Upgrade to Java7

build.gradle

@@ -19,6 +19,9 @@ subprojects {
     apply plugin: 'nebula.netflixoss'
     apply plugin: 'java'
     apply plugin: 'nebula.provided-base'
+
+    sourceCompatibility = 1.7
+    targetCompatibility = 1.7
 
     repositories {
         jcenter()

hystrix-contrib/hystrix-javanica/src/main/java/com/netflix/hystrix/contrib/javanica/cache/CacheInvocationContextFactory.java

@@ -44,7 +44,7 @@ public static CacheInvocationContext<CacheResult> createCacheResultInvocationCon
             Method method = metaHolder.getMethod();
             CacheResult cacheResult = method.getAnnotation(CacheResult.class);
             MethodExecutionAction cacheKeyMethod = createCacheKeyAction(cacheResult.cacheKeyMethod(), metaHolder);
-            return new CacheInvocationContext<CacheResult>(cacheResult, cacheKeyMethod, metaHolder.getObj(), method, metaHolder.getArgs());
+            return new CacheInvocationContext<>(cacheResult, cacheKeyMethod, metaHolder.getObj(), method, metaHolder.getArgs());
         }
         return null;
     }
@@ -60,7 +60,7 @@ public static CacheInvocationContext<CacheRemove> createCacheRemoveInvocationCon
             Method method = metaHolder.getMethod();
             CacheRemove cacheRemove = method.getAnnotation(CacheRemove.class);
             MethodExecutionAction cacheKeyMethod = createCacheKeyAction(cacheRemove.cacheKeyMethod(), metaHolder);
-            return new CacheInvocationContext<CacheRemove>(cacheRemove, cacheKeyMethod, metaHolder.getObj(), method, metaHolder.getArgs());
+            return new CacheInvocationContext<>(cacheRemove, cacheKeyMethod, metaHolder.getObj(), method, metaHolder.getArgs());
         }
         return null;
     }

hystrix-contrib/hystrix-javanica/src/main/java/com/netflix/hystrix/contrib/javanica/cache/HystrixCacheKeyGenerator.java

@@ -87,11 +87,7 @@ private Object getPropertyValue(String name, Object obj) throws HystrixCacheKeyG
         try {
             return new PropertyDescriptor(name, obj.getClass())
                     .getReadMethod().invoke(obj);
-        } catch (IllegalAccessException e) {
-            throw new HystrixCacheKeyGenerationException(e);
-        } catch (InvocationTargetException e) {
-            throw new HystrixCacheKeyGenerationException(e);
-        } catch (IntrospectionException e) {
+        } catch (IllegalAccessException | IntrospectionException | InvocationTargetException e) {
             throw new HystrixCacheKeyGenerationException(e);
         }
     }

hystrix-contrib/hystrix-javanica/src/main/java/com/netflix/hystrix/contrib/javanica/command/MethodExecutionAction.java

@@ -99,9 +99,7 @@ private Object execute(Object o, Method m, Object... args) throws CommandActionE
         try {
             m.setAccessible(true); // suppress Java language access
             result = m.invoke(o, args);
-        } catch (IllegalAccessException e) {
-            propagateCause(e);
-        } catch (InvocationTargetException e) {
+        } catch (IllegalAccessException | InvocationTargetException e) {
             propagateCause(e);
         }
         return result;

hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/cache/CacheTest.java

@@ -257,7 +257,7 @@ public void testGetUserByName_givenNonexistentCacheKeyMethod_shouldThrowExceptio
     }
 
     public static class UserService {
-        private Map<String, User> storage = new ConcurrentHashMap<String, User>();
+        private Map<String, User> storage = new ConcurrentHashMap<>();
 
         @PostConstruct
         private void init() {

hystrix-contrib/hystrix-javanica/src/test/java/com/netflix/hystrix/contrib/javanica/test/spring/error/ErrorPropagationTest.java

@@ -38,7 +38,7 @@ public class ErrorPropagationTest {
     private static final Map<String, User> USERS;
 
     static {
-        USERS = new HashMap<String, User>();
+        USERS = new HashMap<>();
         USERS.put("1", new User("1", "user_1"));
         USERS.put("2", new User("2", "user_2"));
         USERS.put("3", new User("3", "user_3"));

hystrix-contrib/hystrix-metrics-event-stream/src/main/java/com/netflix/hystrix/contrib/metrics/eventstream/HystrixMetricsStreamServlet.java

@@ -203,7 +203,7 @@ private static class MetricJsonListener implements HystrixMetricsPoller.MetricsA
          * <p>
          * This is a safety check against a runaway poller causing memory leaks.
          */
-        private final LinkedBlockingQueue<String> jsonMetrics = new LinkedBlockingQueue<String>(1000);
+        private final LinkedBlockingQueue<String> jsonMetrics = new LinkedBlockingQueue<>(1000);
 
         /**
          * Store JSON messages in a queue.
@@ -219,7 +219,7 @@ public void handleJsonMetric(String json) {
          * @return
          */
         public List<String> getJsonMetrics() {
-            ArrayList<String> metrics = new ArrayList<String>();
+            ArrayList<String> metrics = new ArrayList<>();
             jsonMetrics.drainTo(metrics);
             return metrics;
         }

hystrix-contrib/hystrix-rx-netty-metrics-stream/src/test/java/com/netflix/hystrix/contrib/rxnetty/metricsstream/HystrixMetricsStreamHandlerTest.java

@@ -100,7 +100,7 @@ private HttpServer<ByteBuf, ByteBuf> createServer() {
         for (int i = 0; i < 3 && server == null; i++) {
             port = 10000 + random.nextInt(50000);
             try {
-                return RxNetty.newHttpServerBuilder(port, new HystrixMetricsStreamHandler<ByteBuf, ByteBuf>(
+                return RxNetty.newHttpServerBuilder(port, new HystrixMetricsStreamHandler<>(
                         DEFAULT_HYSTRIX_PREFIX,
                         DEFAULT_INTERVAL,
                         new RequestHandler<ByteBuf, ByteBuf>() {  // Application handler

hystrix-contrib/hystrix-servo-metrics-publisher/src/main/java/com/netflix/hystrix/contrib/servopublisher/HystrixServoMetricsPublisherCollapser.java

@@ -111,7 +111,7 @@ protected Tag getServoInstanceTag() {
      */
     private List<Monitor<?>> getServoMonitors() {
 
-        List<Monitor<?>> monitors = new ArrayList<Monitor<?>>();
+        List<Monitor<?>> monitors = new ArrayList<>();
 
         monitors.add(new InformationalMetric<String>(MonitorConfig.builder("name").build()) {
             @Override

hystrix-contrib/hystrix-servo-metrics-publisher/src/main/java/com/netflix/hystrix/contrib/servopublisher/HystrixServoMetricsPublisherCommand.java

@@ -116,7 +116,7 @@ protected Tag getServoInstanceTag() {
      */
     private List<Monitor<?>> getServoMonitors() {
 
-        List<Monitor<?>> monitors = new ArrayList<Monitor<?>>();
+        List<Monitor<?>> monitors = new ArrayList<>();
 
         monitors.add(new InformationalMetric<Boolean>(MonitorConfig.builder("isCircuitBreakerOpen").build()) {
             @Override

hystrix-contrib/hystrix-servo-metrics-publisher/src/main/java/com/netflix/hystrix/contrib/servopublisher/HystrixServoMetricsPublisherThreadPool.java

@@ -111,7 +111,7 @@ protected Tag getServoInstanceTag() {
      */
     private List<Monitor<?>> getServoMonitors() {
 
-        List<Monitor<?>> monitors = new ArrayList<Monitor<?>>();
+        List<Monitor<?>> monitors = new ArrayList<>();
 
         monitors.add(new InformationalMetric<String>(MonitorConfig.builder("name").build()) {
             @Override

hystrix-core/src/main/java/com/netflix/hystrix/AbstractCommand.java

@@ -87,16 +87,16 @@ protected static enum TimedOutStatus {
     /* FALLBACK Semaphore */
     protected final TryableSemaphore fallbackSemaphoreOverride;
     /* each circuit has a semaphore to restrict concurrent fallback execution */
-    protected static final ConcurrentHashMap<String, TryableSemaphore> fallbackSemaphorePerCircuit = new ConcurrentHashMap<String, TryableSemaphore>();
+    protected static final ConcurrentHashMap<String, TryableSemaphore> fallbackSemaphorePerCircuit = new ConcurrentHashMap<>();
     /* END FALLBACK Semaphore */
 
     /* EXECUTION Semaphore */
     protected final TryableSemaphore executionSemaphoreOverride;
     /* each circuit has a semaphore to restrict concurrent fallback execution */
-    protected static final ConcurrentHashMap<String, TryableSemaphore> executionSemaphorePerCircuit = new ConcurrentHashMap<String, TryableSemaphore>();
+    protected static final ConcurrentHashMap<String, TryableSemaphore> executionSemaphorePerCircuit = new ConcurrentHashMap<>();
     /* END EXECUTION Semaphore */
 
-    protected final AtomicReference<Reference<TimerListener>> timeoutTimer = new AtomicReference<Reference<TimerListener>>();
+    protected final AtomicReference<Reference<TimerListener>> timeoutTimer = new AtomicReference<>();
 
     protected AtomicBoolean started = new AtomicBoolean();
     protected volatile long invocationStartTime = -1;
@@ -105,10 +105,10 @@ protected static enum TimedOutStatus {
     protected volatile ExecutionResult executionResult = ExecutionResult.EMPTY;
 
     /* If this command executed and timed-out */
-    protected final AtomicReference<TimedOutStatus> isCommandTimedOut = new AtomicReference<TimedOutStatus>(TimedOutStatus.NOT_EXECUTED);
+    protected final AtomicReference<TimedOutStatus> isCommandTimedOut = new AtomicReference<>(TimedOutStatus.NOT_EXECUTED);
     protected final AtomicBoolean isExecutionComplete = new AtomicBoolean(false);
     protected final AtomicBoolean isExecutedInThread = new AtomicBoolean(false);
-    protected final AtomicReference<Action0> endCurrentThreadExecutingCommand = new AtomicReference<Action0>(); // don't like how this is being done
+    protected final AtomicReference<Action0> endCurrentThreadExecutingCommand = new AtomicReference<>(); // don't like how this is being done
 
 
     /**
@@ -119,7 +119,7 @@ protected static enum TimedOutStatus {
 
     // this is a micro-optimization but saves about 1-2microseconds (on 2011 MacBook Pro) 
     // on the repetitive string processing that will occur on the same classes over and over again
-    private static ConcurrentHashMap<Class<?>, String> defaultNameCache = new ConcurrentHashMap<Class<?>, String>();
+    private static ConcurrentHashMap<Class<?>, String> defaultNameCache = new ConcurrentHashMap<>();
 
     /* package */static String getDefaultNameFromClass(Class<?> cls) {
         String fromCache = defaultNameCache.get(cls);
@@ -358,7 +358,7 @@ protected ObservableCommand<R> toObservable(final boolean performAsyncTimeout) {
             if (fromCache != null) {
                 /* mark that we received this response from cache */
                 metrics.markResponseFromCache();
-                return new CachedObservableResponse<R>((CachedObservableOriginal<R>) fromCache, this);
+                return new CachedObservableResponse<>((CachedObservableOriginal<R>) fromCache, this);
             }
         }
 
@@ -478,17 +478,17 @@ public void call() {
         // put in cache
         if (isRequestCachingEnabled()) {
             // wrap it for caching
-            o = new CachedObservableOriginal<R>(o.cache(), this);
+            o = new CachedObservableOriginal<>(o.cache(), this);
             Observable<R> fromCache = requestCache.putIfAbsent(getCacheKey(), o);
             if (fromCache != null) {
                 // another thread beat us so we'll use the cached value instead
-                o = new CachedObservableResponse<R>((CachedObservableOriginal<R>) fromCache, this);
+                o = new CachedObservableResponse<>((CachedObservableOriginal<R>) fromCache, this);
             }
             // we just created an ObservableCommand so we cast and return it
             return (ObservableCommand<R>) o;
         } else {
             // no request caching so a simple wrapper just to pass 'this' along with the Observable
-            return new ObservableCommand<R>(o, this);
+            return new ObservableCommand<>(o, this);
         }
     }
 
@@ -556,7 +556,7 @@ public void call(Notification<? super R> n) {
                 setRequestContextIfNeeded(currentRequestContext);
             }
 
-        }).lift(new HystrixObservableTimeoutOperator<R>(_self, performAsyncTimeout)).map(new Func1<R, R>() {
+        }).lift(new HystrixObservableTimeoutOperator<>(_self, performAsyncTimeout)).map(new Func1<R, R>() {
 
             boolean once = false;
 
@@ -967,7 +967,7 @@ public int getIntervalTimeInMilliseconds() {
                  * This allows the blocking and non-blocking approaches to be coded basically the same way
                  * though it is admittedly awkward if we were just blocking (the use of Reference annoys me for example)
                  */
-                _tl = new SoftReference<TimerListener>(listener);
+                _tl = new SoftReference<>(listener);
             }
             final Reference<TimerListener> tl = _tl;
 
@@ -1463,7 +1463,7 @@ private ExecutionResult(List<HystrixEventType> events, int executionTime, Except
          * @return
          */
         public ExecutionResult addEvents(HystrixEventType... events) {
-            ArrayList<HystrixEventType> newEvents = new ArrayList<HystrixEventType>();
+            ArrayList<HystrixEventType> newEvents = new ArrayList<>();
             newEvents.addAll(this.events);
             for (HystrixEventType e : events) {
                 newEvents.add(e);

hystrix-core/src/main/java/com/netflix/hystrix/Hystrix.java

@@ -67,7 +67,7 @@ private static void _reset() {
     private static ThreadLocal<LinkedList<HystrixCommandKey>> currentCommand = new ThreadLocal<LinkedList<HystrixCommandKey>>() {
         @Override
         protected LinkedList<HystrixCommandKey> initialValue() {
-            return new LinkedList<HystrixCommandKey>();
+            return new LinkedList<>();
         }
     };
 

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCircuitBreaker.java

@@ -55,7 +55,7 @@ public interface HystrixCircuitBreaker {
      */
     public static class Factory {
         // String is HystrixCommandKey.name() (we can't use HystrixCommandKey directly as we can't guarantee it implements hashcode/equals correctly)
-        private static ConcurrentHashMap<String, HystrixCircuitBreaker> circuitBreakersByCommand = new ConcurrentHashMap<String, HystrixCircuitBreaker>();
+        private static ConcurrentHashMap<String, HystrixCircuitBreaker> circuitBreakersByCommand = new ConcurrentHashMap<>();
 
         /**
          * Get the {@link HystrixCircuitBreaker} instance for a given {@link HystrixCommandKey}.

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCollapser.java

@@ -126,7 +126,7 @@ protected HystrixCollapser(Setter setter) {
         }
 
         HystrixCollapserProperties properties = HystrixPropertiesFactory.getCollapserProperties(collapserKey, propertiesBuilder);
-        this.collapserFactory = new RequestCollapserFactory<BatchReturnType, ResponseType, RequestArgumentType>(collapserKey, scope, timer, properties);
+        this.collapserFactory = new RequestCollapserFactory<>(collapserKey, scope, timer, properties);
         this.requestCache = HystrixRequestCache.getInstance(collapserKey, HystrixPlugins.getInstance().getConcurrencyStrategy());
 
         if (metrics == null) {
@@ -593,6 +593,6 @@ public Setter andCollapserPropertiesDefaults(HystrixCollapserProperties.Setter p
     // this is a micro-optimization but saves about 1-2microseconds (on 2011 MacBook Pro) 
     // on the repetitive string processing that will occur on the same classes over and over again
     @SuppressWarnings("rawtypes")
-    private static ConcurrentHashMap<Class<? extends HystrixCollapser>, String> defaultNameCache = new ConcurrentHashMap<Class<? extends HystrixCollapser>, String>();
+    private static ConcurrentHashMap<Class<? extends HystrixCollapser>, String> defaultNameCache = new ConcurrentHashMap<>();
 
 }

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCollapserKey.java

@@ -37,7 +37,7 @@ private Factory() {
         }
 
         // used to intern instances so we don't keep re-creating them millions of times for the same key
-        private static ConcurrentHashMap<String, HystrixCollapserKey> intern = new ConcurrentHashMap<String, HystrixCollapserKey>();
+        private static ConcurrentHashMap<String, HystrixCollapserKey> intern = new ConcurrentHashMap<>();
 
         /**
          * Retrieve (or create) an interned HystrixCollapserKey instance for a given name.

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCollapserMetrics.java

@@ -36,7 +36,7 @@ public class HystrixCollapserMetrics extends HystrixMetrics {
     private static final Logger logger = LoggerFactory.getLogger(HystrixCollapserMetrics.class);
 
     // String is HystrixCollapserKey.name() (we can't use HystrixCollapserKey directly as we can't guarantee it implements hashcode/equals correctly)
-    private static final ConcurrentHashMap<String, HystrixCollapserMetrics> metrics = new ConcurrentHashMap<String, HystrixCollapserMetrics>();
+    private static final ConcurrentHashMap<String, HystrixCollapserMetrics> metrics = new ConcurrentHashMap<>();
 
     /**
      * Get or create the {@link HystrixCollapserMetrics} instance for a given {@link HystrixCollapserKey}.

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCommandGroupKey.java

@@ -39,7 +39,7 @@ private Factory() {
         }
 
         // used to intern instances so we don't keep re-creating them millions of times for the same key
-        private static ConcurrentHashMap<String, HystrixCommandGroupKey> intern = new ConcurrentHashMap<String, HystrixCommandGroupKey>();
+        private static ConcurrentHashMap<String, HystrixCommandGroupKey> intern = new ConcurrentHashMap<>();
 
         /**
          * Retrieve (or create) an interned HystrixCommandGroup instance for a given name.

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCommandKey.java

@@ -37,7 +37,7 @@ private Factory() {
         }
 
         // used to intern instances so we don't keep re-creating them millions of times for the same key
-        private static ConcurrentHashMap<String, HystrixCommandKey> intern = new ConcurrentHashMap<String, HystrixCommandKey>();
+        private static ConcurrentHashMap<String, HystrixCommandKey> intern = new ConcurrentHashMap<>();
 
         /**
          * Retrieve (or create) an interned HystrixCommandKey instance for a given name.

hystrix-core/src/main/java/com/netflix/hystrix/HystrixCommandMetrics.java

@@ -41,7 +41,7 @@ public class HystrixCommandMetrics extends HystrixMetrics {
     private static final Logger logger = LoggerFactory.getLogger(HystrixCommandMetrics.class);
 
     // String is HystrixCommandKey.name() (we can't use HystrixCommandKey directly as we can't guarantee it implements hashcode/equals correctly)
-    private static final ConcurrentHashMap<String, HystrixCommandMetrics> metrics = new ConcurrentHashMap<String, HystrixCommandMetrics>();
+    private static final ConcurrentHashMap<String, HystrixCommandMetrics> metrics = new ConcurrentHashMap<>();
 
     /**
      * Get or create the {@link HystrixCommandMetrics} instance for a given {@link HystrixCommandKey}.

hystrix-core/src/main/java/com/netflix/hystrix/HystrixObservableCollapser.java

@@ -121,7 +121,7 @@ protected HystrixObservableCollapser(Setter setter) {
             collapserKey = HystrixCollapserKey.Factory.asKey(defaultKeyName);
         }
 
-        this.collapserFactory = new RequestCollapserFactory<BatchReturnType, ResponseType, RequestArgumentType>(collapserKey, scope, timer, propertiesBuilder);
+        this.collapserFactory = new RequestCollapserFactory<>(collapserKey, scope, timer, propertiesBuilder);
         this.requestCache = HystrixRequestCache.getInstance(collapserKey, HystrixPlugins.getInstance().getConcurrencyStrategy());
 
         final HystrixObservableCollapser<K, BatchReturnType, ResponseType, RequestArgumentType> self = this;
@@ -153,7 +153,7 @@ public Observable<Void> mapResponseToRequests(Observable<BatchReturnType> batchR
                 final Func1<BatchReturnType, ResponseType> mapBatchTypeToResponseType = self.getBatchReturnTypeToResponseTypeMapper();
 
                 // index the requests by key
-                final Map<K, CollapsedRequest<ResponseType, RequestArgumentType>> requestsByKey = new HashMap<K, CollapsedRequest<ResponseType, RequestArgumentType>>(requests.size());
+                final Map<K, CollapsedRequest<ResponseType, RequestArgumentType>> requestsByKey = new HashMap<>(requests.size());
                 for (CollapsedRequest<ResponseType, RequestArgumentType> cr : requests) {
                     requestsByKey.put(requestKeySelector.call(cr.getArgument()), cr);
                 }
@@ -510,6 +510,6 @@ public Setter andCollapserPropertiesDefaults(HystrixCollapserProperties.Setter p
     // this is a micro-optimization but saves about 1-2microseconds (on 2011 MacBook Pro) 
     // on the repetitive string processing that will occur on the same classes over and over again
     @SuppressWarnings("rawtypes")
-    private static ConcurrentHashMap<Class<? extends HystrixObservableCollapser>, String> defaultNameCache = new ConcurrentHashMap<Class<? extends HystrixObservableCollapser>, String>();
+    private static ConcurrentHashMap<Class<? extends HystrixObservableCollapser>, String> defaultNameCache = new ConcurrentHashMap<>();
 
 }