPartial0(result);
+        }
+        onBuilt();
+        return result;
+      }
+
+      private void buildPartialRepeatedFields(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy result) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          if (((bitField0_ & 0x00000004) != 0)) {
+            notificationChannelStrategy_ =
+                java.util.Collections.unmodifiableList(notificationChannelStrategy_);
+            bitField0_ = (bitField0_ & ~0x00000004);
+          }
+          result.notificationChannelStrategy_ = notificationChannelStrategy_;
+        } else {
+          result.notificationChannelStrategy_ = notificationChannelStrategyBuilder_.build();
+        }
+      }
+
+      private void buildPartial0(com.google.monitoring.v3.AlertPolicy.AlertStrategy result) {
+        int from_bitField0_ = bitField0_;
+        if (((from_bitField0_ & 0x00000001) != 0)) {
+          result.notificationRateLimit_ =
+              notificationRateLimitBuilder_ == null
+                  ? notificationRateLimit_
+                  : notificationRateLimitBuilder_.build();
+        }
+        if (((from_bitField0_ & 0x00000002) != 0)) {
+          result.autoClose_ = autoCloseBuilder_ == null ? autoClose_ : autoCloseBuilder_.build();
+        }
+      }
+
+      @java.lang.Override
+      public Builder clone() {
+        return super.clone();
+      }
+
+      @java.lang.Override
+      public Builder setField(
+          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+        return super.setField(field, value);
+      }
+
+      @java.lang.Override
+      public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
+        return super.clearField(field);
+      }
+
+      @java.lang.Override
+      public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+        return super.clearOneof(oneof);
+      }
+
+      @java.lang.Override
+      public Builder setRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field,
+          int index,
+          java.lang.Object value) {
+        return super.setRepeatedField(field, index, value);
+      }
+
+      @java.lang.Override
+      public Builder addRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
+        return super.addRepeatedField(field, value);
+      }
 
-    public static Builder newBuilder(com.google.monitoring.v3.AlertPolicy.AlertStrategy prototype) {
-      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
-    }
+      @java.lang.Override
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof com.google.monitoring.v3.AlertPolicy.AlertStrategy) {
+          return mergeFrom((com.google.monitoring.v3.AlertPolicy.AlertStrategy) other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
 
-    @java.lang.Override
-    public Builder toBuilder() {
-      return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
-    }
+      public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.AlertStrategy other) {
+        if (other == com.google.monitoring.v3.AlertPolicy.AlertStrategy.getDefaultInstance())
+          return this;
+        if (other.hasNotificationRateLimit()) {
+          mergeNotificationRateLimit(other.getNotificationRateLimit());
+        }
+        if (other.hasAutoClose()) {
+          mergeAutoClose(other.getAutoClose());
+        }
+        if (notificationChannelStrategyBuilder_ == null) {
+          if (!other.notificationChannelStrategy_.isEmpty()) {
+            if (notificationChannelStrategy_.isEmpty()) {
+              notificationChannelStrategy_ = other.notificationChannelStrategy_;
+              bitField0_ = (bitField0_ & ~0x00000004);
+            } else {
+              ensureNotificationChannelStrategyIsMutable();
+              notificationChannelStrategy_.addAll(other.notificationChannelStrategy_);
+            }
+            onChanged();
+          }
+        } else {
+          if (!other.notificationChannelStrategy_.isEmpty()) {
+            if (notificationChannelStrategyBuilder_.isEmpty()) {
+              notificationChannelStrategyBuilder_.dispose();
+              notificationChannelStrategyBuilder_ = null;
+              notificationChannelStrategy_ = other.notificationChannelStrategy_;
+              bitField0_ = (bitField0_ & ~0x00000004);
+              notificationChannelStrategyBuilder_ =
+                  com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
+                      ? getNotificationChannelStrategyFieldBuilder()
+                      : null;
+            } else {
+              notificationChannelStrategyBuilder_.addAllMessages(
+                  other.notificationChannelStrategy_);
+            }
+          }
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        onChanged();
+        return this;
+      }
 
-    @java.lang.Override
-    protected Builder newBuilderForType(
-        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-      Builder builder = new Builder(parent);
-      return builder;
-    }
-    /**
-     *
-     *
-     * 
-     * Control over how the notification channels in `notification_channels`
-     * are notified when this alert fires.
-     * 

-     *
-     * Protobuf type {@code google.monitoring.v3.AlertPolicy.AlertStrategy}
-     */
-    public static final class Builder
-        extends com.google.protobuf.GeneratedMessageV3.Builder
-        implements
-        // @@protoc_insertion_point(builder_implements:google.monitoring.v3.AlertPolicy.AlertStrategy)
-        com.google.monitoring.v3.AlertPolicy.AlertStrategyOrBuilder {
-      public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor;
+      @java.lang.Override
+      public final boolean isInitialized() {
+        return true;
       }
 
       @java.lang.Override
-      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
-          internalGetFieldAccessorTable() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_fieldAccessorTable
-            .ensureFieldAccessorsInitialized(
-                com.google.monitoring.v3.AlertPolicy.AlertStrategy.class,
-                com.google.monitoring.v3.AlertPolicy.AlertStrategy.Builder.class);
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        if (extensionRegistry == null) {
+          throw new java.lang.NullPointerException();
+        }
+        try {
+          boolean done = false;
+          while (!done) {
+            int tag = input.readTag();
+            switch (tag) {
+              case 0:
+                done = true;
+                break;
+              case 10:
+                {
+                  input.readMessage(
+                      getNotificationRateLimitFieldBuilder().getBuilder(), extensionRegistry);
+                  bitField0_ |= 0x00000001;
+                  break;
+                } // case 10
+              case 26:
+                {
+                  input.readMessage(getAutoCloseFieldBuilder().getBuilder(), extensionRegistry);
+                  bitField0_ |= 0x00000002;
+                  break;
+                } // case 26
+              case 34:
+                {
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy m =
+                      input.readMessage(
+                          com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                              .NotificationChannelStrategy.parser(),
+                          extensionRegistry);
+                  if (notificationChannelStrategyBuilder_ == null) {
+                    ensureNotificationChannelStrategyIsMutable();
+                    notificationChannelStrategy_.add(m);
+                  } else {
+                    notificationChannelStrategyBuilder_.addMessage(m);
+                  }
+                  break;
+                } // case 34
+              default:
+                {
+                  if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                    done = true; // was an endgroup tag
+                  }
+                  break;
+                } // default:
+            } // switch (tag)
+          } // while (!done)
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          throw e.unwrapIOException();
+        } finally {
+          onChanged();
+        } // finally
+        return this;
       }
 
-      // Construct using com.google.monitoring.v3.AlertPolicy.AlertStrategy.newBuilder()
-      private Builder() {}
+      private int bitField0_;
 
-      private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
-        super(parent);
+      private com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          notificationRateLimit_;
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder>
+          notificationRateLimitBuilder_;
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       *
+       * @return Whether the notificationRateLimit field is set.
+       */
+      public boolean hasNotificationRateLimit() {
+        return ((bitField0_ & 0x00000001) != 0);
+      }
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       *
+       * @return The notificationRateLimit.
+       */
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+          getNotificationRateLimit() {
+        if (notificationRateLimitBuilder_ == null) {
+          return notificationRateLimit_ == null
+              ? com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+                  .getDefaultInstance()
+              : notificationRateLimit_;
+        } else {
+          return notificationRateLimitBuilder_.getMessage();
+        }
+      }
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      public Builder setNotificationRateLimit(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit value) {
+        if (notificationRateLimitBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          notificationRateLimit_ = value;
+        } else {
+          notificationRateLimitBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      public Builder setNotificationRateLimit(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
+              builderForValue) {
+        if (notificationRateLimitBuilder_ == null) {
+          notificationRateLimit_ = builderForValue.build();
+        } else {
+          notificationRateLimitBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      public Builder mergeNotificationRateLimit(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit value) {
+        if (notificationRateLimitBuilder_ == null) {
+          if (((bitField0_ & 0x00000001) != 0)
+              && notificationRateLimit_ != null
+              && notificationRateLimit_
+                  != com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+                      .getDefaultInstance()) {
+            getNotificationRateLimitBuilder().mergeFrom(value);
+          } else {
+            notificationRateLimit_ = value;
+          }
+        } else {
+          notificationRateLimitBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return this;
       }
-
-      @java.lang.Override
-      public Builder clear() {
-        super.clear();
-        bitField0_ = 0;
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      public Builder clearNotificationRateLimit() {
+        bitField0_ = (bitField0_ & ~0x00000001);
         notificationRateLimit_ = null;
         if (notificationRateLimitBuilder_ != null) {
           notificationRateLimitBuilder_.dispose();
           notificationRateLimitBuilder_ = null;
         }
-        autoClose_ = null;
-        if (autoCloseBuilder_ != null) {
-          autoCloseBuilder_.dispose();
-          autoCloseBuilder_ = null;
-        }
+        onChanged();
         return this;
       }
-
-      @java.lang.Override
-      public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
-        return com.google.monitoring.v3.AlertProto
-            .internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor;
-      }
-
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy getDefaultInstanceForType() {
-        return com.google.monitoring.v3.AlertPolicy.AlertStrategy.getDefaultInstance();
-      }
-
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy build() {
-        com.google.monitoring.v3.AlertPolicy.AlertStrategy result = buildPartial();
-        if (!result.isInitialized()) {
-          throw newUninitializedMessageException(result);
-        }
-        return result;
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
+          getNotificationRateLimitBuilder() {
+        bitField0_ |= 0x00000001;
+        onChanged();
+        return getNotificationRateLimitFieldBuilder().getBuilder();
       }
-
-      @java.lang.Override
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy buildPartial() {
-        com.google.monitoring.v3.AlertPolicy.AlertStrategy result =
-            new com.google.monitoring.v3.AlertPolicy.AlertStrategy(this);
-        if (bitField0_ != 0) {
-          buildPartial0(result);
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder
+          getNotificationRateLimitOrBuilder() {
+        if (notificationRateLimitBuilder_ != null) {
+          return notificationRateLimitBuilder_.getMessageOrBuilder();
+        } else {
+          return notificationRateLimit_ == null
+              ? com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
+                  .getDefaultInstance()
+              : notificationRateLimit_;
         }
-        onBuilt();
-        return result;
       }
-
-      private void buildPartial0(com.google.monitoring.v3.AlertPolicy.AlertStrategy result) {
-        int from_bitField0_ = bitField0_;
-        if (((from_bitField0_ & 0x00000001) != 0)) {
-          result.notificationRateLimit_ =
-              notificationRateLimitBuilder_ == null
-                  ? notificationRateLimit_
-                  : notificationRateLimitBuilder_.build();
-        }
-        if (((from_bitField0_ & 0x00000002) != 0)) {
-          result.autoClose_ = autoCloseBuilder_ == null ? autoClose_ : autoCloseBuilder_.build();
+      /**
+       *
+       *
+       * 
+       * Required for alert policies with a `LogMatch` condition.
+       *
+       * This limit is not implemented for alert policies that are not log-based.
+       * 

+       *
+       * 
+       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * 
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder>
+          getNotificationRateLimitFieldBuilder() {
+        if (notificationRateLimitBuilder_ == null) {
+          notificationRateLimitBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit,
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder,
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                      .NotificationRateLimitOrBuilder>(
+                  getNotificationRateLimit(), getParentForChildren(), isClean());
+          notificationRateLimit_ = null;
         }
+        return notificationRateLimitBuilder_;
       }
 
-      @java.lang.Override
-      public Builder clone() {
-        return super.clone();
-      }
-
-      @java.lang.Override
-      public Builder setField(
-          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-        return super.setField(field, value);
-      }
-
-      @java.lang.Override
-      public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-        return super.clearField(field);
-      }
-
-      @java.lang.Override
-      public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-        return super.clearOneof(oneof);
+      private com.google.protobuf.Duration autoClose_;
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.protobuf.Duration,
+              com.google.protobuf.Duration.Builder,
+              com.google.protobuf.DurationOrBuilder>
+          autoCloseBuilder_;
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       *
+       * @return Whether the autoClose field is set.
+       */
+      public boolean hasAutoClose() {
+        return ((bitField0_ & 0x00000002) != 0);
       }
-
-      @java.lang.Override
-      public Builder setRepeatedField(
-          com.google.protobuf.Descriptors.FieldDescriptor field,
-          int index,
-          java.lang.Object value) {
-        return super.setRepeatedField(field, index, value);
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       *
+       * @return The autoClose.
+       */
+      public com.google.protobuf.Duration getAutoClose() {
+        if (autoCloseBuilder_ == null) {
+          return autoClose_ == null
+              ? com.google.protobuf.Duration.getDefaultInstance()
+              : autoClose_;
+        } else {
+          return autoCloseBuilder_.getMessage();
+        }
       }
-
-      @java.lang.Override
-      public Builder addRepeatedField(
-          com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-        return super.addRepeatedField(field, value);
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      public Builder setAutoClose(com.google.protobuf.Duration value) {
+        if (autoCloseBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          autoClose_ = value;
+        } else {
+          autoCloseBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return this;
       }
-
-      @java.lang.Override
-      public Builder mergeFrom(com.google.protobuf.Message other) {
-        if (other instanceof com.google.monitoring.v3.AlertPolicy.AlertStrategy) {
-          return mergeFrom((com.google.monitoring.v3.AlertPolicy.AlertStrategy) other);
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      public Builder setAutoClose(com.google.protobuf.Duration.Builder builderForValue) {
+        if (autoCloseBuilder_ == null) {
+          autoClose_ = builderForValue.build();
         } else {
-          super.mergeFrom(other);
-          return this;
+          autoCloseBuilder_.setMessage(builderForValue.build());
         }
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return this;
       }
-
-      public Builder mergeFrom(com.google.monitoring.v3.AlertPolicy.AlertStrategy other) {
-        if (other == com.google.monitoring.v3.AlertPolicy.AlertStrategy.getDefaultInstance())
-          return this;
-        if (other.hasNotificationRateLimit()) {
-          mergeNotificationRateLimit(other.getNotificationRateLimit());
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      public Builder mergeAutoClose(com.google.protobuf.Duration value) {
+        if (autoCloseBuilder_ == null) {
+          if (((bitField0_ & 0x00000002) != 0)
+              && autoClose_ != null
+              && autoClose_ != com.google.protobuf.Duration.getDefaultInstance()) {
+            getAutoCloseBuilder().mergeFrom(value);
+          } else {
+            autoClose_ = value;
+          }
+        } else {
+          autoCloseBuilder_.mergeFrom(value);
         }
-        if (other.hasAutoClose()) {
-          mergeAutoClose(other.getAutoClose());
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return this;
+      }
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      public Builder clearAutoClose() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        autoClose_ = null;
+        if (autoCloseBuilder_ != null) {
+          autoCloseBuilder_.dispose();
+          autoCloseBuilder_ = null;
         }
-        this.mergeUnknownFields(other.getUnknownFields());
         onChanged();
         return this;
       }
-
-      @java.lang.Override
-      public final boolean isInitialized() {
-        return true;
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      public com.google.protobuf.Duration.Builder getAutoCloseBuilder() {
+        bitField0_ |= 0x00000002;
+        onChanged();
+        return getAutoCloseFieldBuilder().getBuilder();
+      }
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      public com.google.protobuf.DurationOrBuilder getAutoCloseOrBuilder() {
+        if (autoCloseBuilder_ != null) {
+          return autoCloseBuilder_.getMessageOrBuilder();
+        } else {
+          return autoClose_ == null
+              ? com.google.protobuf.Duration.getDefaultInstance()
+              : autoClose_;
+        }
+      }
+      /**
+       *
+       *
+       * 
+       * If an alert policy that was active has no data for this long, any open
+       * incidents will close
+       * 

+       *
+       * .google.protobuf.Duration auto_close = 3;
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+              com.google.protobuf.Duration,
+              com.google.protobuf.Duration.Builder,
+              com.google.protobuf.DurationOrBuilder>
+          getAutoCloseFieldBuilder() {
+        if (autoCloseBuilder_ == null) {
+          autoCloseBuilder_ =
+              new com.google.protobuf.SingleFieldBuilderV3<
+                  com.google.protobuf.Duration,
+                  com.google.protobuf.Duration.Builder,
+                  com.google.protobuf.DurationOrBuilder>(
+                  getAutoClose(), getParentForChildren(), isClean());
+          autoClose_ = null;
+        }
+        return autoCloseBuilder_;
       }
 
-      @java.lang.Override
-      public Builder mergeFrom(
-          com.google.protobuf.CodedInputStream input,
-          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
-          throws java.io.IOException {
-        if (extensionRegistry == null) {
-          throw new java.lang.NullPointerException();
+      private java.util.List<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy>
+          notificationChannelStrategy_ = java.util.Collections.emptyList();
+
+      private void ensureNotificationChannelStrategyIsMutable() {
+        if (!((bitField0_ & 0x00000004) != 0)) {
+          notificationChannelStrategy_ =
+              new java.util.ArrayList<
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy>(
+                  notificationChannelStrategy_);
+          bitField0_ |= 0x00000004;
         }
-        try {
-          boolean done = false;
-          while (!done) {
-            int tag = input.readTag();
-            switch (tag) {
-              case 0:
-                done = true;
-                break;
-              case 10:
-                {
-                  input.readMessage(
-                      getNotificationRateLimitFieldBuilder().getBuilder(), extensionRegistry);
-                  bitField0_ |= 0x00000001;
-                  break;
-                } // case 10
-              case 26:
-                {
-                  input.readMessage(getAutoCloseFieldBuilder().getBuilder(), extensionRegistry);
-                  bitField0_ |= 0x00000002;
-                  break;
-                } // case 26
-              default:
-                {
-                  if (!super.parseUnknownField(input, extensionRegistry, tag)) {
-                    done = true; // was an endgroup tag
-                  }
-                  break;
-                } // default:
-            } // switch (tag)
-          } // while (!done)
-        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-          throw e.unwrapIOException();
-        } finally {
-          onChanged();
-        } // finally
-        return this;
       }
 
-      private int bitField0_;
+      private com.google.protobuf.RepeatedFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                  .Builder,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                  .NotificationChannelStrategyOrBuilder>
+          notificationChannelStrategyBuilder_;
 
-      private com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
-          notificationRateLimit_;
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit,
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder,
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder>
-          notificationRateLimitBuilder_;
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
-       *
-       * @return Whether the notificationRateLimit field is set.
        */
-      public boolean hasNotificationRateLimit() {
-        return ((bitField0_ & 0x00000001) != 0);
+      public java.util.List<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy>
+          getNotificationChannelStrategyList() {
+        if (notificationChannelStrategyBuilder_ == null) {
+          return java.util.Collections.unmodifiableList(notificationChannelStrategy_);
+        } else {
+          return notificationChannelStrategyBuilder_.getMessageList();
+        }
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
-       *
-       * @return The notificationRateLimit.
        */
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
-          getNotificationRateLimit() {
-        if (notificationRateLimitBuilder_ == null) {
-          return notificationRateLimit_ == null
-              ? com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
-                  .getDefaultInstance()
-              : notificationRateLimit_;
+      public int getNotificationChannelStrategyCount() {
+        if (notificationChannelStrategyBuilder_ == null) {
+          return notificationChannelStrategy_.size();
         } else {
-          return notificationRateLimitBuilder_.getMessage();
+          return notificationChannelStrategyBuilder_.getCount();
         }
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      public Builder setNotificationRateLimit(
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit value) {
-        if (notificationRateLimitBuilder_ == null) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          notificationRateLimit_ = value;
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+          getNotificationChannelStrategy(int index) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          return notificationChannelStrategy_.get(index);
         } else {
-          notificationRateLimitBuilder_.setMessage(value);
+          return notificationChannelStrategyBuilder_.getMessage(index);
         }
-        bitField0_ |= 0x00000001;
-        onChanged();
-        return this;
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      public Builder setNotificationRateLimit(
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
-              builderForValue) {
-        if (notificationRateLimitBuilder_ == null) {
-          notificationRateLimit_ = builderForValue.build();
+      public Builder setNotificationChannelStrategy(
+          int index,
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy value) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.set(index, value);
+          onChanged();
         } else {
-          notificationRateLimitBuilder_.setMessage(builderForValue.build());
+          notificationChannelStrategyBuilder_.setMessage(index, value);
         }
-        bitField0_ |= 0x00000001;
-        onChanged();
         return this;
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      public Builder mergeNotificationRateLimit(
-          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit value) {
-        if (notificationRateLimitBuilder_ == null) {
-          if (((bitField0_ & 0x00000001) != 0)
-              && notificationRateLimit_ != null
-              && notificationRateLimit_
-                  != com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
-                      .getDefaultInstance()) {
-            getNotificationRateLimitBuilder().mergeFrom(value);
-          } else {
-            notificationRateLimit_ = value;
-          }
+      public Builder setNotificationChannelStrategy(
+          int index,
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.Builder
+              builderForValue) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.set(index, builderForValue.build());
+          onChanged();
         } else {
-          notificationRateLimitBuilder_.mergeFrom(value);
+          notificationChannelStrategyBuilder_.setMessage(index, builderForValue.build());
         }
-        bitField0_ |= 0x00000001;
-        onChanged();
         return this;
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      public Builder clearNotificationRateLimit() {
-        bitField0_ = (bitField0_ & ~0x00000001);
-        notificationRateLimit_ = null;
-        if (notificationRateLimitBuilder_ != null) {
-          notificationRateLimitBuilder_.dispose();
-          notificationRateLimitBuilder_ = null;
+      public Builder addNotificationChannelStrategy(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy value) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.add(value);
+          onChanged();
+        } else {
+          notificationChannelStrategyBuilder_.addMessage(value);
         }
-        onChanged();
         return this;
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder
-          getNotificationRateLimitBuilder() {
-        bitField0_ |= 0x00000001;
-        onChanged();
-        return getNotificationRateLimitFieldBuilder().getBuilder();
+      public Builder addNotificationChannelStrategy(
+          int index,
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy value) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.add(index, value);
+          onChanged();
+        } else {
+          notificationChannelStrategyBuilder_.addMessage(index, value);
+        }
+        return this;
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder
-          getNotificationRateLimitOrBuilder() {
-        if (notificationRateLimitBuilder_ != null) {
-          return notificationRateLimitBuilder_.getMessageOrBuilder();
+      public Builder addNotificationChannelStrategy(
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.Builder
+              builderForValue) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.add(builderForValue.build());
+          onChanged();
         } else {
-          return notificationRateLimit_ == null
-              ? com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit
-                  .getDefaultInstance()
-              : notificationRateLimit_;
+          notificationChannelStrategyBuilder_.addMessage(builderForValue.build());
         }
+        return this;
       }
       /**
        *
        *
        * 
-       * Required for alert policies with a `LogMatch` condition.
-       *
-       * This limit is not implemented for alert policies that are not log-based.
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
        * 
-       * .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit notification_rate_limit = 1;
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
        * 
        */
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit,
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder,
-              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimitOrBuilder>
-          getNotificationRateLimitFieldBuilder() {
-        if (notificationRateLimitBuilder_ == null) {
-          notificationRateLimitBuilder_ =
-              new com.google.protobuf.SingleFieldBuilderV3<
-                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit,
-                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationRateLimit.Builder,
-                  com.google.monitoring.v3.AlertPolicy.AlertStrategy
-                      .NotificationRateLimitOrBuilder>(
-                  getNotificationRateLimit(), getParentForChildren(), isClean());
-          notificationRateLimit_ = null;
+      public Builder addNotificationChannelStrategy(
+          int index,
+          com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.Builder
+              builderForValue) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.add(index, builderForValue.build());
+          onChanged();
+        } else {
+          notificationChannelStrategyBuilder_.addMessage(index, builderForValue.build());
         }
-        return notificationRateLimitBuilder_;
+        return this;
       }
-
-      private com.google.protobuf.Duration autoClose_;
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.protobuf.Duration,
-              com.google.protobuf.Duration.Builder,
-              com.google.protobuf.DurationOrBuilder>
-          autoCloseBuilder_;
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
-       *
-       * @return Whether the autoClose field is set.
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public boolean hasAutoClose() {
-        return ((bitField0_ & 0x00000002) != 0);
+      public Builder addAllNotificationChannelStrategy(
+          java.lang.Iterable<
+                  ? extends
+                      com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                          .NotificationChannelStrategy>
+              values) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          ensureNotificationChannelStrategyIsMutable();
+          com.google.protobuf.AbstractMessageLite.Builder.addAll(
+              values, notificationChannelStrategy_);
+          onChanged();
+        } else {
+          notificationChannelStrategyBuilder_.addAllMessages(values);
+        }
+        return this;
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
-       *
-       * @return The autoClose.
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public com.google.protobuf.Duration getAutoClose() {
-        if (autoCloseBuilder_ == null) {
-          return autoClose_ == null
-              ? com.google.protobuf.Duration.getDefaultInstance()
-              : autoClose_;
+      public Builder clearNotificationChannelStrategy() {
+        if (notificationChannelStrategyBuilder_ == null) {
+          notificationChannelStrategy_ = java.util.Collections.emptyList();
+          bitField0_ = (bitField0_ & ~0x00000004);
+          onChanged();
         } else {
-          return autoCloseBuilder_.getMessage();
+          notificationChannelStrategyBuilder_.clear();
         }
+        return this;
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public Builder setAutoClose(com.google.protobuf.Duration value) {
-        if (autoCloseBuilder_ == null) {
-          if (value == null) {
-            throw new NullPointerException();
-          }
-          autoClose_ = value;
+      public Builder removeNotificationChannelStrategy(int index) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          ensureNotificationChannelStrategyIsMutable();
+          notificationChannelStrategy_.remove(index);
+          onChanged();
         } else {
-          autoCloseBuilder_.setMessage(value);
+          notificationChannelStrategyBuilder_.remove(index);
         }
-        bitField0_ |= 0x00000002;
-        onChanged();
         return this;
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public Builder setAutoClose(com.google.protobuf.Duration.Builder builderForValue) {
-        if (autoCloseBuilder_ == null) {
-          autoClose_ = builderForValue.build();
-        } else {
-          autoCloseBuilder_.setMessage(builderForValue.build());
-        }
-        bitField0_ |= 0x00000002;
-        onChanged();
-        return this;
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.Builder
+          getNotificationChannelStrategyBuilder(int index) {
+        return getNotificationChannelStrategyFieldBuilder().getBuilder(index);
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public Builder mergeAutoClose(com.google.protobuf.Duration value) {
-        if (autoCloseBuilder_ == null) {
-          if (((bitField0_ & 0x00000002) != 0)
-              && autoClose_ != null
-              && autoClose_ != com.google.protobuf.Duration.getDefaultInstance()) {
-            getAutoCloseBuilder().mergeFrom(value);
-          } else {
-            autoClose_ = value;
-          }
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategyOrBuilder
+          getNotificationChannelStrategyOrBuilder(int index) {
+        if (notificationChannelStrategyBuilder_ == null) {
+          return notificationChannelStrategy_.get(index);
         } else {
-          autoCloseBuilder_.mergeFrom(value);
+          return notificationChannelStrategyBuilder_.getMessageOrBuilder(index);
         }
-        bitField0_ |= 0x00000002;
-        onChanged();
-        return this;
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public Builder clearAutoClose() {
-        bitField0_ = (bitField0_ & ~0x00000002);
-        autoClose_ = null;
-        if (autoCloseBuilder_ != null) {
-          autoCloseBuilder_.dispose();
-          autoCloseBuilder_ = null;
+      public java.util.List<
+              ? extends
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                      .NotificationChannelStrategyOrBuilder>
+          getNotificationChannelStrategyOrBuilderList() {
+        if (notificationChannelStrategyBuilder_ != null) {
+          return notificationChannelStrategyBuilder_.getMessageOrBuilderList();
+        } else {
+          return java.util.Collections.unmodifiableList(notificationChannelStrategy_);
         }
-        onChanged();
-        return this;
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public com.google.protobuf.Duration.Builder getAutoCloseBuilder() {
-        bitField0_ |= 0x00000002;
-        onChanged();
-        return getAutoCloseFieldBuilder().getBuilder();
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.Builder
+          addNotificationChannelStrategyBuilder() {
+        return getNotificationChannelStrategyFieldBuilder()
+            .addBuilder(
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                    .getDefaultInstance());
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      public com.google.protobuf.DurationOrBuilder getAutoCloseOrBuilder() {
-        if (autoCloseBuilder_ != null) {
-          return autoCloseBuilder_.getMessageOrBuilder();
-        } else {
-          return autoClose_ == null
-              ? com.google.protobuf.Duration.getDefaultInstance()
-              : autoClose_;
-        }
+      public com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy.Builder
+          addNotificationChannelStrategyBuilder(int index) {
+        return getNotificationChannelStrategyFieldBuilder()
+            .addBuilder(
+                index,
+                com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                    .getDefaultInstance());
       }
       /**
        *
        *
        * 
-       * If an alert policy that was active has no data for this long, any open
-       * incidents will close
+       * Control how notifications will be sent out, on a per-channel basis.
        * 

        *
-       * .google.protobuf.Duration auto_close = 3;
+       * 
+       * repeated .google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy notification_channel_strategy = 4;
+       * 
        */
-      private com.google.protobuf.SingleFieldBuilderV3<
-              com.google.protobuf.Duration,
-              com.google.protobuf.Duration.Builder,
-              com.google.protobuf.DurationOrBuilder>
-          getAutoCloseFieldBuilder() {
-        if (autoCloseBuilder_ == null) {
-          autoCloseBuilder_ =
-              new com.google.protobuf.SingleFieldBuilderV3<
-                  com.google.protobuf.Duration,
-                  com.google.protobuf.Duration.Builder,
-                  com.google.protobuf.DurationOrBuilder>(
-                  getAutoClose(), getParentForChildren(), isClean());
-          autoClose_ = null;
+      public java.util.List<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                  .Builder>
+          getNotificationChannelStrategyBuilderList() {
+        return getNotificationChannelStrategyFieldBuilder().getBuilderList();
+      }
+
+      private com.google.protobuf.RepeatedFieldBuilderV3<
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                  .Builder,
+              com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                  .NotificationChannelStrategyOrBuilder>
+          getNotificationChannelStrategyFieldBuilder() {
+        if (notificationChannelStrategyBuilder_ == null) {
+          notificationChannelStrategyBuilder_ =
+              new com.google.protobuf.RepeatedFieldBuilderV3<
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy,
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy.NotificationChannelStrategy
+                      .Builder,
+                  com.google.monitoring.v3.AlertPolicy.AlertStrategy
+                      .NotificationChannelStrategyOrBuilder>(
+                  notificationChannelStrategy_,
+                  ((bitField0_ & 0x00000004) != 0),
+                  getParentForChildren(),
+                  isClean());
+          notificationChannelStrategy_ = null;
         }
-        return autoCloseBuilder_;
+        return notificationChannelStrategyBuilder_;
       }
 
       @java.lang.Override
@@ -16119,6 +22723,12 @@ public com.google.protobuf.ByteString getNameBytes() {
    * notifications, and incidents. To avoid confusion, don't use the same
    * display name for multiple policies in the same project. The name is
    * limited to 512 Unicode characters.
+   *
+   * The convention for the display_name of a PrometheusQueryLanguageCondition
+   * is "{rule group name}/{alert name}", where the {rule group name} and
+   * {alert name} should be taken from the corresponding Prometheus
+   * configuration file. This convention is not enforced.
+   * In any case the display_name is not a unique key of the AlertPolicy.
    * 

    *
    * string display_name = 2;
@@ -16145,6 +22755,12 @@ public java.lang.String getDisplayName() {
    * notifications, and incidents. To avoid confusion, don't use the same
    * display name for multiple policies in the same project. The name is
    * limited to 512 Unicode characters.
+   *
+   * The convention for the display_name of a PrometheusQueryLanguageCondition
+   * is "{rule group name}/{alert name}", where the {rule group name} and
+   * {alert name} should be taken from the corresponding Prometheus
+   * configuration file. This convention is not enforced.
+   * In any case the display_name is not a unique key of the AlertPolicy.
    * 

    *
    * string display_name = 2;
@@ -16263,6 +22879,13 @@ public int getUserLabelsCount() {
    * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
    * values can contain only lowercase letters, numerals, underscores, and
    * dashes. Keys must begin with a letter.
+   *
+   * Note that Prometheus {alert name} is a
+   * [valid Prometheus label
+   * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+   * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+   * This means that they cannot be stored as-is in user labels, because
+   * they may contain characters that are not allowed in user-label values.
    * 

    *
    * map<string, string> user_labels = 16;
@@ -16291,6 +22914,13 @@ public java.util.Map getUserLabels() {
    * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
    * values can contain only lowercase letters, numerals, underscores, and
    * dashes. Keys must begin with a letter.
+   *
+   * Note that Prometheus {alert name} is a
+   * [valid Prometheus label
+   * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+   * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+   * This means that they cannot be stored as-is in user labels, because
+   * they may contain characters that are not allowed in user-label values.
    * 

    *
    * map<string, string> user_labels = 16;
@@ -16310,6 +22940,13 @@ public java.util.Map getUserLabelsMap() {
    * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
    * values can contain only lowercase letters, numerals, underscores, and
    * dashes. Keys must begin with a letter.
+   *
+   * Note that Prometheus {alert name} is a
+   * [valid Prometheus label
+   * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+   * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+   * This means that they cannot be stored as-is in user labels, because
+   * they may contain characters that are not allowed in user-label values.
    * 

    *
    * map<string, string> user_labels = 16;
@@ -16336,6 +22973,13 @@ public java.util.Map getUserLabelsMap() {
    * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
    * values can contain only lowercase letters, numerals, underscores, and
    * dashes. Keys must begin with a letter.
+   *
+   * Note that Prometheus {alert name} is a
+   * [valid Prometheus label
+   * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+   * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+   * This means that they cannot be stored as-is in user labels, because
+   * they may contain characters that are not allowed in user-label values.
    * 

    *
    * map<string, string> user_labels = 16;
@@ -16366,6 +23010,8 @@ public java.lang.String getUserLabelsOrThrow(java.lang.String key) {
    * conditions.
    * If `condition_time_series_query_language` is present, it must be the only
    * `condition`.
+   * If `condition_monitoring_query_language` is present, it must be the only
+   * `condition`.
    * 

    *
    * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12;
@@ -16384,6 +23030,8 @@ public java.util.List getConditi
    * conditions.
    * If `condition_time_series_query_language` is present, it must be the only
    * `condition`.
+   * If `condition_monitoring_query_language` is present, it must be the only
+   * `condition`.
    * 

    *
    * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12;
@@ -16403,6 +23051,8 @@ public java.util.List getConditi
    * conditions.
    * If `condition_time_series_query_language` is present, it must be the only
    * `condition`.
+   * If `condition_monitoring_query_language` is present, it must be the only
+   * `condition`.
    * 

    *
    * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12;
@@ -16421,6 +23071,8 @@ public int getConditionsCount() {
    * conditions.
    * If `condition_time_series_query_language` is present, it must be the only
    * `condition`.
+   * If `condition_monitoring_query_language` is present, it must be the only
+   * `condition`.
    * 

    *
    * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12;
@@ -16439,6 +23091,8 @@ public com.google.monitoring.v3.AlertPolicy.Condition getConditions(int index) {
    * conditions.
    * If `condition_time_series_query_language` is present, it must be the only
    * `condition`.
+   * If `condition_monitoring_query_language` is present, it must be the only
+   * `condition`.
    * 

    *
    * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12;
@@ -16555,8 +23209,9 @@ public com.google.protobuf.BoolValueOrBuilder getEnabledOrBuilder() {
    *
    *
    * 
-   * Read-only description of how the alert policy is invalid. OK if the alert
-   * policy is valid. If not OK, the alert policy will not generate incidents.
+   * Read-only description of how the alert policy is invalid. This field is
+   * only set when the alert policy is invalid. An invalid alert policy will not
+   * generate incidents.
    * 

    *
    * .google.rpc.Status validity = 18;
@@ -16571,8 +23226,9 @@ public boolean hasValidity() {
    *
    *
    * 
-   * Read-only description of how the alert policy is invalid. OK if the alert
-   * policy is valid. If not OK, the alert policy will not generate incidents.
+   * Read-only description of how the alert policy is invalid. This field is
+   * only set when the alert policy is invalid. An invalid alert policy will not
+   * generate incidents.
    * 

    *
    * .google.rpc.Status validity = 18;
@@ -16587,8 +23243,9 @@ public com.google.rpc.Status getValidity() {
    *
    *
    * 
-   * Read-only description of how the alert policy is invalid. OK if the alert
-   * policy is valid. If not OK, the alert policy will not generate incidents.
+   * Read-only description of how the alert policy is invalid. This field is
+   * only set when the alert policy is invalid. An invalid alert policy will not
+   * generate incidents.
    * 

    *
    * .google.rpc.Status validity = 18;
@@ -17761,6 +24418,12 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      * notifications, and incidents. To avoid confusion, don't use the same
      * display name for multiple policies in the same project. The name is
      * limited to 512 Unicode characters.
+     *
+     * The convention for the display_name of a PrometheusQueryLanguageCondition
+     * is "{rule group name}/{alert name}", where the {rule group name} and
+     * {alert name} should be taken from the corresponding Prometheus
+     * configuration file. This convention is not enforced.
+     * In any case the display_name is not a unique key of the AlertPolicy.
      * 

      *
      * string display_name = 2;
@@ -17786,6 +24449,12 @@ public java.lang.String getDisplayName() {
      * notifications, and incidents. To avoid confusion, don't use the same
      * display name for multiple policies in the same project. The name is
      * limited to 512 Unicode characters.
+     *
+     * The convention for the display_name of a PrometheusQueryLanguageCondition
+     * is "{rule group name}/{alert name}", where the {rule group name} and
+     * {alert name} should be taken from the corresponding Prometheus
+     * configuration file. This convention is not enforced.
+     * In any case the display_name is not a unique key of the AlertPolicy.
      * 

      *
      * string display_name = 2;
@@ -17811,6 +24480,12 @@ public com.google.protobuf.ByteString getDisplayNameBytes() {
      * notifications, and incidents. To avoid confusion, don't use the same
      * display name for multiple policies in the same project. The name is
      * limited to 512 Unicode characters.
+     *
+     * The convention for the display_name of a PrometheusQueryLanguageCondition
+     * is "{rule group name}/{alert name}", where the {rule group name} and
+     * {alert name} should be taken from the corresponding Prometheus
+     * configuration file. This convention is not enforced.
+     * In any case the display_name is not a unique key of the AlertPolicy.
      * 

      *
      * string display_name = 2;
@@ -17835,6 +24510,12 @@ public Builder setDisplayName(java.lang.String value) {
      * notifications, and incidents. To avoid confusion, don't use the same
      * display name for multiple policies in the same project. The name is
      * limited to 512 Unicode characters.
+     *
+     * The convention for the display_name of a PrometheusQueryLanguageCondition
+     * is "{rule group name}/{alert name}", where the {rule group name} and
+     * {alert name} should be taken from the corresponding Prometheus
+     * configuration file. This convention is not enforced.
+     * In any case the display_name is not a unique key of the AlertPolicy.
      * 

      *
      * string display_name = 2;
@@ -17855,6 +24536,12 @@ public Builder clearDisplayName() {
      * notifications, and incidents. To avoid confusion, don't use the same
      * display name for multiple policies in the same project. The name is
      * limited to 512 Unicode characters.
+     *
+     * The convention for the display_name of a PrometheusQueryLanguageCondition
+     * is "{rule group name}/{alert name}", where the {rule group name} and
+     * {alert name} should be taken from the corresponding Prometheus
+     * configuration file. This convention is not enforced.
+     * In any case the display_name is not a unique key of the AlertPolicy.
      * 

      *
      * string display_name = 2;
@@ -18133,6 +24820,13 @@ public int getUserLabelsCount() {
      * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
      * values can contain only lowercase letters, numerals, underscores, and
      * dashes. Keys must begin with a letter.
+     *
+     * Note that Prometheus {alert name} is a
+     * [valid Prometheus label
+     * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+     * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+     * This means that they cannot be stored as-is in user labels, because
+     * they may contain characters that are not allowed in user-label values.
      * 

      *
      * map<string, string> user_labels = 16;
@@ -18161,6 +24855,13 @@ public java.util.Map getUserLabels() {
      * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
      * values can contain only lowercase letters, numerals, underscores, and
      * dashes. Keys must begin with a letter.
+     *
+     * Note that Prometheus {alert name} is a
+     * [valid Prometheus label
+     * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+     * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+     * This means that they cannot be stored as-is in user labels, because
+     * they may contain characters that are not allowed in user-label values.
      * 

      *
      * map<string, string> user_labels = 16;
@@ -18180,6 +24881,13 @@ public java.util.Map getUserLabelsMap() {
      * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
      * values can contain only lowercase letters, numerals, underscores, and
      * dashes. Keys must begin with a letter.
+     *
+     * Note that Prometheus {alert name} is a
+     * [valid Prometheus label
+     * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+     * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+     * This means that they cannot be stored as-is in user labels, because
+     * they may contain characters that are not allowed in user-label values.
      * 

      *
      * map<string, string> user_labels = 16;
@@ -18206,6 +24914,13 @@ public java.util.Map getUserLabelsMap() {
      * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
      * values can contain only lowercase letters, numerals, underscores, and
      * dashes. Keys must begin with a letter.
+     *
+     * Note that Prometheus {alert name} is a
+     * [valid Prometheus label
+     * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+     * whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+     * This means that they cannot be stored as-is in user labels, because
+     * they may contain characters that are not allowed in user-label values.
      *
* * map<string, string> user_labels = 16; @@ -18238,6 +24953,13 @@ public Builder clearUserLabels() { * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -18266,6 +24988,13 @@ public java.util.Map getMutableUserLabels() * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -18292,6 +25021,13 @@ public Builder putUserLabels(java.lang.String key, java.lang.String value) { * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -18329,6 +25065,8 @@ private void ensureConditionsIsMutable() { * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18350,6 +25088,8 @@ public java.util.List getConditi * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18371,6 +25111,8 @@ public int getConditionsCount() { * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18392,6 +25134,8 @@ public com.google.monitoring.v3.AlertPolicy.Condition getConditions(int index) { * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18419,6 +25163,8 @@ public Builder setConditions(int index, com.google.monitoring.v3.AlertPolicy.Con * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18444,6 +25190,8 @@ public Builder setConditions( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18471,6 +25219,8 @@ public Builder addConditions(com.google.monitoring.v3.AlertPolicy.Condition valu * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18498,6 +25248,8 @@ public Builder addConditions(int index, com.google.monitoring.v3.AlertPolicy.Con * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18523,6 +25275,8 @@ public Builder addConditions( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18548,6 +25302,8 @@ public Builder addConditions( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18573,6 +25329,8 @@ public Builder addAllConditions( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18597,6 +25355,8 @@ public Builder clearConditions() { * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18621,6 +25381,8 @@ public Builder removeConditions(int index) { * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18638,6 +25400,8 @@ public com.google.monitoring.v3.AlertPolicy.Condition.Builder getConditionsBuild * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18660,6 +25424,8 @@ public com.google.monitoring.v3.AlertPolicy.ConditionOrBuilder getConditionsOrBu * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18682,6 +25448,8 @@ public com.google.monitoring.v3.AlertPolicy.ConditionOrBuilder getConditionsOrBu * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18700,6 +25468,8 @@ public com.google.monitoring.v3.AlertPolicy.Condition.Builder addConditionsBuild * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -18718,6 +25488,8 @@ public com.google.monitoring.v3.AlertPolicy.Condition.Builder addConditionsBuild * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -19074,8 +25846,9 @@ public com.google.protobuf.BoolValueOrBuilder getEnabledOrBuilder() { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19089,8 +25862,9 @@ public boolean hasValidity() { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19108,8 +25882,9 @@ public com.google.rpc.Status getValidity() { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19131,8 +25906,9 @@ public Builder setValidity(com.google.rpc.Status value) { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19151,8 +25927,9 @@ public Builder setValidity(com.google.rpc.Status.Builder builderForValue) { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19177,8 +25954,9 @@ public Builder mergeValidity(com.google.rpc.Status value) { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19197,8 +25975,9 @@ public Builder clearValidity() { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19212,8 +25991,9 @@ public com.google.rpc.Status.Builder getValidityBuilder() { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; @@ -19229,8 +26009,9 @@ public com.google.rpc.StatusOrBuilder getValidityOrBuilder() { * * * 
-     * Read-only description of how the alert policy is invalid. OK if the alert
-     * policy is valid. If not OK, the alert policy will not generate incidents.
+     * Read-only description of how the alert policy is invalid. This field is
+     * only set when the alert policy is invalid. An invalid alert policy will not
+     * generate incidents.
      *
* * .google.rpc.Status validity = 18; diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyOrBuilder.java index de3b2ce2b183..5e8a65b28b4f 100644 --- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyOrBuilder.java +++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertPolicyOrBuilder.java @@ -74,6 +74,12 @@ public interface AlertPolicyOrBuilder * notifications, and incidents. To avoid confusion, don't use the same * display name for multiple policies in the same project. The name is * limited to 512 Unicode characters. + * + * The convention for the display_name of a PrometheusQueryLanguageCondition + * is "{rule group name}/{alert name}", where the {rule group name} and + * {alert name} should be taken from the corresponding Prometheus + * configuration file. This convention is not enforced. + * In any case the display_name is not a unique key of the AlertPolicy. * * * string display_name = 2; @@ -89,6 +95,12 @@ public interface AlertPolicyOrBuilder * notifications, and incidents. To avoid confusion, don't use the same * display name for multiple policies in the same project. The name is * limited to 512 Unicode characters. + * + * The convention for the display_name of a PrometheusQueryLanguageCondition + * is "{rule group name}/{alert name}", where the {rule group name} and + * {alert name} should be taken from the corresponding Prometheus + * configuration file. This convention is not enforced. + * In any case the display_name is not a unique key of the AlertPolicy. * * * string display_name = 2; @@ -155,6 +167,13 @@ public interface AlertPolicyOrBuilder * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -171,6 +190,13 @@ public interface AlertPolicyOrBuilder * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -190,6 +216,13 @@ public interface AlertPolicyOrBuilder * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -206,6 +239,13 @@ public interface AlertPolicyOrBuilder * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -226,6 +266,13 @@ java.lang.String getUserLabelsOrDefault( * 63 Unicode characters or 128 bytes, whichever is smaller. Labels and * values can contain only lowercase letters, numerals, underscores, and * dashes. Keys must begin with a letter. + * + * Note that Prometheus {alert name} is a + * [valid Prometheus label + * names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels), + * whereas Prometheus {rule group} is an unrestricted UTF-8 string. + * This means that they cannot be stored as-is in user labels, because + * they may contain characters that are not allowed in user-label values. * * * map<string, string> user_labels = 16; @@ -242,6 +289,8 @@ java.lang.String getUserLabelsOrDefault( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -257,6 +306,8 @@ java.lang.String getUserLabelsOrDefault( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -272,6 +323,8 @@ java.lang.String getUserLabelsOrDefault( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -287,6 +340,8 @@ java.lang.String getUserLabelsOrDefault( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -303,6 +358,8 @@ java.lang.String getUserLabelsOrDefault( * conditions. * If `condition_time_series_query_language` is present, it must be the only * `condition`. + * If `condition_monitoring_query_language` is present, it must be the only + * `condition`. * * * repeated .google.monitoring.v3.AlertPolicy.Condition conditions = 12; @@ -391,8 +448,9 @@ java.lang.String getUserLabelsOrDefault( * * * 
-   * Read-only description of how the alert policy is invalid. OK if the alert
-   * policy is valid. If not OK, the alert policy will not generate incidents.
+   * Read-only description of how the alert policy is invalid. This field is
+   * only set when the alert policy is invalid. An invalid alert policy will not
+   * generate incidents.
    *
* * .google.rpc.Status validity = 18; @@ -404,8 +462,9 @@ java.lang.String getUserLabelsOrDefault( * * * 
-   * Read-only description of how the alert policy is invalid. OK if the alert
-   * policy is valid. If not OK, the alert policy will not generate incidents.
+   * Read-only description of how the alert policy is invalid. This field is
+   * only set when the alert policy is invalid. An invalid alert policy will not
+   * generate incidents.
    *
* * .google.rpc.Status validity = 18; @@ -417,8 +476,9 @@ java.lang.String getUserLabelsOrDefault( * * * 
-   * Read-only description of how the alert policy is invalid. OK if the alert
-   * policy is valid. If not OK, the alert policy will not generate incidents.
+   * Read-only description of how the alert policy is invalid. This field is
+   * only set when the alert policy is invalid. An invalid alert policy will not
+   * generate incidents.
    *
* * .google.rpc.Status validity = 18; diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertProto.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertProto.java index 57c6826a14f7..c0579be51495 100644 --- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertProto.java +++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/AlertProto.java @@ -47,6 +47,10 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_descriptor; static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_fieldAccessorTable; + static final com.google.protobuf.Descriptors.Descriptor + internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_descriptor; + static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable + internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_fieldAccessorTable; static final com.google.protobuf.Descriptors.Descriptor internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor; static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable @@ -63,6 +67,14 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_descriptor; static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable internal_static_google_monitoring_v3_AlertPolicy_Condition_MonitoringQueryLanguageCondition_fieldAccessorTable; + static final com.google.protobuf.Descriptors.Descriptor + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor; + static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_fieldAccessorTable; + static final com.google.protobuf.Descriptors.Descriptor + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_LabelsEntry_descriptor; + static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_LabelsEntry_fieldAccessorTable; static final com.google.protobuf.Descriptors.Descriptor internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor; static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable @@ -71,6 +83,10 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor; static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_fieldAccessorTable; + static final com.google.protobuf.Descriptors.Descriptor + internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_descriptor; + static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable + internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_fieldAccessorTable; static final com.google.protobuf.Descriptors.Descriptor internal_static_google_monitoring_v3_AlertPolicy_UserLabelsEntry_descriptor; static final com.google.protobuf.GeneratedMessageV3.FieldAccessorTable @@ -91,7 +107,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { + "monitoring/v3/mutation_record.proto\032\036goo" + "gle/protobuf/duration.proto\032\036google/prot" + "obuf/wrappers.proto\032\027google/rpc/status.p" - + "roto\"\336\032\n\013AlertPolicy\022\014\n\004name\030\001 \001(\t\022\024\n\014di" + + "roto\"\222\"\n\013AlertPolicy\022\014\n\004name\030\001 \001(\t\022\024\n\014di" + "splay_name\030\002 \001(\t\022F\n\rdocumentation\030\r \001(\0132" + "/.google.monitoring.v3.AlertPolicy.Docum" + "entation\022F\n\013user_labels\030\020 \003(\01321.google.m" @@ -107,81 +123,105 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { + "\017mutation_record\030\013 \001(\0132$.google.monitori" + "ng.v3.MutationRecord\022G\n\016alert_strategy\030\025" + " \001(\0132/.google.monitoring.v3.AlertPolicy." - + "AlertStrategy\0323\n\rDocumentation\022\017\n\007conten" - + "t\030\001 \001(\t\022\021\n\tmime_type\030\002 \001(\t\032\321\020\n\tCondition" - + "\022\014\n\004name\030\014 \001(\t\022\024\n\014display_name\030\006 \001(\t\022Z\n\023" - + "condition_threshold\030\001 \001(\0132;.google.monit" - + "oring.v3.AlertPolicy.Condition.MetricThr" - + "esholdH\000\022U\n\020condition_absent\030\002 \001(\01329.goo" + + "AlertStrategy\032J\n\rDocumentation\022\017\n\007conten" + + "t\030\001 \001(\t\022\021\n\tmime_type\030\002 \001(\t\022\025\n\007subject\030\003 " + + "\001(\tB\004\342A\001\001\032\201\026\n\tCondition\022\014\n\004name\030\014 \001(\t\022\024\n" + + "\014display_name\030\006 \001(\t\022Z\n\023condition_thresho" + + "ld\030\001 \001(\0132;.google.monitoring.v3.AlertPol" + + "icy.Condition.MetricThresholdH\000\022U\n\020condi" + + "tion_absent\030\002 \001(\01329.google.monitoring.v3" + + ".AlertPolicy.Condition.MetricAbsenceH\000\022U" + + "\n\025condition_matched_log\030\024 \001(\01324.google.m" + + "onitoring.v3.AlertPolicy.Condition.LogMa" + + "tchH\000\022{\n#condition_monitoring_query_lang" + + "uage\030\023 \001(\0132L.google.monitoring.v3.AlertP" + + "olicy.Condition.MonitoringQueryLanguageC" + + "onditionH\000\022{\n#condition_prometheus_query" + + "_language\030\025 \001(\0132L.google.monitoring.v3.A" + + "lertPolicy.Condition.PrometheusQueryLang" + + "uageConditionH\000\0325\n\007Trigger\022\017\n\005count\030\001 \001(" + + "\005H\000\022\021\n\007percent\030\002 \001(\001H\000B\006\n\004type\032\240\005\n\017Metri" + + "cThreshold\022\024\n\006filter\030\002 \001(\tB\004\342A\001\002\0227\n\014aggr" + + "egations\030\010 \003(\0132!.google.monitoring.v3.Ag" + + "gregation\022\032\n\022denominator_filter\030\t \001(\t\022C\n" + + "\030denominator_aggregations\030\n \003(\0132!.google" + + ".monitoring.v3.Aggregation\022e\n\020forecast_o" + + "ptions\030\014 \001(\0132K.google.monitoring.v3.Aler" + + "tPolicy.Condition.MetricThreshold.Foreca" + + "stOptions\0228\n\ncomparison\030\004 \001(\0162$.google.m" + + "onitoring.v3.ComparisonType\022\027\n\017threshold" + + "_value\030\005 \001(\001\022+\n\010duration\030\006 \001(\0132\031.google." + + "protobuf.Duration\022D\n\007trigger\030\007 \001(\01323.goo" + "gle.monitoring.v3.AlertPolicy.Condition." - + "MetricAbsenceH\000\022U\n\025condition_matched_log" - + "\030\024 \001(\01324.google.monitoring.v3.AlertPolic" - + "y.Condition.LogMatchH\000\022{\n#condition_moni" - + "toring_query_language\030\023 \001(\0132L.google.mon" - + "itoring.v3.AlertPolicy.Condition.Monitor" - + "ingQueryLanguageConditionH\000\0325\n\007Trigger\022\017" - + "\n\005count\030\001 \001(\005H\000\022\021\n\007percent\030\002 \001(\001H\000B\006\n\004ty" - + "pe\032\353\003\n\017MetricThreshold\022\024\n\006filter\030\002 \001(\tB\004" - + "\342A\001\002\0227\n\014aggregations\030\010 \003(\0132!.google.moni" - + "toring.v3.Aggregation\022\032\n\022denominator_fil" - + "ter\030\t \001(\t\022C\n\030denominator_aggregations\030\n " - + "\003(\0132!.google.monitoring.v3.Aggregation\0228" - + "\n\ncomparison\030\004 \001(\0162$.google.monitoring.v" - + "3.ComparisonType\022\027\n\017threshold_value\030\005 \001(" - + "\001\022+\n\010duration\030\006 \001(\0132\031.google.protobuf.Du" - + "ration\022D\n\007trigger\030\007 \001(\01323.google.monitor" + + "Trigger\022b\n\027evaluation_missing_data\030\013 \001(\016" + + "2A.google.monitoring.v3.AlertPolicy.Cond" + + "ition.EvaluationMissingData\032L\n\017ForecastO" + + "ptions\0229\n\020forecast_horizon\030\001 \001(\0132\031.googl" + + "e.protobuf.DurationB\004\342A\001\002\032\321\001\n\rMetricAbse" + + "nce\022\024\n\006filter\030\001 \001(\tB\004\342A\001\002\0227\n\014aggregation" + + "s\030\005 \003(\0132!.google.monitoring.v3.Aggregati" + + "on\022+\n\010duration\030\002 \001(\0132\031.google.protobuf.D" + + "uration\022D\n\007trigger\030\003 \001(\01323.google.monito" + + "ring.v3.AlertPolicy.Condition.Trigger\032\275\001" + + "\n\010LogMatch\022\024\n\006filter\030\001 \001(\tB\004\342A\001\002\022c\n\020labe" + + "l_extractors\030\002 \003(\0132I.google.monitoring.v" + + "3.AlertPolicy.Condition.LogMatch.LabelEx" + + "tractorsEntry\0326\n\024LabelExtractorsEntry\022\013\n" + + "\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\032\210\002\n Monito" + + "ringQueryLanguageCondition\022\r\n\005query\030\001 \001(" + + "\t\022+\n\010duration\030\002 \001(\0132\031.google.protobuf.Du" + + "ration\022D\n\007trigger\030\003 \001(\01323.google.monitor" + "ing.v3.AlertPolicy.Condition.Trigger\022b\n\027" - + "evaluation_missing_data\030\013 \001(\0162A.google.m" + + "evaluation_missing_data\030\004 \001(\0162A.google.m" + "onitoring.v3.AlertPolicy.Condition.Evalu" - + "ationMissingData\032\321\001\n\rMetricAbsence\022\024\n\006fi" - + "lter\030\001 \001(\tB\004\342A\001\002\0227\n\014aggregations\030\005 \003(\0132!" - + ".google.monitoring.v3.Aggregation\022+\n\010dur" - + "ation\030\002 \001(\0132\031.google.protobuf.Duration\022D" - + "\n\007trigger\030\003 \001(\01323.google.monitoring.v3.A" - + "lertPolicy.Condition.Trigger\032\275\001\n\010LogMatc" - + "h\022\024\n\006filter\030\001 \001(\tB\004\342A\001\002\022c\n\020label_extract" - + "ors\030\002 \003(\0132I.google.monitoring.v3.AlertPo" - + "licy.Condition.LogMatch.LabelExtractorsE" - + "ntry\0326\n\024LabelExtractorsEntry\022\013\n\003key\030\001 \001(" - + "\t\022\r\n\005value\030\002 \001(\t:\0028\001\032\210\002\n MonitoringQuery" - + "LanguageCondition\022\r\n\005query\030\001 \001(\t\022+\n\010dura" - + "tion\030\002 \001(\0132\031.google.protobuf.Duration\022D\n" - + "\007trigger\030\003 \001(\01323.google.monitoring.v3.Al" - + "ertPolicy.Condition.Trigger\022b\n\027evaluatio" - + "n_missing_data\030\004 \001(\0162A.google.monitoring" - + ".v3.AlertPolicy.Condition.EvaluationMiss" - + "ingData\"\255\001\n\025EvaluationMissingData\022\'\n#EVA" - + "LUATION_MISSING_DATA_UNSPECIFIED\020\000\022$\n EV" - + "ALUATION_MISSING_DATA_INACTIVE\020\001\022\"\n\036EVAL" - + "UATION_MISSING_DATA_ACTIVE\020\002\022!\n\035EVALUATI" - + "ON_MISSING_DATA_NO_OP\020\003:\227\002\352A\223\002\n.monitori" - + "ng.googleapis.com/AlertPolicyCondition\022F" - + "projects/{project}/alertPolicies/{alert_" - + "policy}/conditions/{condition}\022Porganiza" - + "tions/{organization}/alertPolicies/{aler" - + "t_policy}/conditions/{condition}\022Dfolder" - + "s/{folder}/alertPolicies/{alert_policy}/" - + "conditions/{condition}\022\001*B\013\n\tcondition\032\352" - + "\001\n\rAlertStrategy\022f\n\027notification_rate_li" - + "mit\030\001 \001(\0132E.google.monitoring.v3.AlertPo" - + "licy.AlertStrategy.NotificationRateLimit" - + "\022-\n\nauto_close\030\003 \001(\0132\031.google.protobuf.D" - + "uration\032B\n\025NotificationRateLimit\022)\n\006peri" - + "od\030\001 \001(\0132\031.google.protobuf.Duration\0321\n\017U" - + "serLabelsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001" - + "(\t:\0028\001\"a\n\025ConditionCombinerType\022\027\n\023COMBI" - + "NE_UNSPECIFIED\020\000\022\007\n\003AND\020\001\022\006\n\002OR\020\002\022\036\n\032AND" - + "_WITH_MATCHING_RESOURCE\020\003:\311\001\352A\305\001\n%monito" - + "ring.googleapis.com/AlertPolicy\022/project" - + "s/{project}/alertPolicies/{alert_policy}" - + "\0229organizations/{organization}/alertPoli" - + "cies/{alert_policy}\022-folders/{folder}/al" - + "ertPolicies/{alert_policy}\022\001*B\305\001\n\030com.go" - + "ogle.monitoring.v3B\nAlertProtoP\001ZAcloud." - + "google.com/go/monitoring/apiv3/v2/monito" - + "ringpb;monitoringpb\252\002\032Google.Cloud.Monit" - + "oring.V3\312\002\032Google\\Cloud\\Monitoring\\V3\352\002\035" - + "Google::Cloud::Monitoring::V3b\006proto3" + + "ationMissingData\032\373\002\n PrometheusQueryLang" + + "uageCondition\022\023\n\005query\030\001 \001(\tB\004\342A\001\002\0221\n\010du" + + "ration\030\002 \001(\0132\031.google.protobuf.DurationB" + + "\004\342A\001\001\022<\n\023evaluation_interval\030\003 \001(\0132\031.goo" + + "gle.protobuf.DurationB\004\342A\001\001\022n\n\006labels\030\004 " + + "\003(\0132X.google.monitoring.v3.AlertPolicy.C" + + "ondition.PrometheusQueryLanguageConditio" + + "n.LabelsEntryB\004\342A\001\001\022\030\n\nrule_group\030\005 \001(\tB" + + "\004\342A\001\001\022\030\n\nalert_rule\030\006 \001(\tB\004\342A\001\001\032-\n\013Label" + + "sEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"\255" + + "\001\n\025EvaluationMissingData\022\'\n#EVALUATION_M" + + "ISSING_DATA_UNSPECIFIED\020\000\022$\n EVALUATION_" + + "MISSING_DATA_INACTIVE\020\001\022\"\n\036EVALUATION_MI" + + "SSING_DATA_ACTIVE\020\002\022!\n\035EVALUATION_MISSIN" + + "G_DATA_NO_OP\020\003:\227\002\352A\223\002\n.monitoring.google" + + "apis.com/AlertPolicyCondition\022Fprojects/" + + "{project}/alertPolicies/{alert_policy}/c" + + "onditions/{condition}\022Porganizations/{or" + + "ganization}/alertPolicies/{alert_policy}" + + "/conditions/{condition}\022Dfolders/{folder" + + "}/alertPolicies/{alert_policy}/condition" + + "s/{condition}\022\001*B\013\n\tcondition\032\327\003\n\rAlertS" + + "trategy\022f\n\027notification_rate_limit\030\001 \001(\013" + + "2E.google.monitoring.v3.AlertPolicy.Aler" + + "tStrategy.NotificationRateLimit\022-\n\nauto_" + + "close\030\003 \001(\0132\031.google.protobuf.Duration\022r" + + "\n\035notification_channel_strategy\030\004 \003(\0132K." + + "google.monitoring.v3.AlertPolicy.AlertSt" + + "rategy.NotificationChannelStrategy\032B\n\025No" + + "tificationRateLimit\022)\n\006period\030\001 \001(\0132\031.go" + + "ogle.protobuf.Duration\032w\n\033NotificationCh" + + "annelStrategy\022\"\n\032notification_channel_na" + + "mes\030\001 \003(\t\0224\n\021renotify_interval\030\002 \001(\0132\031.g" + + "oogle.protobuf.Duration\0321\n\017UserLabelsEnt" + + "ry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"a\n\025Co" + + "nditionCombinerType\022\027\n\023COMBINE_UNSPECIFI" + + "ED\020\000\022\007\n\003AND\020\001\022\006\n\002OR\020\002\022\036\n\032AND_WITH_MATCHI" + + "NG_RESOURCE\020\003:\311\001\352A\305\001\n%monitoring.googlea" + + "pis.com/AlertPolicy\022/projects/{project}/" + + "alertPolicies/{alert_policy}\0229organizati" + + "ons/{organization}/alertPolicies/{alert_" + + "policy}\022-folders/{folder}/alertPolicies/" + + "{alert_policy}\022\001*B\305\001\n\030com.google.monitor" + + "ing.v3B\nAlertProtoP\001ZAcloud.google.com/g" + + "o/monitoring/apiv3/v2/monitoringpb;monit" + + "oringpb\252\002\032Google.Cloud.Monitoring.V3\312\002\032G" + + "oogle\\Cloud\\Monitoring\\V3\352\002\035Google::Clou" + + "d::Monitoring::V3b\006proto3" }; descriptor = com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom( @@ -220,7 +260,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable( internal_static_google_monitoring_v3_AlertPolicy_Documentation_descriptor, new java.lang.String[] { - "Content", "MimeType", + "Content", "MimeType", "Subject", }); internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor = internal_static_google_monitoring_v3_AlertPolicy_descriptor.getNestedTypes().get(1); @@ -234,6 +274,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { "ConditionAbsent", "ConditionMatchedLog", "ConditionMonitoringQueryLanguage", + "ConditionPrometheusQueryLanguage", "Condition", }); internal_static_google_monitoring_v3_AlertPolicy_Condition_Trigger_descriptor = @@ -258,12 +299,23 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { "Aggregations", "DenominatorFilter", "DenominatorAggregations", + "ForecastOptions", "Comparison", "ThresholdValue", "Duration", "Trigger", "EvaluationMissingData", }); + internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_descriptor = + internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_descriptor + .getNestedTypes() + .get(0); + internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_fieldAccessorTable = + new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable( + internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricThreshold_ForecastOptions_descriptor, + new java.lang.String[] { + "ForecastHorizon", + }); internal_static_google_monitoring_v3_AlertPolicy_Condition_MetricAbsence_descriptor = internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor .getNestedTypes() @@ -304,13 +356,33 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { new java.lang.String[] { "Query", "Duration", "Trigger", "EvaluationMissingData", }); + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor = + internal_static_google_monitoring_v3_AlertPolicy_Condition_descriptor + .getNestedTypes() + .get(5); + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_fieldAccessorTable = + new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable( + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor, + new java.lang.String[] { + "Query", "Duration", "EvaluationInterval", "Labels", "RuleGroup", "AlertRule", + }); + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_LabelsEntry_descriptor = + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_descriptor + .getNestedTypes() + .get(0); + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_LabelsEntry_fieldAccessorTable = + new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable( + internal_static_google_monitoring_v3_AlertPolicy_Condition_PrometheusQueryLanguageCondition_LabelsEntry_descriptor, + new java.lang.String[] { + "Key", "Value", + }); internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor = internal_static_google_monitoring_v3_AlertPolicy_descriptor.getNestedTypes().get(2); internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_fieldAccessorTable = new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable( internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor, new java.lang.String[] { - "NotificationRateLimit", "AutoClose", + "NotificationRateLimit", "AutoClose", "NotificationChannelStrategy", }); internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationRateLimit_descriptor = internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor @@ -322,6 +394,16 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() { new java.lang.String[] { "Period", }); + internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_descriptor = + internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_descriptor + .getNestedTypes() + .get(1); + internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_fieldAccessorTable = + new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable( + internal_static_google_monitoring_v3_AlertPolicy_AlertStrategy_NotificationChannelStrategy_descriptor, + new java.lang.String[] { + "NotificationChannelNames", "RenotifyInterval", + }); internal_static_google_monitoring_v3_AlertPolicy_UserLabelsEntry_descriptor = internal_static_google_monitoring_v3_AlertPolicy_descriptor.getNestedTypes().get(3); internal_static_google_monitoring_v3_AlertPolicy_UserLabelsEntry_fieldAccessorTable = diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequest.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequest.java index 3709956e2ae2..a2b754a8029e 100644 --- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequest.java +++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequest.java @@ -70,8 +70,9 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() { * * * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-   * which to create the alerting policy. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+   * to create the alerting policy. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -106,8 +107,9 @@ public java.lang.String getName() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-   * which to create the alerting policy. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+   * to create the alerting policy. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -145,9 +147,9 @@ public com.google.protobuf.ByteString getNameBytes() {
    *
    *
    * 
-   * Required. The requested alerting policy. You should omit the `name` field in this
-   * policy. The name will be returned in the new policy, including
-   * a new `[ALERT_POLICY_ID]` value.
+   * Required. The requested alerting policy. You should omit the `name` field
+   * in this policy. The name will be returned in the new policy, including a
+   * new `[ALERT_POLICY_ID]` value.
    * 

    *
    * 
@@ -164,9 +166,9 @@ public boolean hasAlertPolicy() {
    *
    *
    * 
-   * Required. The requested alerting policy. You should omit the `name` field in this
-   * policy. The name will be returned in the new policy, including
-   * a new `[ALERT_POLICY_ID]` value.
+   * Required. The requested alerting policy. You should omit the `name` field
+   * in this policy. The name will be returned in the new policy, including a
+   * new `[ALERT_POLICY_ID]` value.
    * 

    *
    * 
@@ -185,9 +187,9 @@ public com.google.monitoring.v3.AlertPolicy getAlertPolicy() {
    *
    *
    * 
-   * Required. The requested alerting policy. You should omit the `name` field in this
-   * policy. The name will be returned in the new policy, including
-   * a new `[ALERT_POLICY_ID]` value.
+   * Required. The requested alerting policy. You should omit the `name` field
+   * in this policy. The name will be returned in the new policy, including a
+   * new `[ALERT_POLICY_ID]` value.
    * 

    *
    * 
@@ -580,8 +582,9 @@ public Builder mergeFrom(
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-     * which to create the alerting policy. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+     * to create the alerting policy. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -615,8 +618,9 @@ public java.lang.String getName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-     * which to create the alerting policy. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+     * to create the alerting policy. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -650,8 +654,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-     * which to create the alerting policy. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+     * to create the alerting policy. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -684,8 +689,9 @@ public Builder setName(java.lang.String value) {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-     * which to create the alerting policy. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+     * to create the alerting policy. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -714,8 +720,9 @@ public Builder clearName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-     * which to create the alerting policy. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+     * to create the alerting policy. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -756,9 +763,9 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -774,9 +781,9 @@ public boolean hasAlertPolicy() {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -798,9 +805,9 @@ public com.google.monitoring.v3.AlertPolicy getAlertPolicy() {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -824,9 +831,9 @@ public Builder setAlertPolicy(com.google.monitoring.v3.AlertPolicy value) {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -847,9 +854,9 @@ public Builder setAlertPolicy(com.google.monitoring.v3.AlertPolicy.Builder build
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -876,9 +883,9 @@ public Builder mergeAlertPolicy(com.google.monitoring.v3.AlertPolicy value) {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -899,9 +906,9 @@ public Builder clearAlertPolicy() {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -917,9 +924,9 @@ public com.google.monitoring.v3.AlertPolicy.Builder getAlertPolicyBuilder() {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
@@ -939,9 +946,9 @@ public com.google.monitoring.v3.AlertPolicyOrBuilder getAlertPolicyOrBuilder() {
      *
      *
      * 
-     * Required. The requested alerting policy. You should omit the `name` field in this
-     * policy. The name will be returned in the new policy, including
-     * a new `[ALERT_POLICY_ID]` value.
+     * Required. The requested alerting policy. You should omit the `name` field
+     * in this policy. The name will be returned in the new policy, including a
+     * new `[ALERT_POLICY_ID]` value.
      * 

      *
      * 
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequestOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequestOrBuilder.java
index b7287b6dcc01..1447a58ce5d3 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequestOrBuilder.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateAlertPolicyRequestOrBuilder.java
@@ -27,8 +27,9 @@ public interface CreateAlertPolicyRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-   * which to create the alerting policy. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+   * to create the alerting policy. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -52,8 +53,9 @@ public interface CreateAlertPolicyRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-   * which to create the alerting policy. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+   * to create the alerting policy. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -78,9 +80,9 @@ public interface CreateAlertPolicyRequestOrBuilder
    *
    *
    * 
-   * Required. The requested alerting policy. You should omit the `name` field in this
-   * policy. The name will be returned in the new policy, including
-   * a new `[ALERT_POLICY_ID]` value.
+   * Required. The requested alerting policy. You should omit the `name` field
+   * in this policy. The name will be returned in the new policy, including a
+   * new `[ALERT_POLICY_ID]` value.
    * 

    *
    * 
@@ -94,9 +96,9 @@ public interface CreateAlertPolicyRequestOrBuilder
    *
    *
    * 
-   * Required. The requested alerting policy. You should omit the `name` field in this
-   * policy. The name will be returned in the new policy, including
-   * a new `[ALERT_POLICY_ID]` value.
+   * Required. The requested alerting policy. You should omit the `name` field
+   * in this policy. The name will be returned in the new policy, including a
+   * new `[ALERT_POLICY_ID]` value.
    * 

    *
    * 
@@ -110,9 +112,9 @@ public interface CreateAlertPolicyRequestOrBuilder
    *
    *
    * 
-   * Required. The requested alerting policy. You should omit the `name` field in this
-   * policy. The name will be returned in the new policy, including
-   * a new `[ALERT_POLICY_ID]` value.
+   * Required. The requested alerting policy. You should omit the `name` field
+   * in this policy. The name will be returned in the new policy, including a
+   * new `[ALERT_POLICY_ID]` value.
    * 

    *
    * 
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequest.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequest.java
index 7feea07dc235..20adb1ed301f 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequest.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequest.java
@@ -71,8 +71,9 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -104,8 +105,9 @@ public java.lang.String getName() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -573,8 +575,9 @@ public Builder mergeFrom(
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -605,8 +608,9 @@ public java.lang.String getName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -637,8 +641,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -668,8 +673,9 @@ public Builder setName(java.lang.String value) {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -695,8 +701,9 @@ public Builder clearName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequestOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequestOrBuilder.java
index 0855819151f3..7312e5a6455c 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequestOrBuilder.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/CreateNotificationChannelRequestOrBuilder.java
@@ -27,8 +27,9 @@ public interface CreateNotificationChannelRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -49,8 +50,9 @@ public interface CreateNotificationChannelRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequest.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequest.java
index 0ac5cea3429c..2d624a9eab2a 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequest.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequest.java
@@ -72,9 +72,9 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * 
-   * Required. The notification channel for which a verification code is to be generated
-   * and retrieved. This must name a channel that is already verified; if
-   * the specified channel is not verified, the request will fail.
+   * Required. The notification channel for which a verification code is to be
+   * generated and retrieved. This must name a channel that is already verified;
+   * if the specified channel is not verified, the request will fail.
    * 

    *
    * 
@@ -99,9 +99,9 @@ public java.lang.String getName() {
    *
    *
    * 
-   * Required. The notification channel for which a verification code is to be generated
-   * and retrieved. This must name a channel that is already verified; if
-   * the specified channel is not verified, the request will fail.
+   * Required. The notification channel for which a verification code is to be
+   * generated and retrieved. This must name a channel that is already verified;
+   * if the specified channel is not verified, the request will fail.
    * 

    *
    * 
@@ -581,9 +581,9 @@ public Builder mergeFrom(
      *
      *
      * 
-     * Required. The notification channel for which a verification code is to be generated
-     * and retrieved. This must name a channel that is already verified; if
-     * the specified channel is not verified, the request will fail.
+     * Required. The notification channel for which a verification code is to be
+     * generated and retrieved. This must name a channel that is already verified;
+     * if the specified channel is not verified, the request will fail.
      * 

      *
      * 
@@ -607,9 +607,9 @@ public java.lang.String getName() {
      *
      *
      * 
-     * Required. The notification channel for which a verification code is to be generated
-     * and retrieved. This must name a channel that is already verified; if
-     * the specified channel is not verified, the request will fail.
+     * Required. The notification channel for which a verification code is to be
+     * generated and retrieved. This must name a channel that is already verified;
+     * if the specified channel is not verified, the request will fail.
      * 

      *
      * 
@@ -633,9 +633,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * 
-     * Required. The notification channel for which a verification code is to be generated
-     * and retrieved. This must name a channel that is already verified; if
-     * the specified channel is not verified, the request will fail.
+     * Required. The notification channel for which a verification code is to be
+     * generated and retrieved. This must name a channel that is already verified;
+     * if the specified channel is not verified, the request will fail.
      * 

      *
      * 
@@ -658,9 +658,9 @@ public Builder setName(java.lang.String value) {
      *
      *
      * 
-     * Required. The notification channel for which a verification code is to be generated
-     * and retrieved. This must name a channel that is already verified; if
-     * the specified channel is not verified, the request will fail.
+     * Required. The notification channel for which a verification code is to be
+     * generated and retrieved. This must name a channel that is already verified;
+     * if the specified channel is not verified, the request will fail.
      * 

      *
      * 
@@ -679,9 +679,9 @@ public Builder clearName() {
      *
      *
      * 
-     * Required. The notification channel for which a verification code is to be generated
-     * and retrieved. This must name a channel that is already verified; if
-     * the specified channel is not verified, the request will fail.
+     * Required. The notification channel for which a verification code is to be
+     * generated and retrieved. This must name a channel that is already verified;
+     * if the specified channel is not verified, the request will fail.
      * 

      *
      * 
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequestOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequestOrBuilder.java
index 3c5973052a9c..be449b5aeca0 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequestOrBuilder.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/GetNotificationChannelVerificationCodeRequestOrBuilder.java
@@ -27,9 +27,9 @@ public interface GetNotificationChannelVerificationCodeRequestOrBuilder
    *
    *
    * 
-   * Required. The notification channel for which a verification code is to be generated
-   * and retrieved. This must name a channel that is already verified; if
-   * the specified channel is not verified, the request will fail.
+   * Required. The notification channel for which a verification code is to be
+   * generated and retrieved. This must name a channel that is already verified;
+   * if the specified channel is not verified, the request will fail.
    * 

    *
    * 
@@ -43,9 +43,9 @@ public interface GetNotificationChannelVerificationCodeRequestOrBuilder
    *
    *
    * 
-   * Required. The notification channel for which a verification code is to be generated
-   * and retrieved. This must name a channel that is already verified; if
-   * the specified channel is not verified, the request will fail.
+   * Required. The notification channel for which a verification code is to be
+   * generated and retrieved. This must name a channel that is already verified;
+   * if the specified channel is not verified, the request will fail.
    * 

    *
    * 
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequest.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequest.java
index 66072d0cb72a..0011f103a54e 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequest.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequest.java
@@ -73,8 +73,9 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-   * whose alert policies are to be listed. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+   * alert policies are to be listed. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -107,8 +108,9 @@ public java.lang.String getName() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-   * whose alert policies are to be listed. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+   * alert policies are to be listed. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -772,8 +774,9 @@ public Builder mergeFrom(
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-     * whose alert policies are to be listed. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+     * alert policies are to be listed. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -805,8 +808,9 @@ public java.lang.String getName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-     * whose alert policies are to be listed. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+     * alert policies are to be listed. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -838,8 +842,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-     * whose alert policies are to be listed. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+     * alert policies are to be listed. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -870,8 +875,9 @@ public Builder setName(java.lang.String value) {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-     * whose alert policies are to be listed. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+     * alert policies are to be listed. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -898,8 +904,9 @@ public Builder clearName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-     * whose alert policies are to be listed. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+     * alert policies are to be listed. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequestOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequestOrBuilder.java
index d0028ffdfe2b..0496aa25b831 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequestOrBuilder.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListAlertPoliciesRequestOrBuilder.java
@@ -27,8 +27,9 @@ public interface ListAlertPoliciesRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-   * whose alert policies are to be listed. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+   * alert policies are to be listed. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -50,8 +51,9 @@ public interface ListAlertPoliciesRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-   * whose alert policies are to be listed. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+   * alert policies are to be listed. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequest.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequest.java
index a9e946bff224..7076933bc734 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequest.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequest.java
@@ -74,8 +74,9 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -109,8 +110,9 @@ public java.lang.String getName() {
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -778,8 +780,9 @@ public Builder mergeFrom(
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -812,8 +815,9 @@ public java.lang.String getName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -846,8 +850,9 @@ public com.google.protobuf.ByteString getNameBytes() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -879,8 +884,9 @@ public Builder setName(java.lang.String value) {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
@@ -908,8 +914,9 @@ public Builder clearName() {
      *
      *
      * 
-     * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-     * which to execute the request. The format is:
+     * Required. The
+     * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+     * to execute the request. The format is:
      *
      *     projects/[PROJECT_ID_OR_NUMBER]
      *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequestOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequestOrBuilder.java
index 7d631f45ec8e..ad10255a7695 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequestOrBuilder.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/ListNotificationChannelsRequestOrBuilder.java
@@ -27,8 +27,9 @@ public interface ListNotificationChannelsRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
@@ -51,8 +52,9 @@ public interface ListNotificationChannelsRequestOrBuilder
    *
    *
    * 
-   * Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-   * which to execute the request. The format is:
+   * Required. The
+   * [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+   * to execute the request. The format is:
    *
    *     projects/[PROJECT_ID_OR_NUMBER]
    *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannel.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannel.java
index 8f06f09adf94..78d138bcf6e1 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannel.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannel.java
@@ -272,7 +272,9 @@ private VerificationStatus(int value) {
    *
    * 
    * The type of the notification channel. This field matches the
-   * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+   * value of the
+   * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+   * field.
    * 

    *
    * string type = 1;
@@ -296,7 +298,9 @@ public java.lang.String getType() {
    *
    * 
    * The type of the notification channel. This field matches the
-   * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+   * value of the
+   * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+   * field.
    * 

    *
    * string type = 1;
@@ -519,8 +523,8 @@ public int getLabelsCount() {
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -544,8 +548,8 @@ public java.util.Map getLabels() {
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -560,8 +564,8 @@ public java.util.Map getLabelsMap() {
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -583,8 +587,8 @@ public java.util.Map getLabelsMap() {
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -1674,7 +1678,9 @@ public Builder mergeFrom(
      *
      * 
      * The type of the notification channel. This field matches the
-     * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+     * value of the
+     * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+     * field.
      * 

      *
      * string type = 1;
@@ -1697,7 +1703,9 @@ public java.lang.String getType() {
      *
      * 
      * The type of the notification channel. This field matches the
-     * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+     * value of the
+     * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+     * field.
      * 

      *
      * string type = 1;
@@ -1720,7 +1728,9 @@ public com.google.protobuf.ByteString getTypeBytes() {
      *
      * 
      * The type of the notification channel. This field matches the
-     * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+     * value of the
+     * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+     * field.
      * 

      *
      * string type = 1;
@@ -1742,7 +1752,9 @@ public Builder setType(java.lang.String value) {
      *
      * 
      * The type of the notification channel. This field matches the
-     * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+     * value of the
+     * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+     * field.
      * 

      *
      * string type = 1;
@@ -1760,7 +1772,9 @@ public Builder clearType() {
      *
      * 
      * The type of the notification channel. This field matches the
-     * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+     * value of the
+     * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+     * field.
      * 

      *
      * string type = 1;
@@ -2173,8 +2187,8 @@ public int getLabelsCount() {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
@@ -2198,8 +2212,8 @@ public java.util.Map getLabels() {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
@@ -2214,8 +2228,8 @@ public java.util.Map getLabelsMap() {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
@@ -2237,8 +2251,8 @@ public java.util.Map getLabelsMap() {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
@@ -2266,8 +2280,8 @@ public Builder clearLabels() {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
@@ -2291,8 +2305,8 @@ public java.util.Map getMutableLabels() {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
@@ -2314,8 +2328,8 @@ public Builder putLabels(java.lang.String key, java.lang.String value) {
      * 
      * Configuration fields that define the channel and its behavior. The
      * permissible and required labels are specified in the
-     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-     * `NotificationChannelDescriptor` corresponding to the `type` field.
+     * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+     * of the `NotificationChannelDescriptor` corresponding to the `type` field.
      * 

      *
      * map<string, string> labels = 5;
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelOrBuilder.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelOrBuilder.java
index 4190e8dfff15..8cf3c972e4c1 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelOrBuilder.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/NotificationChannelOrBuilder.java
@@ -28,7 +28,9 @@ public interface NotificationChannelOrBuilder
    *
    * 
    * The type of the notification channel. This field matches the
-   * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+   * value of the
+   * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+   * field.
    * 

    *
    * string type = 1;
@@ -41,7 +43,9 @@ public interface NotificationChannelOrBuilder
    *
    * 
    * The type of the notification channel. This field matches the
-   * value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+   * value of the
+   * [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+   * field.
    * 

    *
    * string type = 1;
@@ -149,8 +153,8 @@ public interface NotificationChannelOrBuilder
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -162,8 +166,8 @@ public interface NotificationChannelOrBuilder
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -178,8 +182,8 @@ public interface NotificationChannelOrBuilder
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -191,8 +195,8 @@ public interface NotificationChannelOrBuilder
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
@@ -208,8 +212,8 @@ java.lang.String getLabelsOrDefault(
    * 
    * Configuration fields that define the channel and its behavior. The
    * permissible and required labels are specified in the
-   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-   * `NotificationChannelDescriptor` corresponding to the `type` field.
+   * [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+   * of the `NotificationChannelDescriptor` corresponding to the `type` field.
    * 

    *
    * map<string, string> labels = 5;
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/Snooze.java b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/Snooze.java
index 871e709565a3..dccf5d1c32ae 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/Snooze.java
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/Snooze.java
@@ -79,7 +79,7 @@ public interface CriteriaOrBuilder
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -97,7 +97,7 @@ public interface CriteriaOrBuilder
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -115,7 +115,7 @@ public interface CriteriaOrBuilder
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -134,7 +134,7 @@ public interface CriteriaOrBuilder
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -205,7 +205,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -225,7 +225,7 @@ public com.google.protobuf.ProtocolStringList getPoliciesList() {
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -245,7 +245,7 @@ public int getPoliciesCount() {
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -266,7 +266,7 @@ public java.lang.String getPolicies(int index) {
      *
      *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
      *
-     * There is a limit of 10 policies per snooze. This limit is checked during
+     * There is a limit of 16 policies per snooze. This limit is checked during
      * snooze creation.
      * 

      *
@@ -658,7 +658,7 @@ private void ensurePoliciesIsMutable() {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -679,7 +679,7 @@ public com.google.protobuf.ProtocolStringList getPoliciesList() {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -699,7 +699,7 @@ public int getPoliciesCount() {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -720,7 +720,7 @@ public java.lang.String getPolicies(int index) {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -741,7 +741,7 @@ public com.google.protobuf.ByteString getPoliciesBytes(int index) {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -770,7 +770,7 @@ public Builder setPolicies(int index, java.lang.String value) {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -798,7 +798,7 @@ public Builder addPolicies(java.lang.String value) {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -823,7 +823,7 @@ public Builder addAllPolicies(java.lang.Iterable values) {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
@@ -847,7 +847,7 @@ public Builder clearPolicies() {
        *
        *     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
        *
-       * There is a limit of 10 policies per snooze. This limit is checked during
+       * There is a limit of 16 policies per snooze. This limit is checked during
        * snooze creation.
        * 

        *
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert.proto b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert.proto
index f0a54b9cc314..b746a5e47d52 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert.proto
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert.proto
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -36,6 +36,7 @@ option ruby_package = "Google::Cloud::Monitoring::V3";
 // considered to be "unhealthy" and the ways to notify people or services about
 // this state. For an overview of alert policies, see
 // [Introduction to Alerting](https://cloud.google.com/monitoring/alerts/).
+//
 message AlertPolicy {
   option (google.api.resource) = {
     type: "monitoring.googleapis.com/AlertPolicy"
@@ -48,7 +49,7 @@ message AlertPolicy {
   // A content string and a MIME type that describes the content string's
   // format.
   message Documentation {
-    // The text of the documentation, interpreted according to `mime_type`.
+    // The body of the documentation, interpreted according to `mime_type`.
     // The content may not exceed 8,192 Unicode characters and may not exceed
     // more than 10,240 bytes when encoded in UTF-8 format, whichever is
     // smaller. This text can be [templatized by using
@@ -59,6 +60,21 @@ message AlertPolicy {
     // `"text/markdown"` is supported. See
     // [Markdown](https://en.wikipedia.org/wiki/Markdown) for more information.
     string mime_type = 2;
+
+    // Optional. The subject line of the notification. The subject line may not
+    // exceed 10,240 bytes. In notifications generated by this policy, the
+    // contents of the subject line after variable expansion will be truncated
+    // to 255 bytes or shorter at the latest UTF-8 character boundary. The
+    // 255-byte limit is recommended by [this
+    // thread](https://stackoverflow.com/questions/1592291/what-is-the-email-subject-length-limit).
+    // It is both the limit imposed by some third-party ticketing products and
+    // it is common to define textual fields in databases as VARCHAR(255).
+    //
+    // The contents of the subject line can be [templatized by using
+    // variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+    // If this field is missing or empty, a default subject line will be
+    // generated.
+    string subject = 3 [(google.api.field_behavior) = OPTIONAL];
   }
 
   // A condition is a true/false test that determines when an alerting policy
@@ -111,7 +127,20 @@ message AlertPolicy {
     // A condition type that compares a collection of time series
     // against a threshold.
     message MetricThreshold {
-      // Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+      // Options used when forecasting the time series and testing
+      // the predicted value against the threshold.
+      message ForecastOptions {
+        // Required. The length of time into the future to forecast whether a
+        // time series will violate the threshold. If the predicted value is
+        // found to violate the threshold, and the violation is observed in all
+        // forecasts made for the configured `duration`, then the time series is
+        // considered to be failing.
+        google.protobuf.Duration forecast_horizon = 1
+            [(google.api.field_behavior) = REQUIRED];
+      }
+
+      // Required. A
+      // [filter](https://cloud.google.com/monitoring/api/v3/filters) that
       // identifies which time series should be compared with the threshold.
       //
       // The filter is similar to the one that is specified in the
@@ -159,6 +188,13 @@ message AlertPolicy {
       // and produce time series that have the same periodicity and labels.
       repeated Aggregation denominator_aggregations = 10;
 
+      // When this field is present, the `MetricThreshold` condition forecasts
+      // whether the time series is predicted to violate the threshold within
+      // the `forecast_horizon`. When this field is not set, the
+      // `MetricThreshold` tests the current value of the timeseries against the
+      // threshold.
+      ForecastOptions forecast_options = 12;
+
       // The comparison to apply between the time series (indicated by `filter`
       // and `aggregation`) and the threshold (indicated by `threshold_value`).
       // The comparison is applied on each time series, with the time series
@@ -201,7 +237,8 @@ message AlertPolicy {
     // when a time series for the specified metric of a monitored
     // resource does not include any data in the specified `duration`.
     message MetricAbsence {
-      // Required. A [filter](https://cloud.google.com/monitoring/api/v3/filters) that
+      // Required. A
+      // [filter](https://cloud.google.com/monitoring/api/v3/filters) that
       // identifies which time series should be compared with the threshold.
       //
       // The filter is similar to the one that is specified in the
@@ -298,6 +335,100 @@ message AlertPolicy {
       EvaluationMissingData evaluation_missing_data = 4;
     }
 
+    // A condition type that allows alert policies to be defined using
+    // [Prometheus Query Language
+    // (PromQL)](https://prometheus.io/docs/prometheus/latest/querying/basics/).
+    //
+    // The PrometheusQueryLanguageCondition message contains information
+    // from a Prometheus alerting rule and its associated rule group.
+    //
+    // A Prometheus alerting rule is described
+    // [here](https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/).
+    // The semantics of a Prometheus alerting rule is described
+    // [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#rule).
+    //
+    // A Prometheus rule group is described
+    // [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/).
+    // The semantics of a Prometheus rule group is described
+    // [here](https://prometheus.io/docs/prometheus/latest/configuration/recording_rules/#rule_group).
+    //
+    // Because Cloud Alerting has no representation of a Prometheus rule
+    // group resource, we must embed the information of the parent rule
+    // group inside each of the conditions that refer to it. We must also
+    // update the contents of all Prometheus alerts in case the information
+    // of their rule group changes.
+    //
+    // The PrometheusQueryLanguageCondition protocol buffer combines the
+    // information of the corresponding rule group and alerting rule.
+    // The structure of the PrometheusQueryLanguageCondition protocol buffer
+    // does NOT mimic the structure of the Prometheus rule group and alerting
+    // rule YAML declarations. The PrometheusQueryLanguageCondition protocol
+    // buffer may change in the future to support future rule group and/or
+    // alerting rule features. There are no new such features at the present
+    // time (2023-06-26).
+    message PrometheusQueryLanguageCondition {
+      // Required. The PromQL expression to evaluate. Every evaluation cycle
+      // this expression is evaluated at the current time, and all resultant
+      // time series become pending/firing alerts. This field must not be empty.
+      string query = 1 [(google.api.field_behavior) = REQUIRED];
+
+      // Optional. Alerts are considered firing once their PromQL expression was
+      // evaluated to be "true" for this long.
+      // Alerts whose PromQL expression was not evaluated to be "true" for
+      // long enough are considered pending.
+      // Must be a non-negative duration or missing.
+      // This field is optional. Its default value is zero.
+      google.protobuf.Duration duration = 2
+          [(google.api.field_behavior) = OPTIONAL];
+
+      // Optional. How often this rule should be evaluated.
+      // Must be a positive multiple of 30 seconds or missing.
+      // This field is optional. Its default value is 30 seconds.
+      // If this PrometheusQueryLanguageCondition was generated from a
+      // Prometheus alerting rule, then this value should be taken from the
+      // enclosing rule group.
+      google.protobuf.Duration evaluation_interval = 3
+          [(google.api.field_behavior) = OPTIONAL];
+
+      // Optional. Labels to add to or overwrite in the PromQL query result.
+      // Label names [must be
+      // valid](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+      // Label values can be [templatized by using
+      // variables](https://cloud.google.com/monitoring/alerts/doc-variables).
+      // The only available variable names are the names of the labels in the
+      // PromQL result, including "__name__" and "value". "labels" may be empty.
+      map labels = 4 [(google.api.field_behavior) = OPTIONAL];
+
+      // Optional. The rule group name of this alert in the corresponding
+      // Prometheus configuration file.
+      //
+      // Some external tools may require this field to be populated correctly
+      // in order to refer to the original Prometheus configuration file.
+      // The rule group name and the alert name are necessary to update the
+      // relevant AlertPolicies in case the definition of the rule group changes
+      // in the future.
+      //
+      // This field is optional. If this field is not empty, then it must
+      // contain a valid UTF-8 string.
+      // This field may not exceed 2048 Unicode characters in length.
+      string rule_group = 5 [(google.api.field_behavior) = OPTIONAL];
+
+      // Optional. The alerting rule name of this alert in the corresponding
+      // Prometheus configuration file.
+      //
+      // Some external tools may require this field to be populated correctly
+      // in order to refer to the original Prometheus configuration file.
+      // The rule group name and the alert name are necessary to update the
+      // relevant AlertPolicies in case the definition of the rule group changes
+      // in the future.
+      //
+      // This field is optional. If this field is not empty, then it must be a
+      // [valid Prometheus label
+      // name](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels).
+      // This field may not exceed 2048 Unicode characters in length.
+      string alert_rule = 6 [(google.api.field_behavior) = OPTIONAL];
+    }
+
     // Required if the condition exists. The unique resource name for this
     // condition. Its format is:
     //
@@ -346,6 +477,9 @@ message AlertPolicy {
       // A condition that uses the Monitoring Query Language to define
       // alerts.
       MonitoringQueryLanguageCondition condition_monitoring_query_language = 19;
+
+      // A condition that uses the Prometheus query language to define alerts.
+      PrometheusQueryLanguageCondition condition_prometheus_query_language = 21;
     }
   }
 
@@ -380,6 +514,23 @@ message AlertPolicy {
       google.protobuf.Duration period = 1;
     }
 
+    // Control over how the notification channels in `notification_channels`
+    // are notified when this alert fires, on a per-channel basis.
+    message NotificationChannelStrategy {
+      // The full REST resource name for the notification channels that these
+      // settings apply to. Each of these correspond to the name field in one
+      // of the NotificationChannel objects referenced in the
+      // notification_channels field of this AlertPolicy.
+      // The format is:
+      //
+      //     projects/[PROJECT_ID_OR_NUMBER]/notificationChannels/[CHANNEL_ID]
+      repeated string notification_channel_names = 1;
+
+      // The frequency at which to send reminder notifications for open
+      // incidents.
+      google.protobuf.Duration renotify_interval = 2;
+    }
+
     // Required for alert policies with a `LogMatch` condition.
     //
     // This limit is not implemented for alert policies that are not log-based.
@@ -388,6 +539,9 @@ message AlertPolicy {
     // If an alert policy that was active has no data for this long, any open
     // incidents will close
     google.protobuf.Duration auto_close = 3;
+
+    // Control how notifications will be sent out, on a per-channel basis.
+    repeated NotificationChannelStrategy notification_channel_strategy = 4;
   }
 
   // Required if the policy exists. The resource name for this policy. The
@@ -406,6 +560,12 @@ message AlertPolicy {
   // notifications, and incidents. To avoid confusion, don't use the same
   // display name for multiple policies in the same project. The name is
   // limited to 512 Unicode characters.
+  //
+  // The convention for the display_name of a PrometheusQueryLanguageCondition
+  // is "{rule group name}/{alert name}", where the {rule group name} and
+  // {alert name} should be taken from the corresponding Prometheus
+  // configuration file. This convention is not enforced.
+  // In any case the display_name is not a unique key of the AlertPolicy.
   string display_name = 2;
 
   // Documentation that is included with notifications and incidents related to
@@ -422,6 +582,13 @@ message AlertPolicy {
   // 63 Unicode characters or 128 bytes, whichever is smaller. Labels and
   // values can contain only lowercase letters, numerals, underscores, and
   // dashes. Keys must begin with a letter.
+  //
+  // Note that Prometheus {alert name} is a
+  // [valid Prometheus label
+  // names](https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels),
+  // whereas Prometheus {rule group} is an unrestricted UTF-8 string.
+  // This means that they cannot be stored as-is in user labels, because
+  // they may contain characters that are not allowed in user-label values.
   map user_labels = 16;
 
   // A list of conditions for the policy. The conditions are combined by AND or
@@ -430,6 +597,8 @@ message AlertPolicy {
   // conditions.
   // If `condition_time_series_query_language` is present, it must be the only
   // `condition`.
+  // If `condition_monitoring_query_language` is present, it must be the only
+  // `condition`.
   repeated Condition conditions = 12;
 
   // How to combine the results of multiple conditions to determine if an
@@ -445,8 +614,9 @@ message AlertPolicy {
   // a field projection has been specified that strips it out.
   google.protobuf.BoolValue enabled = 17;
 
-  // Read-only description of how the alert policy is invalid. OK if the alert
-  // policy is valid. If not OK, the alert policy will not generate incidents.
+  // Read-only description of how the alert policy is invalid. This field is
+  // only set when the alert policy is invalid. An invalid alert policy will not
+  // generate incidents.
   google.rpc.Status validity = 18;
 
   // Identifies the notification channels to which notifications should be sent
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert_service.proto b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert_service.proto
index 5d8d81854cf3..d93ad0bada41 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert_service.proto
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/alert_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -49,7 +49,8 @@ service AlertPolicyService {
       "https://www.googleapis.com/auth/monitoring.read";
 
   // Lists the existing alerting policies for the workspace.
-  rpc ListAlertPolicies(ListAlertPoliciesRequest) returns (ListAlertPoliciesResponse) {
+  rpc ListAlertPolicies(ListAlertPoliciesRequest)
+      returns (ListAlertPoliciesResponse) {
     option (google.api.http) = {
       get: "/v3/{name=projects/*}/alertPolicies"
     };
@@ -65,6 +66,10 @@ service AlertPolicyService {
   }
 
   // Creates a new alerting policy.
+  //
+  // Design your application to single-thread API calls that modify the state of
+  // alerting policies in a single project. This includes calls to
+  // CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
   rpc CreateAlertPolicy(CreateAlertPolicyRequest) returns (AlertPolicy) {
     option (google.api.http) = {
       post: "/v3/{name=projects/*}/alertPolicies"
@@ -74,7 +79,12 @@ service AlertPolicyService {
   }
 
   // Deletes an alerting policy.
-  rpc DeleteAlertPolicy(DeleteAlertPolicyRequest) returns (google.protobuf.Empty) {
+  //
+  // Design your application to single-thread API calls that modify the state of
+  // alerting policies in a single project. This includes calls to
+  // CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
+  rpc DeleteAlertPolicy(DeleteAlertPolicyRequest)
+      returns (google.protobuf.Empty) {
     option (google.api.http) = {
       delete: "/v3/{name=projects/*/alertPolicies/*}"
     };
@@ -85,6 +95,10 @@ service AlertPolicyService {
   // a new one or replace only certain fields in the current alerting policy by
   // specifying the fields to be updated via `updateMask`. Returns the
   // updated alerting policy.
+  //
+  // Design your application to single-thread API calls that modify the state of
+  // alerting policies in a single project. This includes calls to
+  // CreateAlertPolicy, DeleteAlertPolicy and UpdateAlertPolicy.
   rpc UpdateAlertPolicy(UpdateAlertPolicyRequest) returns (AlertPolicy) {
     option (google.api.http) = {
       patch: "/v3/{alert_policy.name=projects/*/alertPolicies/*}"
@@ -96,8 +110,9 @@ service AlertPolicyService {
 
 // The protocol for the `CreateAlertPolicy` request.
 message CreateAlertPolicyRequest {
-  // Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) in
-  // which to create the alerting policy. The format is:
+  // Required. The
+  // [project](https://cloud.google.com/monitoring/api/v3#project_name) in which
+  // to create the alerting policy. The format is:
   //
   //     projects/[PROJECT_ID_OR_NUMBER]
   //
@@ -115,9 +130,9 @@ message CreateAlertPolicyRequest {
     }
   ];
 
-  // Required. The requested alerting policy. You should omit the `name` field in this
-  // policy. The name will be returned in the new policy, including
-  // a new `[ALERT_POLICY_ID]` value.
+  // Required. The requested alerting policy. You should omit the `name` field
+  // in this policy. The name will be returned in the new policy, including a
+  // new `[ALERT_POLICY_ID]` value.
   AlertPolicy alert_policy = 2 [(google.api.field_behavior) = REQUIRED];
 }
 
@@ -136,8 +151,9 @@ message GetAlertPolicyRequest {
 
 // The protocol for the `ListAlertPolicies` request.
 message ListAlertPoliciesRequest {
-  // Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name)
-  // whose alert policies are to be listed. The format is:
+  // Required. The
+  // [project](https://cloud.google.com/monitoring/api/v3#project_name) whose
+  // alert policies are to be listed. The format is:
   //
   //     projects/[PROJECT_ID_OR_NUMBER]
   //
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification.proto b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification.proto
index cbd287527efe..67df55bada2a 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification.proto
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification.proto
@@ -1,4 +1,4 @@
-// Copyright 2021 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -118,7 +118,9 @@ message NotificationChannel {
   }
 
   // The type of the notification channel. This field matches the
-  // value of the [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type] field.
+  // value of the
+  // [NotificationChannelDescriptor.type][google.monitoring.v3.NotificationChannelDescriptor.type]
+  // field.
   string type = 1;
 
   // The full REST resource name for this channel. The format is:
@@ -141,8 +143,8 @@ message NotificationChannel {
 
   // Configuration fields that define the channel and its behavior. The
   // permissible and required labels are specified in the
-  // [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels] of the
-  // `NotificationChannelDescriptor` corresponding to the `type` field.
+  // [NotificationChannelDescriptor.labels][google.monitoring.v3.NotificationChannelDescriptor.labels]
+  // of the `NotificationChannelDescriptor` corresponding to the `type` field.
   map labels = 5;
 
   // User-supplied key/value data that does not need to conform to
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification_service.proto b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification_service.proto
index a27404321dfd..8b14dcf41bb6 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification_service.proto
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/notification_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2021 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -44,7 +44,9 @@ service NotificationChannelService {
 
   // Lists the descriptors for supported channel types. The use of descriptors
   // makes it possible for new channel types to be dynamically added.
-  rpc ListNotificationChannelDescriptors(ListNotificationChannelDescriptorsRequest) returns (ListNotificationChannelDescriptorsResponse) {
+  rpc ListNotificationChannelDescriptors(
+      ListNotificationChannelDescriptorsRequest)
+      returns (ListNotificationChannelDescriptorsResponse) {
     option (google.api.http) = {
       get: "/v3/{name=projects/*}/notificationChannelDescriptors"
     };
@@ -53,7 +55,8 @@ service NotificationChannelService {
 
   // Gets a single channel descriptor. The descriptor indicates which fields
   // are expected / permitted for a notification channel of the given type.
-  rpc GetNotificationChannelDescriptor(GetNotificationChannelDescriptorRequest) returns (NotificationChannelDescriptor) {
+  rpc GetNotificationChannelDescriptor(GetNotificationChannelDescriptorRequest)
+      returns (NotificationChannelDescriptor) {
     option (google.api.http) = {
       get: "/v3/{name=projects/*/notificationChannelDescriptors/*}"
     };
@@ -61,7 +64,10 @@ service NotificationChannelService {
   }
 
   // Lists the notification channels that have been created for the project.
-  rpc ListNotificationChannels(ListNotificationChannelsRequest) returns (ListNotificationChannelsResponse) {
+  // To list the types of notification channels that are supported, use
+  // the `ListNotificationChannelDescriptors` method.
+  rpc ListNotificationChannels(ListNotificationChannelsRequest)
+      returns (ListNotificationChannelsResponse) {
     option (google.api.http) = {
       get: "/v3/{name=projects/*}/notificationChannels"
     };
@@ -73,7 +79,8 @@ service NotificationChannelService {
   // response may truncate or omit passwords, API keys, or other private key
   // matter and thus the response may not be 100% identical to the information
   // that was supplied in the call to the create method.
-  rpc GetNotificationChannel(GetNotificationChannelRequest) returns (NotificationChannel) {
+  rpc GetNotificationChannel(GetNotificationChannelRequest)
+      returns (NotificationChannel) {
     option (google.api.http) = {
       get: "/v3/{name=projects/*/notificationChannels/*}"
     };
@@ -82,7 +89,13 @@ service NotificationChannelService {
 
   // Creates a new notification channel, representing a single notification
   // endpoint such as an email address, SMS number, or PagerDuty service.
-  rpc CreateNotificationChannel(CreateNotificationChannelRequest) returns (NotificationChannel) {
+  //
+  // Design your application to single-thread API calls that modify the state of
+  // notification channels in a single project. This includes calls to
+  // CreateNotificationChannel, DeleteNotificationChannel and
+  // UpdateNotificationChannel.
+  rpc CreateNotificationChannel(CreateNotificationChannelRequest)
+      returns (NotificationChannel) {
     option (google.api.http) = {
       post: "/v3/{name=projects/*}/notificationChannels"
       body: "notification_channel"
@@ -92,7 +105,13 @@ service NotificationChannelService {
 
   // Updates a notification channel. Fields not specified in the field mask
   // remain unchanged.
-  rpc UpdateNotificationChannel(UpdateNotificationChannelRequest) returns (NotificationChannel) {
+  //
+  // Design your application to single-thread API calls that modify the state of
+  // notification channels in a single project. This includes calls to
+  // CreateNotificationChannel, DeleteNotificationChannel and
+  // UpdateNotificationChannel.
+  rpc UpdateNotificationChannel(UpdateNotificationChannelRequest)
+      returns (NotificationChannel) {
     option (google.api.http) = {
       patch: "/v3/{notification_channel.name=projects/*/notificationChannels/*}"
       body: "notification_channel"
@@ -101,7 +120,13 @@ service NotificationChannelService {
   }
 
   // Deletes a notification channel.
-  rpc DeleteNotificationChannel(DeleteNotificationChannelRequest) returns (google.protobuf.Empty) {
+  //
+  // Design your application to single-thread API calls that modify the state of
+  // notification channels in a single project. This includes calls to
+  // CreateNotificationChannel, DeleteNotificationChannel and
+  // UpdateNotificationChannel.
+  rpc DeleteNotificationChannel(DeleteNotificationChannelRequest)
+      returns (google.protobuf.Empty) {
     option (google.api.http) = {
       delete: "/v3/{name=projects/*/notificationChannels/*}"
     };
@@ -110,7 +135,9 @@ service NotificationChannelService {
 
   // Causes a verification code to be delivered to the channel. The code
   // can then be supplied in `VerifyNotificationChannel` to verify the channel.
-  rpc SendNotificationChannelVerificationCode(SendNotificationChannelVerificationCodeRequest) returns (google.protobuf.Empty) {
+  rpc SendNotificationChannelVerificationCode(
+      SendNotificationChannelVerificationCodeRequest)
+      returns (google.protobuf.Empty) {
     option (google.api.http) = {
       post: "/v3/{name=projects/*/notificationChannels/*}:sendVerificationCode"
       body: "*"
@@ -139,7 +166,9 @@ service NotificationChannelService {
   // have a shorter expiration (e.g. codes such as "G-123456") whereas
   // GetVerificationCode() will typically return a much longer, websafe base
   // 64 encoded string that has a longer expiration time.
-  rpc GetNotificationChannelVerificationCode(GetNotificationChannelVerificationCodeRequest) returns (GetNotificationChannelVerificationCodeResponse) {
+  rpc GetNotificationChannelVerificationCode(
+      GetNotificationChannelVerificationCodeRequest)
+      returns (GetNotificationChannelVerificationCodeResponse) {
     option (google.api.http) = {
       post: "/v3/{name=projects/*/notificationChannels/*}:getVerificationCode"
       body: "*"
@@ -150,7 +179,8 @@ service NotificationChannelService {
   // Verifies a `NotificationChannel` by proving receipt of the code
   // delivered to the channel as a result of calling
   // `SendNotificationChannelVerificationCode`.
-  rpc VerifyNotificationChannel(VerifyNotificationChannelRequest) returns (NotificationChannel) {
+  rpc VerifyNotificationChannel(VerifyNotificationChannelRequest)
+      returns (NotificationChannel) {
     option (google.api.http) = {
       post: "/v3/{name=projects/*/notificationChannels/*}:verify"
       body: "*"
@@ -218,8 +248,9 @@ message GetNotificationChannelDescriptorRequest {
 
 // The `CreateNotificationChannel` request.
 message CreateNotificationChannelRequest {
-  // Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-  // which to execute the request. The format is:
+  // Required. The
+  // [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+  // to execute the request. The format is:
   //
   //     projects/[PROJECT_ID_OR_NUMBER]
   //
@@ -235,13 +266,15 @@ message CreateNotificationChannelRequest {
   ];
 
   // Required. The definition of the `NotificationChannel` to create.
-  NotificationChannel notification_channel = 2 [(google.api.field_behavior) = REQUIRED];
+  NotificationChannel notification_channel = 2
+      [(google.api.field_behavior) = REQUIRED];
 }
 
 // The `ListNotificationChannels` request.
 message ListNotificationChannelsRequest {
-  // Required. The [project](https://cloud.google.com/monitoring/api/v3#project_name) on
-  // which to execute the request. The format is:
+  // Required. The
+  // [project](https://cloud.google.com/monitoring/api/v3#project_name) on which
+  // to execute the request. The format is:
   //
   //     projects/[PROJECT_ID_OR_NUMBER]
   //
@@ -322,7 +355,8 @@ message UpdateNotificationChannelRequest {
   // notification channel. The description must provide a definition for
   // fields to be updated; the names of these fields should also be
   // included in the `update_mask`.
-  NotificationChannel notification_channel = 3 [(google.api.field_behavior) = REQUIRED];
+  NotificationChannel notification_channel = 3
+      [(google.api.field_behavior) = REQUIRED];
 }
 
 // The `DeleteNotificationChannel` request.
@@ -357,9 +391,9 @@ message SendNotificationChannelVerificationCodeRequest {
 
 // The `GetNotificationChannelVerificationCode` request.
 message GetNotificationChannelVerificationCodeRequest {
-  // Required. The notification channel for which a verification code is to be generated
-  // and retrieved. This must name a channel that is already verified; if
-  // the specified channel is not verified, the request will fail.
+  // Required. The notification channel for which a verification code is to be
+  // generated and retrieved. This must name a channel that is already verified;
+  // if the specified channel is not verified, the request will fail.
   string name = 1 [
     (google.api.field_behavior) = REQUIRED,
     (google.api.resource_reference) = {
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze.proto b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze.proto
index cbaa49bb4f62..f20e1a0bd84f 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze.proto
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze.proto
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ message Snooze {
     //
     //     projects/[PROJECT_ID_OR_NUMBER]/alertPolicies/[POLICY_ID]
     //
-    // There is a limit of 10 policies per snooze. This limit is checked during
+    // There is a limit of 16 policies per snooze. This limit is checked during
     // snooze creation.
     repeated string policies = 1 [(google.api.resource_reference) = {
       type: "monitoring.googleapis.com/AlertPolicy"
diff --git a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze_service.proto b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze_service.proto
index 622f7cd1491b..286551a5a611 100644
--- a/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze_service.proto
+++ b/java-monitoring/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/snooze_service.proto
@@ -1,4 +1,4 @@
-// Copyright 2022 Google LLC
+// Copyright 2023 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.