com.arjuna.mwlabs.wsas.activity.ReaperThread Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a full listing
* of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2005-2006,
* @author JBoss Inc.
*/
/*
* Copyright (C) 2002,
*
* Arjuna Technologies Limited,
* Newcastle upon Tyne,
* Tyne and Wear,
* UK.
*
* $Id: ReaperThread.java,v 1.1 2002/11/25 10:51:46 nmcl Exp $
*/
package com.arjuna.mwlabs.wsas.activity;
/**
* Class to record transactions with non-zero timeout values, and
* class to implement a transaction reaper thread which terminates
* these transactions once their timeout elapses.
*
* @author Mark Little ([email protected])
* @version $Id: ReaperThread.java,v 1.1 2002/11/25 10:51:46 nmcl Exp $
* @since 1.0.
*/
public class ReaperThread extends Thread
{
public ReaperThread (ActivityReaper arg)
{
super("XTS Activity Reaper");
_reaperObject = arg;
_sleepPeriod = 0;
_shutdown = false;
this.setDaemon(true);
}
public void run ()
{
for (;;)
{
synchronized(this) {
// see if we need to stop checking
if (_shutdown) {
return;
}
_sleepPeriod = _reaperObject.sleepPeriod();
if (_sleepPeriod > 0) {
try {
wait(_sleepPeriod);
} catch (InterruptedException e) {
// do nothing
}
} else if (_sleepPeriod == 0) {
try {
wait();
} catch (InterruptedException e) {
// do nothing
}
}
// we might have let go of the lock so see once again if we need to stop checking
if (_shutdown) {
return;
}
}
// see if we have any work to do
_reaperObject.check(System.currentTimeMillis());
}
}
public synchronized void shutdown ()
{
_shutdown = true;
notify();
}
private ActivityReaper _reaperObject;
private long _sleepPeriod;
private boolean _shutdown;
}