Subscribing to spring-websocket messages internally - spring

Question

I am using spring-websocket to push messages to browser clients.
My setup is almost identical to the one in the portfolio example and I send out messages by using MessageSendingOperations:
MessageSendingOperations<String> messagingTemplate = //...;
this.messagingTemplate.convertAndSend("/topic/data/1", message);
This works perfectly.
But I would also like to be able to subscribe to the same messages internally.
MessageReceivingOperations almost looks like the one to use, but it only seems to support pulling messages. I would much prefer having the messages pushed to my service.
SubscribableChannel.subscribe() also looks promising, but how do I get hold of the correct channel?
I would really like to be able to call something like
messagingTemplate.subscribe("/topic/data/*",
new MessageHandler<String>{
public void handleMessage(String s){
// process message
}
});

Answer 1

The following works for me, but it would be nice with a more direct way to do it:
public interface MessageHandler<T> {
public void handleMessage(T message);
}
#Autowired
private AbstractSubscribableChannel brokerChannel;
private PathMatcher pathMatcher = new AntPathMatcher();
private <T> void subscribe(final String topic, final Handler<T> handler, final Class<T> messageClass){
brokerChannel.subscribe(new MessageHandler() {
#Override
public void handleMessage(Message<?> message) throws MessagingException {
SimpMessageHeaderAccessor headers = SimpMessageHeaderAccessor.wrap(message);
final String destination = headers.getDestination();
if(pathMatcher.match(topic, destination)) {
final T messageObject = (T) messageConverter.fromMessage(message, messageClass);
handler.handleMessage(messageObject);
}
}
});
}