Package org.eclipse.net4j.util.event
Interface INotifier
- All Known Subinterfaces:
ICacheMonitor,IContainer<E>,IContainer.Modifiable<E>,IContainer.Persistable<E>,IContainerBlockingQueue<E>,IContainerCollection<E>,IContainerList<E>,IContainerMap<K,,V> IContainerQueue<E>,IContainerSet<E>,IContainerSortedSet<E>,IHistory<T>,ILifecycle,IManagedContainer,INotifier.INotifier2,IOptions,IPluginContainer,IRegistry<K,,V> OMPreferences
- All Known Implementing Classes:
AbstractDelegator,Cache,CacheMonitor,ChallengeNegotiator,ChallengeResponseNegotiator,Container,ContainerBlockingQueue,ContainerCollection,ContainerElementList,ContainerList,ContainerMap,ContainerQueue,ContainerSet,ContainerSortedSet,DelegableReentrantLock,DelegatingRegistry,ElementWizard,ExecutorServiceNotifier,ExecutorServiceNotifier.ThreadPool,ExecutorWorkSerializer,FileUserManager,FiniteStateMachine,HashMapDelegatingRegistry,HashMapRegistry,HashMapRegistry.AutoCommit,History,Lifecycle,LifecycleHook,ListContainer,ManagedContainer,ModifiableContainer,Negotiator,Notifier,NotifyingMonitor,PersistableContainer,PreferenceHistory,PriorityQueueRunner,QueueRunner,QueueRunner2,QueueWorker,QueueWorkerWorkSerializer,Randomizer,ReferenceMonitor,ReferenceQueueWorker,Registry,ResponseNegotiator,RollingLog,RWLockManager,RWOLockManager,SashComposite,SerializingExecutor,SetContainer,ShareableLifecycle,TimerLifecycle,UIQueueRunner,UnmodifiableRegistry,UserManager,UserManagerAuthenticator,ValueNotifier,Worker
public interface INotifier
An entity that a number of
listeners can be registered with and that can fire events
to these registered listeners.
Implementors are encouraged to document the event types that they are able to fire and that their listeners may want to receive and handle.
Implementors may want to extend Notifier instead of implementing this interface directly.
- Author:
- Eike Stepper
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Nested Class Summary
Nested Classes -
Method Summary
Modifier and TypeMethodDescriptionvoidaddListener(IListener listener) Adds a listener to this notifier.Returns the listeners that are registered with this notifier.booleanReturnstrueif one or more listeners are registered with this notifier,falseotherwise.voidremoveListener(IListener listener) Removes a listener from this notifier.
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Method Details
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addListener
Adds a listener to this notifier.Depending on the implementation duplicate listeners may lead to duplicate event delivery or not. Implementors are encouraged to prevent events from being delivered more than once to the same listener,
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removeListener
Removes a listener from this notifier. -
hasListeners
boolean hasListeners()Returnstrueif one or more listeners are registered with this notifier,falseotherwise.- Since:
- 3.0
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getListeners
IListener[] getListeners()Returns the listeners that are registered with this notifier.Depending on the implementation duplicate listeners may be contained in the returned array.
- Since:
- 3.0
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