org.apache.openjpa.lib.util.concurrent
Class WaitQueue

java.lang.Object
  org.apache.openjpa.lib.util.concurrent.WaitQueue

public abstract class WaitQueue
extends Object

Base class for internal queue classes for semaphores, etc. Relies on subclasses to actually implement queue mechanics. NOTE: this class is NOT present in java.util.concurrent.

Nested Class Summary

static interface	WaitQueue.QueuedSync
static class	WaitQueue.WaitNode

Constructor Summary

WaitQueue()

Method Summary

abstract WaitQueue.WaitNode	extract()
abstract int	getLength()
abstract Collection	getWaitingThreads()
abstract boolean	hasNodes()
abstract void	insert(WaitQueue.WaitNode w)
abstract boolean	isWaiting(Thread thread)

Methods inherited from class java.lang.Object

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

Constructor Detail

WaitQueue

public WaitQueue()

Method Detail

insert

public abstract void insert(WaitQueue.WaitNode w)

extract

public abstract WaitQueue.WaitNode extract()

hasNodes

public abstract boolean hasNodes()

getLength

public abstract int getLength()

getWaitingThreads

public abstract Collection getWaitingThreads()

isWaiting

public abstract boolean isWaiting(Thread thread)