Remove @UnsubscribeEvent

The STOMP UNSUBSCRIBE message does not have a destination header so
there is no obvious simple way to do a mapping and the need for it
is not clear yet.

spring-messaging/src/main/java/org/springframework/messaging/simp/annotation/UnsubscribeEvent.java

-/*
- * Copyright 2002-2013 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.messaging.simp.annotation;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-
-/**
- * Annotation for mapping unsubscribe events onto specific handler methods based
- * on the destination for the message (e.g. STOMP UNSUBSCRIBE message).
- *
- * @author Rossen Stoyanchev
- * @since 4.0
- */
-@Target({ElementType.TYPE, ElementType.METHOD})
-@Retention(RetentionPolicy.RUNTIME)
-@Documented
-public @interface UnsubscribeEvent {
-
-	/**
-	 * Destination value(s) for the subscription.
-	 */
-	String[] value() default {};
-
-}

spring-messaging/src/main/java/org/springframework/messaging/simp/handler/AnnotationMethodMessageHandler.java

@@ -65,7 +65,6 @@ import org.springframework.messaging.simp.SimpMessageSendingOperations;
 import org.springframework.messaging.simp.SimpMessageType;
 import org.springframework.messaging.simp.SimpMessagingTemplate;
 import org.springframework.messaging.simp.annotation.SubscribeEvent;
-import org.springframework.messaging.simp.annotation.UnsubscribeEvent;
 import org.springframework.messaging.simp.annotation.support.PrincipalMethodArgumentResolver;
 import org.springframework.messaging.simp.annotation.support.SendToMethodReturnValueHandler;
 import org.springframework.messaging.simp.annotation.support.SubscriptionMethodReturnValueHandler;
@@ -120,8 +119,6 @@ public class AnnotationMethodMessageHandler implements MessageHandler, Applicati
 
 	private Map<MappingInfo, HandlerMethod> subscribeMethods = new HashMap<MappingInfo, HandlerMethod>();
 
-	private Map<MappingInfo, HandlerMethod> unsubscribeMethods = new HashMap<MappingInfo, HandlerMethod>();
-
 	private final Map<Class<?>, ExceptionHandlerMethodResolver> exceptionHandlerCache =
 			new ConcurrentHashMap<Class<?>, ExceptionHandlerMethodResolver>(64);
 
@@ -308,7 +305,6 @@ public class AnnotationMethodMessageHandler implements MessageHandler, Applicati
 
 		initHandlerMethods(handler, handlerType, MessageMapping.class, this.messageMethods);
 		initHandlerMethods(handler, handlerType, SubscribeEvent.class, this.subscribeMethods);
-		initHandlerMethods(handler, handlerType, UnsubscribeEvent.class, this.unsubscribeMethods);
 	}
 
 	private <A extends Annotation> void initHandlerMethods(Object handler, Class<?> handlerType,
@@ -365,9 +361,6 @@ public class AnnotationMethodMessageHandler implements MessageHandler, Applicati
 		else if (SimpMessageType.SUBSCRIBE.equals(messageType)) {
 			handleMessageInternal(message, this.subscribeMethods);
 		}
-		else if (SimpMessageType.UNSUBSCRIBE.equals(messageType)) {
-			handleMessageInternal(message, this.unsubscribeMethods);
-		}
 	}
 
 	private void handleMessageInternal(Message<?> message, Map<MappingInfo, HandlerMethod> handlerMethods) {