/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt 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.jbpm.pvm.internal.jobexecutor;
import java.util.Collection;
import java.util.concurrent.BlockingQueue;
import org.jbpm.internal.log.Log;
import org.jbpm.pvm.internal.cmd.CommandService;
import org.jbpm.pvm.internal.cmd.ExecuteJobCmd;
/**
* @author Tom Baeyens, Guillaume Porcher
*/
public class JobExecutorThread extends Thread {
private static final Log log = Log.getLog(JobExecutorThread.class.getName());
JobExecutor jobExecutor;
boolean isActive = true;
public JobExecutorThread(String name, JobExecutor jobExecutor) {
super(name);
this.jobExecutor = jobExecutor;
}
public void run() {
log.info("starting...");
try {
BlockingQueue<Collection<Long>> queue = jobExecutor.getJobDbidsQueue();
if (queue == null) {
log.debug("no queue to take jobs from");
} else {
while (isActive) {
try {
log.trace("taking jobs from queue");
Collection<Long> jobDbids = null;
jobDbids = queue.take();
log.debug("took job(s) "+jobDbids+" from queue");
for (Long jobDbid: jobDbids) {
CommandService commandService = jobExecutor.getCommandExecutor();
commandService.execute(new ExecuteJobCmd(jobDbid));
}
} catch (InterruptedException e) {
log.trace("waiting for acquired jobs got interrupted");
} catch (Exception e) {
log.error("exception in job executor thread", e);
}
}
}
} catch (Throwable t) {
t.printStackTrace();
} finally {
log.info(getName()+" leaves cyberspace");
}
}
public void deactivate() {
deactivate(false);
}
public void deactivate(boolean join) {
if (isActive) {
log.trace("deactivating "+getName());
isActive = false;
interrupt();
if (join) {
while (isAlive()) {
try {
join();
} catch (InterruptedException e) {
log.trace("joining "+getName()+" got interrupted");
}
}
}
} else {
log.trace("ignoring deactivate: "+getName()+" is not active");
}
}
}