org.jgroups.util

Class CondVar

java.lang.Object

org.jgroups.util.CondVar

public class CondVar
extends java.lang.Object

A condition variable with methods for (timed) waiting and signalling

Since:

3.6

Author:

Bela Ban

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.locks.Condition	cond
protected java.util.concurrent.locks.Lock	lock

Constructor Summary

Constructors

Constructor and Description
CondVar()
CondVar(java.util.concurrent.locks.Lock lock)

Method Summary

Modifier and Type	Method and Description
void	signal(boolean signal_all) Wakes up one (signal_all=false) or all (signal_all=true) blocked threads.
void	waitFor(Condition condition) Blocks until condition is true.
boolean	waitFor(Condition condition, long timeout, java.util.concurrent.TimeUnit unit) Blocks until condition is true or the time elapsed

Methods inherited from class java.lang.Object

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

Field Detail

lock

protected final java.util.concurrent.locks.Lock lock

cond

protected final java.util.concurrent.locks.Condition cond

Constructor Detail

CondVar

public CondVar()

CondVar

public CondVar(java.util.concurrent.locks.Lock lock)

Method Detail

waitFor

public void waitFor(Condition condition)

Blocks until condition is true.

Parameters:

condition - The condition. Must be non-null

waitFor

public boolean waitFor(Condition condition,
                       long timeout,
                       java.util.concurrent.TimeUnit unit)

Blocks until condition is true or the time elapsed

Parameters:

condition - The condition

timeout - The timeout to wait. A value <= 0 causes immediate return

unit - TimeUnit

Returns:

The condition's status

signal

public void signal(boolean signal_all)

Wakes up one (signal_all=false) or all (signal_all=true) blocked threads. Usually called when the condition changed to true.

Parameters:

signal_all -