/*
* 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 file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY 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 along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.resource.adapter.mail.inflow;
import java.util.concurrent.PriorityBlockingQueue;
import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkManager;
import javax.resource.spi.work.WorkException;
import javax.resource.spi.work.WorkEvent;
import javax.resource.spi.work.WorkListener;
import org.jboss.logging.Logger;
/**
* @author Scott.Stark@jboss.org
* @version $Revision: 76091 $
*/
public class NewMsgsWorker
implements Work, WorkListener
{
private static Logger log = Logger.getLogger(NewMsgsWorker.class);
private boolean released;
private WorkManager mgr;
private PriorityBlockingQueue pollQueue;
private boolean trace;
public NewMsgsWorker(WorkManager mgr)
{
this.mgr = mgr;
// The capacity needs to be externalized
this.pollQueue = new PriorityBlockingQueue(1024);
this.trace = log.isTraceEnabled();
}
public void watch(MailActivation activation) throws InterruptedException
{
long now = System.currentTimeMillis();
activation.updateNextNewMsgCheckTime(now);
pollQueue.put(activation);
}
public void release()
{
released = true;
if( trace )
log.trace("released");
}
public void run()
{
if( trace )
log.trace("Begin run");
while( released == false )
{
try
{
MailActivation ma = (MailActivation) pollQueue.take();
// Wait until its time to check for new msgs
long now = System.currentTimeMillis();
long nextTime = ma.getNextNewMsgCheckTime();
long sleepMS = nextTime - now;
Thread.sleep(sleepMS);
if( released )
break;
// This has to go after the sleep otherwise we can get into an inconsistent state
if( ma.isReleased() )
continue;
// Now schedule excecution of the new msg check
mgr.scheduleWork(ma, WorkManager.INDEFINITE, null, this);
}
catch(InterruptedException e)
{
log.warn("Interrupted waiting for new msg check", e);
}
catch (WorkException e)
{
log.warn("Failed to schedule new msg check", e);
}
}
if( trace )
log.trace("End run");
}
// --- Begin WorkListener interface methods
public void workAccepted(WorkEvent e)
{
if( trace )
log.trace("workAccepted, e="+e);
}
public void workRejected(WorkEvent e)
{
if( trace )
log.trace("workRejected, e="+e);
}
public void workStarted(WorkEvent e)
{
if( trace )
log.trace("workStarted, e="+e);
}
public void workCompleted(WorkEvent e)
{
if( trace )
log.trace("workCompleted, e="+e);
MailActivation activation = (MailActivation) e.getWork();
try
{
watch(activation);
}
catch(InterruptedException ex)
{
log.warn("Failed to reschedule new msg check", ex);
}
}
// --- End WorkListener interface methods
}