java - Spring websocket STOMP Unsubscribe from eventHandler -

i have spring websocket stomp application accepts subscribe requests.

in application have handler subscribe, is,

 @component  public class subscribestompeventhandler implements applicationlistener<sessionsubscribeevent> {      @override     public void onapplicationevent(sessionsubscribeevent event) {}  } 

that use validate subscription.

in case if subscription invalid, instance, current user can not see subscription, broker (i use simplemessagingbroker) "forget" subscription, or preferably, not register @ all.

my questions are:

• can make broker not register subscription, if move handling of subscription request incoming message interceptor , stop message propagation?

• what else used event handler cancel subscription?

you need create channelinterceptor implementation. extend channelinterceptoradapter , override presend(message<?> message, messagechannel channel). here access headers session information validation. need registrate interceptor

@override public void configuremessagebroker(messagebrokerregistry registry) {     registry.configurebrokerchannel().setinterceptors(new yourinterceptor())     registry.enablesimplebroker("/queue/", "/topic/");     registry.setapplicationdestinationprefixes("/app"); } 

more information here how reject topic subscription based on user rights spring-websocket