@Override
@SuppressWarnings("unchecked")
public synchronized Listener onEvent(String event, Consumer listener) {
Listeners listeners = eventListeners.get(event);
if (listeners == null) {
listeners = new Listeners();
eventListeners.put(event, listeners);
parent.onEvent(event, message -> handleEvent(event, (InstanceEvent) message));
}
return listeners.add(listener);
}
@Override
public Listener<Session> onClose(Consumer<Session> listener) {
return closeListeners.add(Assert.notNull(listener, "listener"));
}
@Override
public Listener<Session> onOpen(Consumer<Session> listener) {
return openListeners.add(Assert.notNull(listener, "listener"));
}