vdk-examples: Change Meta Jobs to DAGs in examples (#2024)

This PR corrects two examples to bring them in line with the changed
name of VDK DAGs.

---------

Signed-off-by: Gabriel Georgiev <[email protected]>

examples/metajob-example/README.md → examples/dag-example/README.md

@@ -1,18 +1,18 @@
 Overview
 --------
-Meta Jobs allow VDK users to schedule jobs in a directed acyclic graph.
+DAGs allow VDK users to schedule jobs in a directed acyclic graph.
 This means that jobs can be configured to run only when a set of previous jobs have finished successfully.
 
 In this example we will use the Versatile Data Kit to develop four Data jobs - two of these jobs will read data
 from separate json files, and will subsequently insert the data into Trino tables. The third job will read the data
-inserted by the previous two jobs, and will print the data to the terminal. The fourth Data Job will be a Meta Job
+inserted by the previous two jobs, and will print the data to the terminal. The fourth Data Job will be a VDK DAG
 which will manage the other three and ensure that the third job runs only when the previous two finish successfully.
 
-The Meta Job uses a separate job input object separate from the one usually used for job
+The DAG uses a separate job input object separate from the one usually used for job
 operations in VDK Data Jobs and must be imported.
 
-The graph for our Meta Job will look like this:
-![Meta Job graph](images/metajob-graph.png)
+The graph for our DAG will look like this:
+![DAG graph](images/dag-graph.png)
 
 Before you continue, make sure you are familiar with the
 [Getting Started](https://github.com/vmware/versatile-data-kit/wiki/Getting-Started) section of the wiki.
@@ -23,9 +23,9 @@ Code
 The relevant Data Job code is available
 [here](https://github.com/vmware/versatile-data-kit/tree/main/examples).
 
-You can follow along and run this Meta Job on your machine;
+You can follow along and run this DAG on your machine;
 alternatively, you can use the available code as a template and extend it to
-make a Meta Job that fits your use case more closely.
+make a DAG that fits your use case more closely.
 
 Data
 --------
@@ -40,15 +40,15 @@ To run this example, you need
 * Versatile Data Kit
 * Trino DB
 * `vdk-trino` - VDK plugin for a connection to a Trino database
-* `vdk-meta-jobs` - VDK plugin for Meta Job functionality
+* `vdk-dag` - VDK plugin for DAG functionality
 
 Configuration
 -------------
 If you have not done so already, you can install Versatile Data Kit and the
 plugins required for this example by running the following commands from a terminal:
 ```console
 pip install quickstart-vdk
-pip install vdk-meta-jobs
+pip install vdk-dag
 ```
 Note that Versatile Data Kit requires Python 3.7+. See the
 [Installation page](https://github.com/vmware/versatile-data-kit/wiki/Installation#install-sdk) for more details.
@@ -75,7 +75,7 @@ vdk server --install
 Data Jobs
 --------
 
-Our three Datajobs have the following structure:
+Our three Data jobs have the following structure:
 
 ```
 ingest-job1/
@@ -90,7 +90,7 @@ ingest-job1/
     <summary>01_drop_table.sql</summary>
 
 ```sql
-drop table if exists memory.default.test_metajob_one
+drop table if exists memory.default.test_dag_one
 ```
 </details>
 
@@ -114,12 +114,12 @@ def run(job_input: IJobInput):
 
         rows = [tuple(i.values()) for i in data]
         insert_query = """
-        INSERT INTO memory.default.test_metajob_one VALUES
+        INSERT INTO memory.default.test_dag_one VALUES
         """ + ", ".join(str(i) for i in rows)
 
         job_input.execute_query(
             """
-            CREATE TABLE IF NOT EXISTS memory.default.test_metajob_one
+            CREATE TABLE IF NOT EXISTS memory.default.test_dag_one
             (
                 id varchar,
                 first_name varchar,
@@ -187,7 +187,7 @@ ingest-job2/
     <summary>01_drop_table.sql</summary>
 
 ```sql
-drop table if exists memory.default.test_metajob_two
+drop table if exists memory.default.test_dag_two
 ```
 </details>
 
@@ -211,12 +211,12 @@ def run(job_input: IJobInput):
 
         rows = [tuple(i.values()) for i in data]
         insert_query = """
-        INSERT INTO memory.default.test_metajob_two VALUES
+        INSERT INTO memory.default.test_dag_two VALUES
         """ + ", ".join(str(i) for i in rows)
 
         job_input.execute_query(
             """
-            CREATE TABLE IF NOT EXISTS memory.default.test_metajob_two
+            CREATE TABLE IF NOT EXISTS memory.default.test_dag_two
             (
                 id integer,
                 first_name varchar,
@@ -289,10 +289,10 @@ from vdk.api.job_input import IJobInput
 
 def run(job_input: IJobInput):
     job1_data = job_input.execute_query(
-        "SELECT * FROM memory.default.test_metajob_one"
+        "SELECT * FROM memory.default.test_dag_one"
     )
     job2_data = job_input.execute_query(
-        "SELECT * FROM memory.default.test_metajob_two"
+        "SELECT * FROM memory.default.test_dag_two"
     )
 
     print(
@@ -305,15 +305,15 @@ def run(job_input: IJobInput):
     <summary>20_drop_table_one.sql</summary>
 
 ```sql
-drop table if exists memory.default.test_metajob_one
+drop table if exists memory.default.test_dag_one
 ```
 </details>
 
 <details>
     <summary>30_drop_table_two.sql</summary>
 
 ```sql
-drop table if exists memory.default.test_metajob_two
+drop table if exists memory.default.test_dag_two
 ```
 </details>
 
@@ -347,48 +347,48 @@ vdk-trino
 </details>
 
 ```
-example-meta-job/
-├── example_meta_job.py
+example-dag/
+├── example_dag.py
 ├── config.ini
 ├── requirements.txt
 ```
 
 <details>
-    <summary>example_meta_job.py</summary>
+    <summary>example_dag.py</summary>
 
 ```python
-from vdk.plugin.meta_jobs.meta_job_runner import MetaJobInput
+from vdk.plugin.dag.dag_runner import DagInput
 
 
 JOBS_RUN_ORDER = [
     {
         "job_name": "ingest-job1",
         "team_name": "my-team",
-        "fail_meta_job_on_error": True,
+        "fail_dag_on_error": True,
         "depends_on": []
     },
 
     {
         "job_name": "ingest-job2",
         "team_name": "my-team",
-        "fail_meta_job_on_error": True,
+        "fail_dag_on_error": True,
         "depends_on": []
     },
     {
         "job_name": "read-data-job",
         "team_name": "my-team",
-        "fail_meta_job_on_error": True,
+        "fail_dag_on_error": True,
         "depends_on": ["ingest-job1", "ingest-job2"]
     },
 ]
 
 def run(job_input):
-    MetaJobInput().run_meta_job(JOBS_RUN_ORDER)
+    DagInput().run_dag(JOBS_RUN_ORDER)
 
 ```
 </details>
 
-Note that the `run_meta_job` method belongs to the `MetaJobInput` object which must be imported
+Note that the `run_dag` method belongs to the `DagInput` object which must be imported
 and instantiated separately from the default `IJobInput` object which is passed to the `run` function by default.
 
 <details>
@@ -412,12 +412,12 @@ team = my-team
     <summary>requirements.txt</summary>
 
 ```text
-vdk-meta-jobs
+vdk-dag
 ```
 </details>
 
-Note that the VDK Meta Job does not require the `vdk-trino` dependency.
-Component jobs are responsible for their own dependencies, and the Meta Job only handles their triggering.
+Note that the VDK DAG does not require the `vdk-trino` dependency.
+Component jobs are responsible for their own dependencies, and the DAG only handles their triggering.
 
 Execution
 ---------
@@ -430,30 +430,30 @@ folders that you have created, and type the following commands one by one:
 
 ```console
 vdk create -n ingest-job1 -t my-team --no-template -u http://localhost:8092 && \
-vdk deploy -n ingest-job1 -t my-team -p ingest-job1 -r "metajob-example" -u http://localhost:8092
+vdk deploy -n ingest-job1 -t my-team -p ingest-job1 -r "dag-example" -u http://localhost:8092
 ```
 
 ```console
 vdk create -n ingest-job2 -t my-team --no-template -u http://localhost:8092 && \
-vdk deploy -n ingest-job2 -t my-team -p ingest-job2 -r "metajob-example" -u http://localhost:8092
+vdk deploy -n ingest-job2 -t my-team -p ingest-job2 -r "dag-example" -u http://localhost:8092
 ```
 
 ```console
 vdk create -n read-job -t my-team --no-template -u http://localhost:8092 && \
-vdk deploy -n read-job -t my-team -p read-job -r "metajob-example" -u http://localhost:8092
+vdk deploy -n read-job -t my-team -p read-job -r "dag-example" -u http://localhost:8092
 ```
 
 ```console
-vdk create -n example-meta-job -t my-team --no-template -u http://localhost:8092 && \
-vdk deploy -n example-meta-job -t my-team -p example-meta-job -r "metajob-example" -u http://localhost:8092
+vdk create -n example-dag -t my-team --no-template -u http://localhost:8092 && \
+vdk deploy -n example-dag -t my-team -p example-dag -r "dag-example" -u http://localhost:8092
 ```
 
-You can now run your Meta Job through the Execution API by using the following command:
+You can now run your DAG through the Execution API by using the following command:
 ```console
-vdk execute --start -n example-meta-job -t my-team -u http://localhost:8092
+vdk execute --start -n example-dag -t my-team -u http://localhost:8092
 ```
 
-Alternatively, if you would like your Meta Job to run on a set schedule, you can configure
+Alternatively, if you would like your DAG to run on a set schedule, you can configure
 its cron schedule in its config.ini file as you would with any other Data Job.
 
 

examples/metajob-example/example-meta-job/example_meta_job.py → examples/dag-example/example-dag/example_dag.py

@@ -1,29 +1,29 @@
 # Copyright 2021-2023 VMware, Inc.
 # SPDX-License-Identifier: Apache-2.0
-from vdk.plugin.meta_jobs.meta_job_runner import MetaJobInput
+from vdk.plugin.dag.dag_runner import DagInput
 
 
 JOBS_RUN_ORDER = [
     {
         "job_name": "ingest-job1",
         "team_name": "my-team",
-        "fail_meta_job_on_error": True,
+        "fail_dag_on_error": True,
         "depends_on": [],
     },
     {
         "job_name": "ingest-job2",
         "team_name": "my-team",
-        "fail_meta_job_on_error": True,
+        "fail_dag_on_error": True,
         "depends_on": [],
     },
     {
         "job_name": "read-data-job",
         "team_name": "my-team",
-        "fail_meta_job_on_error": True,
+        "fail_dag_on_error": True,
         "depends_on": ["ingest-job1", "ingest-job2"],
     },
 ]
 
 
 def run(job_input):
-    MetaJobInput().run_meta_job(JOBS_RUN_ORDER)
+    DagInput().run_dag(JOBS_RUN_ORDER)

examples/dag-example/example-dag/requirements.txt

@@ -0,0 +1 @@
+vdk-dag

examples/dag-example/ingest-job1/01_drop_table.sql

@@ -0,0 +1 @@
+drop table if exists memory.default.test_dag_one

examples/metajob-example/ingest-job1/10_insert_data.py → examples/dag-example/ingest-job1/10_insert_data.py

@@ -16,14 +16,14 @@ def run(job_input: IJobInput):
 
         rows = [tuple(i.values()) for i in data]
         insert_query = """
-        INSERT INTO memory.default.test_metajob_one VALUES
+        INSERT INTO memory.default.test_dag_one VALUES
         """ + ", ".join(
             str(i) for i in rows
         )
 
         job_input.execute_query(
             """
-            CREATE TABLE IF NOT EXISTS memory.default.test_metajob_one
+            CREATE TABLE IF NOT EXISTS memory.default.test_dag_one
             (
                 id varchar,
                 first_name varchar,

examples/dag-example/ingest-job2/01_drop_table.sql

@@ -0,0 +1 @@
+drop table if exists memory.default.test_dag_two

examples/metajob-example/ingest-job2/10_insert_data.py → examples/dag-example/ingest-job2/10_insert_data.py

@@ -16,14 +16,14 @@ def run(job_input: IJobInput):
 
         rows = [tuple(i.values()) for i in data]
         insert_query = """
-        INSERT INTO memory.default.test_metajob_two VALUES
+        INSERT INTO memory.default.test_dag_two VALUES
         """ + ", ".join(
             str(i) for i in rows
         )
 
         job_input.execute_query(
             """
-            CREATE TABLE IF NOT EXISTS memory.default.test_metajob_two
+            CREATE TABLE IF NOT EXISTS memory.default.test_dag_two
             (
                 id integer,
                 first_name varchar,

examples/metajob-example/read-data-job/10_read.py → examples/dag-example/read-data-job/10_read.py

@@ -4,7 +4,7 @@
 
 
 def run(job_input: IJobInput):
-    job1_data = job_input.execute_query("SELECT * FROM memory.default.test_metajob_one")
-    job2_data = job_input.execute_query("SELECT * FROM memory.default.test_metajob_two")
+    job1_data = job_input.execute_query("SELECT * FROM memory.default.test_dag_one")
+    job2_data = job_input.execute_query("SELECT * FROM memory.default.test_dag_two")
 
     print(f"Job 1 Data ===> {job1_data} \n\n\n Job 2 Data ===> {job2_data}")

examples/dag-example/read-data-job/20_drop_table_one.sql

@@ -0,0 +1 @@
+drop table if exists memory.default.test_dag_one

examples/dag-example/read-data-job/30_drop_table_two.sql

@@ -0,0 +1 @@
+drop table if exists memory.default.test_dag_two

examples/dag-with-args-example/README.md

@@ -568,7 +568,7 @@ def run(job_input) -> None:
 ```
 </details>
 
-Note that the `run_dag` method belongs to the `DAGInput` object which must be imported
+Note that the `run_dag` method belongs to the `DagInput` object which must be imported
 and instantiated separately from the default `IJobInput` object which is passed to the `run` function by default.
 
 <details>
@@ -588,8 +588,8 @@ team = my-team
 
 [vdk]
 dags_max_concurrent_running_jobs = 2
-dags_delayed_jobs_min_delay_seconds = 1
 dags_delayed_jobs_randomized_added_delay_seconds = 1
+dags_delayed_jobs_min_delay_seconds = 1
 ```
 </details>
 
@@ -622,6 +622,18 @@ The other two configurations are set in order to have a short fixed delay for de
 Check the [configuration](https://github.com/vmware/versatile-data-kit/blob/main/projects/vdk-plugins/vdk-dag/src/vdk/plugin/dag/dag_plugin_configuration.py)
 for more details.
 
+<details>
+    <summary>requirements.txt</summary>
+
+```text
+vdk-dag
+```
+</details>
+
+Note that the VDK DAG Job does not require the `vdk-trino` dependency.
+Component jobs are responsible for their own dependencies, and the DAG Job only handles their triggering.
+
+
 ## Execution
 
 [Here](https://github.com/vmware/versatile-data-kit/tree/main/specs/vep-1243-vdk-dag#high-level-design) you can read

examples/dag-with-args-example/dag-job/config.ini

@@ -10,6 +10,6 @@
 team = my-team
 
 [vdk]
-meta_jobs_max_concurrent_running_jobs = 2
-meta_jobs_delayed_jobs_min_delay_seconds = 1
-meta_jobs_delayed_jobs_randomized_added_delay_seconds = 1
+dags_max_concurrent_running_jobs = 2
+dags_delayed_jobs_min_delay_seconds = 1
+dags_delayed_jobs_randomized_added_delay_seconds = 1