Support SendTo at class-level

Issue: SPR-13578

src/asciidoc/integration.adoc

@@ -2796,6 +2796,9 @@ as follow to automatically send a response:
 	}
 ----
 
+TIP: If you have several `@JmsListener`-annotated methods, you can also place the `@SendTo`
+annotation at class-level to share a default reply destination.
+
 If you need to set additional headers in a transport-independent manner, you could return a
 `Message` instead, something like:
 

src/asciidoc/web-websocket.adoc

@@ -1359,7 +1359,8 @@ The return value from an `@MessageMapping` method is converted with a
 of a new message that is then sent, by default, to the `"brokerChannel"` with
 the same destination as the client message but using the prefix `"/topic"` by
 default. An `@SendTo` message level annotation can be used to specify any
-other destination instead.
+other destination instead. It can also be set a class-level to share a common
+destination.
 
 An `@SubscribeMapping` annotation can also be used to map subscription requests
 to `@Controller` methods. It is supported on the method level, but can also be

src/asciidoc/whats-new.adoc

@@ -650,12 +650,20 @@ Spring 4.3 also improves the caching abstraction as follows:
 * `ConcurrentMapCacheManager` and `ConcurrentMapCache` now support the serialization
   of cache entries via a new `storeByValue` attribute.
 
+=== JMS Improvements
+
+* `@SendTo` can now be specified at class-level to share a common reply destination.
+
 === Web Improvements
 
 * New `@RestControllerAdvice` annotation combines `@ControllerAdvice` with `@ResponseBody`.
 * `@ResponseStatus` can be used on a controller type is inherited for all method.
 * `AsyncRestTemplate` supports request interception.
 
+=== WebSocket Messaging Improvements
+
+* `@SendTo` can now be specified at class-level to share a common destination.
+
 === Testing Improvements
 
 * The JUnit support in the _Spring TestContext Framework_ now requires JUnit 4.12 or higher.