How to use

DefaultEventBus

in

org.apache.shiro.event.support

protected EventBus eventBus() {
  return new DefaultEventBus();
}

public void register(Object instance) {
  if (instance == null) {
    log.info("Received null instance for event listener registration.  Ignoring registration request.");
    return;
  }
  unregister(instance);
  List<EventListener> listeners = getEventListenerResolver().getEventListeners(instance);
  if (listeners == null || listeners.isEmpty()) {
    log.warn("Unable to resolve event listeners for subscriber instance [{}]. Ignoring registration request.",
        instance);
    return;
  }
  Subscription subscription = new Subscription(listeners);
  this.registryWriteLock.lock();
  try {
    this.registry.put(instance, subscription);
  } finally {
    this.registryWriteLock.unlock();
  }
}

private Map<String,Object> createDefaultObjectMap() {
  Map<String,Object> map = new LinkedHashMap<String, Object>();
  map.put(EVENT_BUS_NAME, new DefaultEventBus());
  return map;
}

/**
 * Default no-arg constructor that will automatically attempt to initialize a default cacheManager
 */
public CachingSecurityManager() {
  //use a default event bus:
  setEventBus(new DefaultEventBus());
}

/**
 * Destroys the {@link #getCacheManager() cacheManager} via {@link LifecycleUtils#destroy LifecycleUtils.destroy}.
 */
public void destroy() {
  LifecycleUtils.destroy(getCacheManager());
  this.cacheManager = null;
  LifecycleUtils.destroy(getEventBus());
  this.eventBus = new DefaultEventBus();
}

/**
 * Default no-arg constructor that will automatically attempt to initialize a default cacheManager
 */
public CachingSecurityManager() {
  //use a default event bus:
  setEventBus(new DefaultEventBus());
}

/**
 * Destroys the {@link #getCacheManager() cacheManager} via {@link LifecycleUtils#destroy LifecycleUtils.destroy}.
 */
public void destroy() {
  LifecycleUtils.destroy(getCacheManager());
  this.cacheManager = null;
  LifecycleUtils.destroy(getEventBus());
  this.eventBus = new DefaultEventBus();
}

protected EventBus eventBus() {
  return new DefaultEventBus();
}

private Map<String,Object> createDefaultObjectMap() {
  Map<String,Object> map = new LinkedHashMap<String, Object>();
  map.put(EVENT_BUS_NAME, new DefaultEventBus());
  return map;
}