@Override public void addEvent(String listenerName, Event event) { Map<String, RegisteredListener> listeners = getListenersByEvent().get(event.getClass()); if (listeners == null) { listeners = new ConcurrentHashMap<String, RegisteredListener>(); this.listenersByEvent.put(event.getClass(), listeners); } RegisteredListener listener = listeners.get(listenerName); if (listener != null) { listener.addEvent(event); } else { listeners.put(listenerName, new RegisteredListener(this.getListener(listenerName), event)); } }
@Override public void addListener(EventListener eventListener) { // Register the listener by name. If already registered, override it. EventListener previousListener = getListenersByName().put(eventListener.getName(), eventListener); // If the passed event listener name is already registered, log a warning if (previousListener != null) { this.logger.warn( "The [{}] listener has overwritten a previously " + "registered listener [{}] since they both are registered under the same id [{}]. " + "In the future consider removing a Listener first if you really want to register it again.", new Object[] { eventListener.getClass().getName(), previousListener.getClass().getName(), eventListener.getName() }); } // For each event defined for this listener, add it to the Event Map. for (Event event : eventListener.getEvents()) { // Check if this is a new Event type not already registered Map<String, RegisteredListener> eventListeners = this.listenersByEvent.get(event.getClass()); if (eventListeners == null) { // No listener registered for this event yet. Create a map to store listeners for this // event. eventListeners = new ConcurrentHashMap<String, RegisteredListener>(); this.listenersByEvent.put(event.getClass(), eventListeners); // There is no RegisteredListener yet, create one eventListeners.put(eventListener.getName(), new RegisteredListener(eventListener, event)); } else { // Add an event to existing RegisteredListener object RegisteredListener registeredListener = eventListeners.get(eventListener.getName()); if (registeredListener == null) { eventListeners.put(eventListener.getName(), new RegisteredListener(eventListener, event)); } else { registeredListener.addEvent(event); } } } }