This commit introduces support for asynchronous return values thanks
to the new AsyncHandlerMethodReturnValueHandler interface. Out of
the box support for ListenableFuture is also provided.
Issue: SPR-12168
This change introduces SimpUserRegistry exposing an API to access
information about connected users, their sessions, and subscriptions
with STOMP/WebSocket messaging. Provides are methods to access users
as well as a method to find subscriptions given a Matcher strategy.
The DefaultSimpUserRegistry implementation is also a
SmartApplicationListener which listesn for ApplicationContext events
when users connect, disconnect, subscribe, and unsubscribe to
destinations.
The MultiServerUserRegistry implementation is a composite that
aggregates user information from the local SimpUserRegistry as well
as snapshots of user on remote application servers.
UserRegistryMessageHandler is used with MultiServerUserRegistry. It
broadcats user registry information through the broker and listens
for similar broadcasts from other servers. This must be enabled
explicitly when configuring the STOMP broker relay.
The existing UserSessionRegistry which was primiarly used internally
to resolve a user name to session id's has been deprecated and is no
longer used. If an application configures a custom UserSessionRegistr
still, it will be adapted accordingly to SimpUserRegistry but the
effect is rather limited (comparable to pre-existing functionality)
and will not work in multi-server scenarios.
Issue: SPR-12029
This commit introduces a messaging.converter.MessageConverter that
marshals to/from XML using the abstractions provided in the OXM module.
Issue: SPR-12726
This change adds support for broadcasting messages with unresolved
user destinations so that other servers can try to resolve it.
That enables sending messages to users who may be connected to a
different server.
Issue: SPR-11620
Revised HandlerMethod.getBeanType() impl for both web and messaging.
In addition, HandlerMethods get created with the internal BeanFactory now.
Issue: SPR-12832
This change adds support for global @MessageExceptionHandler methods
with STOMP over WebSocket messages. Such methods can be added to
@ControllerAdvice annotated components, much like @ExceptionHandler
methods for Spring MVC.
Issue: SPR-12696
WebSocketStompClient can be used with any implementation of
org.springframework.web.socket.client.WebSocketClient, which includes
org.springframework.web.socket.sockjs.client.SockJsClient.
Reactor11TcpStompClient can be used with reactor-net and provides STOMP
over TCP. It's also possible to adapt other WebSocket and TCP client
libraries (see StompClientSupport for more details).
For example usage see WebSocketStompClientIntegrationTests.
Issue: SPR-11588
Add support for annotation-based event listeners. Enabled automatically
when using Java configuration or can be enabled explicitly via the
regular <context:annotation-driven/> XML element. Detect methods of
managed beans annotated with @EventListener, either directly or through
a meta-annotation.
Annotated methods must define the event type they listen to as a single
parameter argument. Events are automatically filtered out according to
the method signature. When additional runtime filtering is required, one
can specify the `condition` attribute of the annotation that defines a
SpEL expression that should match to actually invoke the method for a
particular event. The root context exposes the actual `event`
(`#root.event`) and method arguments (`#root.args`). Individual method
arguments are also exposed via either the `a` or `p` alias (`#a0` refers
to the first method argument). Finally, methods arguments are exposed via
their names if that information can be discovered.
Events can be either an ApplicationEvent or any arbitrary payload. Such
payload is wrapped automatically in a PayloadApplicationEvent and managed
explicitly internally. As a result, users can now publish and listen
for arbitrary objects.
If an annotated method has a return value, an non null result is actually
published as a new event, something like:
@EventListener
public FooEvent handle(BarEvent event) { ... }
Events can be handled in an aynchronous manner by adding `@Async` to the
event method declaration and enabling such infrastructure. Events can
also be ordered by adding an `@Order` annotation to the event method.
Issue: SPR-11622
Sam Brannen
Juergen Hoeller
Rossen Stoyanchev
Sebastien Deleuze
Stephane Nicoll
Arjen Poutsma
Stephane Maldini