Publish delete events by repository methods deleteInBatch and deleteAllInBatch methods.

We now publish events from deleteInBatch and deleteAllInBatch methods to consider well-known repository methods.
We also now prevent event publication if the method argument is not an instance of the domain type.

Closes: #2448.

src/main/java/org/springframework/data/repository/core/support/EventPublishingRepositoryProxyPostProcessor.java

@@ -129,7 +129,8 @@ public class EventPublishingRepositoryProxyPostProcessor implements RepositoryPr
 	}
 
 	private static boolean isDeleteMethod(String methodName) {
-		return methodName.equals("delete") || methodName.equals("deleteAll");
+		return methodName.equals("delete") || methodName.equals("deleteAll") || methodName.equals("deleteInBatch")
+				|| methodName.equals("deleteAllInBatch");
 	}
 
 	/**
@@ -141,13 +142,16 @@ public class EventPublishingRepositoryProxyPostProcessor implements RepositoryPr
 	static class EventPublishingMethod {
 
 		private static Map<Class<?>, EventPublishingMethod> cache = new ConcurrentReferenceHashMap<>();
-		private static @SuppressWarnings("null") EventPublishingMethod NONE = new EventPublishingMethod(null, null);
+		private static @SuppressWarnings("null") EventPublishingMethod NONE = new EventPublishingMethod(Object.class, null,
+				null);
 
+		private final Class<?> type;
 		private final Method publishingMethod;
 		private final @Nullable Method clearingMethod;
 
-		EventPublishingMethod(Method publishingMethod, Method clearingMethod) {
+		EventPublishingMethod(Class<?> type, Method publishingMethod, @Nullable Method clearingMethod) {
 
+			this.type = type;
 			this.publishingMethod = publishingMethod;
 			this.clearingMethod = clearingMethod;
 		}
@@ -170,7 +174,7 @@ public class EventPublishingRepositoryProxyPostProcessor implements RepositoryPr
 				return eventPublishingMethod.orNull();
 			}
 
-			EventPublishingMethod result = from(getDetector(type, DomainEvents.class),
+			EventPublishingMethod result = from(type, getDetector(type, DomainEvents.class),
 					() -> getDetector(type, AfterDomainEventPublication.class));
 
 			cache.put(type, result);
@@ -192,6 +196,10 @@ public class EventPublishingRepositoryProxyPostProcessor implements RepositoryPr
 
 			for (Object aggregateRoot : asCollection(object)) {
 
+				if (!type.isInstance(aggregateRoot)) {
+					continue;
+				}
+
 				for (Object event : asCollection(ReflectionUtils.invokeMethod(publishingMethod, aggregateRoot))) {
 					publisher.publishEvent(event);
 				}
@@ -229,7 +237,7 @@ public class EventPublishingRepositoryProxyPostProcessor implements RepositoryPr
 		 * @param clearing must not be {@literal null}.
 		 * @return
 		 */
-		private static EventPublishingMethod from(AnnotationDetectionMethodCallback<?> publishing,
+		private static EventPublishingMethod from(Class<?> type, AnnotationDetectionMethodCallback<?> publishing,
 				Supplier<AnnotationDetectionMethodCallback<?>> clearing) {
 
 			if (!publishing.hasFoundAnnotation()) {
@@ -239,7 +247,7 @@ public class EventPublishingRepositoryProxyPostProcessor implements RepositoryPr
 			Method eventMethod = publishing.getRequiredMethod();
 			ReflectionUtils.makeAccessible(eventMethod);
 
-			return new EventPublishingMethod(eventMethod, getClearingMethod(clearing.get()));
+			return new EventPublishingMethod(type, eventMethod, getClearingMethod(clearing.get()));
 		}
 
 		/**

src/test/java/org/springframework/data/repository/core/support/EventPublishingRepositoryProxyPostProcessorUnitTests.java

@@ -127,7 +127,7 @@ class EventPublishingRepositoryProxyPostProcessorUnitTests {
 	}
 
 	@Test // DATACMNS-1663
-	public void interceptsDeleteMethod() throws Throwable {
+	void interceptsDeleteMethod() throws Throwable {
 		SomeEvent event = new SomeEvent();
 		MultipleEvents sample = MultipleEvents.of(Collections.singletonList(event));
 		mockInvocation(invocation, SampleRepository.class.getMethod("delete", Object.class), sample);
@@ -152,7 +152,7 @@ class EventPublishingRepositoryProxyPostProcessorUnitTests {
 	}
 
 	@Test // DATACMNS-1663
-	public void doesNotInterceptDeleteByIdMethod() throws Throwable {
+	void doesNotInterceptDeleteByIdMethod() throws Throwable {
 
 		doReturn(SampleRepository.class.getMethod("deleteById", Object.class)).when(invocation).getMethod();
 
@@ -204,7 +204,7 @@ class EventPublishingRepositoryProxyPostProcessorUnitTests {
 	}
 
 	@Test // DATACMNS-1663
-	public void publishesEventsForCallToDeleteWithIterable() throws Throwable {
+	void publishesEventsForCallToDeleteWithIterable() throws Throwable {
 
 		SomeEvent event = new SomeEvent();
 		MultipleEvents sample = MultipleEvents.of(Collections.singletonList(event));
@@ -217,6 +217,34 @@ class EventPublishingRepositoryProxyPostProcessorUnitTests {
 		verify(publisher).publishEvent(any(SomeEvent.class));
 	}
 
+	@Test // GH-2448
+	void publishesEventsForCallToDeleteInBatchWithIterable() throws Throwable {
+
+		SomeEvent event = new SomeEvent();
+		MultipleEvents sample = MultipleEvents.of(Collections.singletonList(event));
+		mockInvocation(invocation, SampleRepository.class.getMethod("deleteInBatch", Iterable.class), sample);
+
+		EventPublishingMethodInterceptor//
+				.of(EventPublishingMethod.of(MultipleEvents.class), publisher)//
+				.invoke(invocation);
+
+		verify(publisher).publishEvent(any(SomeEvent.class));
+	}
+
+	@Test // GH-2448
+	void publishesEventsForCallToDeleteAllInBatchWithIterable() throws Throwable {
+
+		SomeEvent event = new SomeEvent();
+		MultipleEvents sample = MultipleEvents.of(Collections.singletonList(event));
+		mockInvocation(invocation, SampleRepository.class.getMethod("deleteAllInBatch", Iterable.class), sample);
+
+		EventPublishingMethodInterceptor//
+				.of(EventPublishingMethod.of(MultipleEvents.class), publisher)//
+				.invoke(invocation);
+
+		verify(publisher).publishEvent(any(SomeEvent.class));
+	}
+
 	@Test // DATACMNS-975
 	void publishesEventsAfterSaveInvocation() throws Throwable {
 
@@ -294,6 +322,17 @@ class EventPublishingRepositoryProxyPostProcessorUnitTests {
 		verify(publisher, times(1)).publishEvent(event);
 	}
 
+	@Test // GH-2448
+	void doesNotEmitEventsFromPrimitiveValue() throws Throwable {
+
+		Method method = SampleRepository.class.getMethod("delete", Object.class);
+		mockInvocation(invocation, method, "foo", MultipleEvents.of(Collections.emptySet()));
+
+		EventPublishingMethodInterceptor.of(EventPublishingMethod.of(MultipleEvents.class), publisher).invoke(invocation);
+
+		verify(publisher, never()).publishEvent(any());
+	}
+
 	private static void mockInvocation(MethodInvocation invocation, Method method, Object parameterAndReturnValue)
 			throws Throwable {
 
@@ -322,17 +361,23 @@ class EventPublishingRepositoryProxyPostProcessorUnitTests {
 	}
 
 	@Value(staticConstructor = "of")
-	static class OneEvent {
+	private static class OneEvent {
 		@Getter(onMethod = @__(@DomainEvents)) Object event;
 	}
 
 	@Value
-	static class SomeEvent {
+	private static class SomeEvent {
 		UUID id = UUID.randomUUID();
 	}
 
 	interface SampleRepository extends CrudRepository<MultipleEvents, Long> {
 
 		MultipleEvents saveAndFlush(MultipleEvents events);
+
+		MultipleEvents delete(String name);
+
+		MultipleEvents deleteAllInBatch(Iterable<MultipleEvents> events);
+
+		MultipleEvents deleteInBatch(Iterable<MultipleEvents> events);
 	}
 }