com.hp.util.event

Class AbstractEventSink<E,L>

java.lang.Object

com.hp.util.event.AbstractEventSink<E,L>

Type Parameters:

E - event class

L - listener class

All Implemented Interfaces:

EventSink

public abstract class AbstractEventSink<E,L>
extends Object
implements EventSink

Abstraction of an event sink suitable as a base implementation.

Author:

Thomas Vachuska

Field Summary

Fields

Modifier and Type	Field and Description
protected CopyOnWriteArraySet<L>	listeners Set of our listeners.

Constructor Summary

Constructors

Constructor and Description
AbstractEventSink()

Method Summary

Modifier and Type	Method and Description
void	addListener(L listener) Adds a new listener.
void	clearListeners() Clears all registered listeners.
protected abstract void	dispatch(E event, L listener) Dispatches an event to the specified listener.
void	dispatch(Event event) Dispatches the specified event to all listeners or delegates.
Set<L>	getListeners() Gets all registered listeners.
void	removeListener(L listener) Removes the specified listener.
protected void	reportError(E event, L listener, Throwable error) Reports error encountered while dispatching an event to a listener.

Methods inherited from class java.lang.Object

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

Field Detail

listeners

protected final CopyOnWriteArraySet<L> listeners

Set of our listeners.

Constructor Detail

AbstractEventSink

public AbstractEventSink()

Method Detail

addListener

public void addListener(L listener)

Adds a new listener.

Parameters:

listener - listener to be added

removeListener

public void removeListener(L listener)

Removes the specified listener.

Parameters:

listener - listener to be removed

getListeners

public Set<L> getListeners()

Gets all registered listeners.

Returns:

set of registered listeners

clearListeners

public void clearListeners()

Clears all registered listeners.

dispatch

protected abstract void dispatch(E event,
                                 L listener)

Dispatches an event to the specified listener.

Parameters:

event - event to be dispatched

listener - target listener

dispatch

public void dispatch(Event event)

Description copied from interface: EventSink

Dispatches the specified event to all listeners or delegates.

Specified by:

dispatch in interface EventSink

Parameters:

event - event data

reportError

protected void reportError(E event,
                           L listener,
                           Throwable error)

Reports error encountered while dispatching an event to a listener.

The base implementation is a no-op.

Parameters:

event - event that encountered error

listener - that induced the error

error - error to be reportes