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org.objectstyle.cayenne.util
Class RequestQueue  

java.lang.Object
  org.objectstyle.cayenne.util.RequestQueue

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public class RequestQueue

extends java.lang.Object

RequestQueue implements a FIFO queue for threads waiting for a particular event, resource, etc. Each thread will wait in the queue until either of the following events happen:

• Thread is already #1 in the queue and an awaited event occurrs.
• Thread timeout interval expired.
• Thread was interrupted (this is a quick way to remove thread from the queue).

If any of the conditions above ocurrs, thread will be removed from the queue.

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Field Summary
private static org.apache.log4j.Logger	logObj
protected  int	maxSize
protected  java.util.List	queue
protected  int	timeout

 

Constructor Summary

RequestQueue(int maxSize, int timeout)           Constructor for RequestQueue.

 

Method Summary
boolean	dequeueFirst(java.lang.Object dequeuedObj)           Releases the first thread in the queue.
int	getSize()
RequestDequeue	queueThread()           Queues current thread.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

logObj

private static org.apache.log4j.Logger logObj

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queue

protected java.util.List queue

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maxSize

protected int maxSize

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timeout

protected int timeout

Constructor Detail

RequestQueue

public RequestQueue(int maxSize,
                    int timeout)

Constructor for RequestQueue.

Method Detail

getSize

public int getSize()

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queueThread

public RequestDequeue queueThread()

Queues current thread. This will block the caller till the thread is dequeued as a result of another thread calling dequeueFirst or as a result of a timeout.

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dequeueFirst

public boolean dequeueFirst(java.lang.Object dequeuedObj)

Releases the first thread in the queue.

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