org.apache.jcs.engine.control.event
Class ElementEventQueue

java.lang.Object
  org.apache.jcs.engine.control.event.ElementEventQueue

All Implemented Interfaces:

IElementEventQueue

public class ElementEventQueue

extends java.lang.Object

implements IElementEventQueue

An event queue is used to propagate ordered cache events to one and only one target listener.

Nested Class Summary

private class	ElementEventQueue.AbstractElementEventRunner Retries before declaring failure.
private class	ElementEventQueue.ElementEventRunner
private static class	ElementEventQueue.Node
private class	ElementEventQueue.QProcessor

Field Summary

private java.lang.String	cacheName
private boolean	destroyed
private ElementEventQueue.Node	head
private static org.apache.commons.logging.Log	log
private static int	processorInstanceCount
private java.lang.Object	queueLock
private java.lang.Thread	t
private ElementEventQueue.Node	tail

Constructor Summary

ElementEventQueue(java.lang.String cacheName)
Constructor for the ElementEventQueue object

Method Summary

void	addElementEvent(IElementEventHandler hand, IElementEvent event) Adds an ElementEvent to be handled
void	destroy() Event Q is emtpy.
boolean	isAlive() Gets the alive attribute of the IElementEventQueue object
private void	put(ElementEventQueue.AbstractElementEventRunner event) Adds an event to the queue.
private ElementEventQueue.AbstractElementEventRunner	take()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

log

private static final org.apache.commons.logging.Log log

processorInstanceCount

private static int processorInstanceCount

cacheName

private java.lang.String cacheName

destroyed

private boolean destroyed

t

private java.lang.Thread t

queueLock

private java.lang.Object queueLock

head

private ElementEventQueue.Node head

tail

private ElementEventQueue.Node tail

Constructor Detail

ElementEventQueue

public ElementEventQueue(java.lang.String cacheName)

Constructor for the ElementEventQueue object

Parameters:

cacheName -

Method Detail

destroy

public void destroy()

Event Q is emtpy.

Specified by:

destroy in interface IElementEventQueue

toString

public java.lang.String toString()

Returns:

the region name for the event queue

isAlive

public boolean isAlive()

Description copied from interface: IElementEventQueue

Gets the alive attribute of the IElementEventQueue object

Specified by:

isAlive in interface IElementEventQueue

Returns:

The destroyed value

addElementEvent

public void addElementEvent(IElementEventHandler hand,
                            IElementEvent event)
                     throws java.io.IOException

Adds an ElementEvent to be handled

Specified by:

addElementEvent in interface IElementEventQueue

Parameters:

hand - The IElementEventHandler

event - The IElementEventHandler IElementEvent event

Throws:

java.io.IOException

put

private void put(ElementEventQueue.AbstractElementEventRunner event)

Adds an event to the queue.

Parameters:

event -

take

private ElementEventQueue.AbstractElementEventRunner take()
                                                   throws java.lang.InterruptedException

Throws:

java.lang.InterruptedException