/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, 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.work;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.TimeUnit;
import javax.resource.spi.work.ExecutionContext;
import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkCompletedException;
import javax.resource.spi.work.WorkEvent;
import javax.resource.spi.work.WorkException;
import javax.resource.spi.work.WorkListener;
import javax.resource.spi.work.WorkManager;
import javax.resource.spi.work.WorkRejectedException;
import javax.transaction.xa.Xid;
import org.jboss.logging.Logger;
import org.jboss.threads.BlockingExecutor;
import org.jboss.threads.ExecutionTimedOutException;
import org.jboss.tm.JBossXATerminator;
import org.jboss.system.ServiceMBeanSupport;
/**
* The work manager implementation
*
* @author <a href="mailto:adrian@jboss.org">Adrian Brock</a>
* @version $Revision: 100756 $
*/
public class JBossWorkManager extends ServiceMBeanSupport implements WorkManager, JBossWorkManagerMBean
{
/** The logger */
private static Logger log = Logger.getLogger(JBossWorkManager.class);
/** Whether trace is enabled */
private static boolean trace = log.isTraceEnabled();
/** The executor */
private BlockingExecutor executor;
/** The XA terminator */
private JBossXATerminator xaTerminator;
/**
* Constructor
*/
public JBossWorkManager()
{
}
/**
* Retrieve the executor
* @return The executor
*/
public BlockingExecutor getExecutor()
{
return executor;
}
/**
* Set the executor
* @param executor The executor
*/
public void setExecutor(BlockingExecutor executor)
{
this.executor = executor;
}
/**
* Get the XATerminator
* @return The XA terminator
*/
public JBossXATerminator getXATerminator()
{
return xaTerminator;
}
/**
* Set the XATerminator
* @param xaTerminator The XA terminator
*/
public void setXATerminator(JBossXATerminator xaTerminator)
{
this.xaTerminator = xaTerminator;
}
/**
* Get the work manager instance
* @return The instance
*/
public WorkManager getInstance()
{
return this;
}
/**
* {@inheritDoc}
*/
public void doWork(Work work) throws WorkException
{
doWork(work, WorkManager.INDEFINITE, null, null);
}
/**
* {@inheritDoc}
*/
public void doWork(Work work,
long startTimeout,
ExecutionContext execContext,
WorkListener workListener)
throws WorkException
{
WorkException exception = null;
WorkWrapper wrapper = null;
try
{
if (work == null)
throw new WorkRejectedException("Work is null");
if (startTimeout < 0)
throw new WorkRejectedException("StartTimeout is negative: " + startTimeout);
if (execContext == null)
{
execContext = new ExecutionContext();
}
final CountDownLatch completedLatch = new CountDownLatch(1);
wrapper = new WorkWrapper(this, work, execContext, workListener, null, completedLatch);
if (workListener != null)
{
WorkEvent event = new WorkEvent(this, WorkEvent.WORK_ACCEPTED, work, null);
workListener.workAccepted(event);
}
BlockingExecutor executor = getExecutor(work);
if (startTimeout == WorkManager.INDEFINITE)
{
executor.executeBlocking(wrapper);
}
else
{
executor.executeBlocking(wrapper, startTimeout, TimeUnit.MILLISECONDS);
}
completedLatch.await();
}
catch (ExecutionTimedOutException etoe)
{
exception = new WorkRejectedException(etoe);
exception.setErrorCode(WorkRejectedException.START_TIMED_OUT);
}
catch (RejectedExecutionException ree)
{
exception = new WorkRejectedException(ree);
}
catch (WorkException we)
{
exception = we;
}
catch (InterruptedException ie)
{
Thread.currentThread().interrupt();
exception = new WorkRejectedException("Interrupted while requesting permit");
}
finally
{
if (exception != null)
{
if (workListener != null)
{
WorkEvent event = new WorkEvent(this, WorkEvent.WORK_REJECTED, work, exception);
workListener.workRejected(event);
}
throw exception;
}
checkWorkCompletionException(wrapper);
}
}
/**
* {@inheritDoc}
*/
public long startWork(Work work) throws WorkException
{
return startWork(work, WorkManager.INDEFINITE, null, null);
}
/**
* {@inheritDoc}
*/
public long startWork(Work work,
long startTimeout,
ExecutionContext execContext,
WorkListener workListener)
throws WorkException
{
WorkException exception = null;
WorkWrapper wrapper = null;
try
{
if (work == null)
throw new WorkRejectedException("Work is null");
if (startTimeout < 0)
throw new WorkRejectedException("StartTimeout is negative: " + startTimeout);
long started = System.currentTimeMillis();
if (execContext == null)
{
execContext = new ExecutionContext();
}
final CountDownLatch startedLatch = new CountDownLatch(1);
wrapper = new WorkWrapper(this, work, execContext, workListener, startedLatch, null);
if (workListener != null)
{
WorkEvent event = new WorkEvent(this, WorkEvent.WORK_ACCEPTED, work, null);
workListener.workAccepted(event);
}
BlockingExecutor executor = getExecutor(work);
if (startTimeout == WorkManager.INDEFINITE)
{
executor.executeBlocking(wrapper);
}
else
{
executor.executeBlocking(wrapper, startTimeout, TimeUnit.MILLISECONDS);
}
startedLatch.await();
return System.currentTimeMillis() - started;
}
catch (ExecutionTimedOutException etoe)
{
exception = new WorkRejectedException(etoe);
exception.setErrorCode(WorkRejectedException.START_TIMED_OUT);
}
catch (RejectedExecutionException ree)
{
exception = new WorkRejectedException(ree);
}
catch (WorkException we)
{
exception = we;
}
catch (InterruptedException ie)
{
Thread.currentThread().interrupt();
exception = new WorkRejectedException("Interrupted while requesting permit");
}
finally
{
if (exception != null)
{
if (workListener != null)
{
WorkEvent event = new WorkEvent(this, WorkEvent.WORK_REJECTED, work, exception);
workListener.workRejected(event);
}
throw exception;
}
checkWorkCompletionException(wrapper);
}
return WorkManager.UNKNOWN;
}
/**
* {@inheritDoc}
*/
public void scheduleWork(Work work) throws WorkException
{
scheduleWork(work, WorkManager.INDEFINITE, null, null);
}
/**
* {@inheritDoc}
*/
public void scheduleWork(Work work,
long startTimeout,
ExecutionContext execContext,
WorkListener workListener)
throws WorkException
{
WorkException exception = null;
WorkWrapper wrapper = null;
try
{
if (work == null)
throw new WorkRejectedException("Work is null");
if (startTimeout < 0)
throw new WorkRejectedException("StartTimeout is negative: " + startTimeout);
if (execContext == null)
{
execContext = new ExecutionContext();
}
wrapper = new WorkWrapper(this, work, execContext, workListener, null, null);
if (workListener != null)
{
WorkEvent event = new WorkEvent(this, WorkEvent.WORK_ACCEPTED, work, null);
workListener.workAccepted(event);
}
BlockingExecutor executor = getExecutor(work);
if (startTimeout == WorkManager.INDEFINITE)
{
executor.executeBlocking(wrapper);
}
else
{
executor.executeBlocking(wrapper, startTimeout, TimeUnit.MILLISECONDS);
}
}
catch (ExecutionTimedOutException etoe)
{
exception = new WorkRejectedException(etoe);
exception.setErrorCode(WorkRejectedException.START_TIMED_OUT);
}
catch (RejectedExecutionException ree)
{
exception = new WorkRejectedException(ree);
}
catch (WorkException we)
{
exception = we;
}
catch (InterruptedException ie)
{
Thread.currentThread().interrupt();
exception = new WorkRejectedException("Interrupted while requesting permit");
}
finally
{
if (exception != null)
{
if (workListener != null)
{
WorkEvent event = new WorkEvent(this, WorkEvent.WORK_REJECTED, work, exception);
workListener.workRejected(event);
}
throw exception;
}
checkWorkCompletionException(wrapper);
}
}
/**
* Get the executor
* @param work The work instance
* @return The executor
*/
private BlockingExecutor getExecutor(Work work)
{
return executor;
}
/**
* Checks work completed status.
* @param wrapper work wrapper instance
* @throws {@link WorkException} if work is completed with an exception
*/
private void checkWorkCompletionException(WorkWrapper wrapper) throws WorkException
{
if (wrapper.getWorkException() != null)
{
throw wrapper.getWorkException();
}
}
}