Package org.onehippo.cms7.services.eventbus

Interface HippoEventListener

  • public interface HippoEventListener
    Developers can implement this HippoEventListener interface and implement onEvent(HippoEvent) to get a callback whenever a HippoEvent is posted to the HippoEventBus by HippoEventBus.post(Object)

    Note that this is a convenience interface; it is not necessary to use, as any method that is annotated with the Subscribe annotation having a HippoEvent argument type, will be invoked.

    Example code: 

    
     HippoEventListenerRegistry.get().register(new HippoEventListener() {
         // implement the onEvent method
         // Note that the method with the annotation MUST be public
         public void onEvent(HippoEvent<?> event) {
             System.out.println(event);
     }

     // get the eventBus
     HippoEventBus eventBus = HippoServiceRegistry.getService(HippoEventBus.class);
     // post an event which subsequently will be printed by the listener defined above
     eventBus.post(new HippoEvent("foo").message("bar"));
 });