/*
* 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.io.PrintWriter;
import java.io.StringWriter;
import javax.transaction.Synchronization;
import org.jbpm.api.JbpmException;
import org.jbpm.api.cmd.Command;
import org.jbpm.api.cmd.Environment;
import org.jbpm.internal.log.Log;
import org.jbpm.pvm.internal.cmd.CommandService;
import org.jbpm.pvm.internal.job.JobImpl;
import org.jbpm.pvm.internal.session.DbSession;
import org.jbpm.pvm.internal.tx.Transaction;
/**
* @author Tom Baeyens
*/
public class JobExceptionHandler implements Synchronization, Command<Object> {
private static final Log log = Log.getLog(JobExceptionHandler.class.getName());
private static final long serialVersionUID = 1L;
protected CommandService commandService;
protected long jobDbid;
protected Throwable exception;
public JobExceptionHandler(long jobDbid, Throwable exception, CommandService commandService) {
this.commandService = commandService;
this.jobDbid = jobDbid;
this.exception = exception;
}
public void beforeCompletion() {
}
public void afterCompletion(int status) {
// after the transaction rolled back,
// execute this job exception handler object as a command with
// the command service so that this gets done in a separate
// transaction
log.debug("starting new transaction for handling job exception");
commandService.execute(this);
log.debug("completed transaction for handling job exception");
}
public Object execute(Environment environment) throws Exception {
log.debug("handling job "+jobDbid+" exception: "+exception.getMessage());
// load the job from the db
DbSession dbSession = environment.get(DbSession.class);
if (dbSession==null) {
throw new JbpmException("no job-session configured to handle job");
}
JobImpl<?> job = (JobImpl<?>) dbSession.get(JobImpl.class, jobDbid);
// serialize the stack trace
StringWriter sw = new StringWriter();
exception.printStackTrace(new PrintWriter(sw));
if (job != null) {
// decrement the number of retries
int decrementedRetries = job.getRetries()-1;
log.debug("decrementing retries to "+decrementedRetries+" for "+job);
job.release();
job.setRetries(decrementedRetries);
job.setException(sw.toString());
// notify the job executor after the transaction is completed
Transaction transaction = environment.get(Transaction.class);
JobExecutor jobExecutor = environment.get(JobExecutor.class);
if ( (transaction!=null)
&& (jobExecutor!=null)
) {
log.trace("registering job executor notifier with "+transaction);
transaction.registerSynchronization(new JobAddedNotification(jobExecutor));
}
}
return null;
}
}