Package org.onosproject.event

Class ListenerTracker

java.lang.Object

org.onosproject.event.ListenerTracker

@Beta
@NotThreadSafe
public class ListenerTracker
extends java.lang.Object

Utility to keeps track of registered Listeners.

Usage Example:

    private ListenerTracker listeners;

    @Activate
    protected void activate() {
        listeners = new ListenerTracker();
        listeners.addListener(mastershipService, new InternalMastershipListener())
                 .addListener(deviceService, new InternalDeviceListener())
                 .addListener(linkService, new InternalLinkListener())
                 .addListener(topologyService, new InternalTopologyListener())
                 .addListener(hostService, new InternalHostListener());
    }

    @Deactivate
    protected void deactivate() {
        listeners.removeListeners();
    }
 

Constructor Summary

Constructors

Constructor	Description
ListenerTracker()

Method Summary

Modifier and Type	Method	Description
<E extends Event<?,?>,L extends EventListener<E>> ListenerTracker	addListener(ListenerService<E,L> service, L listener)	Adds EventListener to specified ListenerService.
void	removeListeners()	Removes all listeners in reverse order they have been registered.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListenerTracker

public ListenerTracker()

Method Detail

addListener

public <E extends Event<?,?>,L extends EventListener<E>> ListenerTracker addListener(ListenerService<E,L> service,
                                                                                                 L listener)

Adds EventListener to specified ListenerService.

Type Parameters:

E - event

L - listener

Parameters:

service - ListenerService

listener - EventListener

Returns:

self

removeListeners

public void removeListeners()

Removes all listeners in reverse order they have been registered.