org.apache.flink.runtime.event.task

Class EventNotificationManager

java.lang.Object

org.apache.flink.runtime.event.task.EventNotificationManager

public class EventNotificationManager
extends Object

The event notification manager manages the subscription of EventListener objects to particular event types. Moreover, it handles the dispatching of the events. This class is thread-safe.

Constructor Summary

Constructors

Constructor and Description
EventNotificationManager()

Method Summary

Methods

Modifier and Type	Method and Description
void	deliverEvent(AbstractTaskEvent event) Delivers a event to all of the registered subscribers.
void	subscribeToEvent(EventListener eventListener, Class<? extends AbstractTaskEvent> eventType) Subscribes the given event listener object to the specified event type.
void	unsubscribeFromEvent(EventListener eventListener, Class<? extends AbstractEvent> eventType) Removes a subscription of an EventListener object for the given event type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EventNotificationManager

public EventNotificationManager()

Method Detail

subscribeToEvent

public void subscribeToEvent(EventListener eventListener,
                    Class<? extends AbstractTaskEvent> eventType)

Subscribes the given event listener object to the specified event type.

Parameters:

eventListener - the EventListener object to create the subscription for

eventType - the event type the given listener object wants to be notified about

unsubscribeFromEvent

public void unsubscribeFromEvent(EventListener eventListener,
                        Class<? extends AbstractEvent> eventType)

Removes a subscription of an EventListener object for the given event type.

Parameters:

eventListener - the event listener to remove the subscription for

eventType - the event type to remove the subscription for

deliverEvent

public void deliverEvent(AbstractTaskEvent event)

Delivers a event to all of the registered subscribers.

Parameters:

event - The event to deliver.