Package org.apache.ode.bpel.scheduler.quartz

Source Code of org.apache.ode.bpel.scheduler.quartz.JTAJobRunShell

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

package org.apache.ode.bpel.scheduler.quartz;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.core.JobRunShell;
import org.quartz.core.JobRunShellFactory;
import org.quartz.core.SchedulingContext;

import javax.transaction.Status;
import javax.transaction.SystemException;
import javax.transaction.TransactionManager;

/**
* A riff on the Quartz JTA implementation that dispenses with the use
* of the UserTransaction interface, and instead goes direct to the source,
* the TransactionManager.
*
*/
public class JTAJobRunShell extends JobRunShell {

    protected final Log __log = LogFactory.getLog(getClass());

  /*
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   * Data members.
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   */

  private final TransactionManager _txm;

  /**
   * <p>
   * Create a JTAJobRunShell instance with the given settings.
   * </p>
   */
  public JTAJobRunShell(JobRunShellFactory jobRunShellFactory,
          Scheduler scheduler, SchedulingContext schdCtxt,
          TransactionManager tm) {
      super(jobRunShellFactory, scheduler, schdCtxt);
      if (tm == null)
          throw new NullPointerException("Null transaction manager.");
      _txm = tm;
     
  }

  /*
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   * Interface.
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   */

  protected void begin() throws SchedulerException {
      try {
          if (__log.isDebugEnabled()) __log.debug("Starting transaction.");
          _txm.begin();
      } catch (Exception nse) {

          throw new SchedulerException(
                  "JTAJobRunShell could not start UserTransaction.", nse);
      }
  }

  protected void complete(boolean successfulExecution)
          throws SchedulerException {

      if (_txm == null) return;

      try {
          if (_txm.getStatus() == Status.STATUS_MARKED_ROLLBACK) {
              log.debug("UserTransaction marked for rollback only.");
              successfulExecution = false;
          }
      } catch (SystemException e) {
          throw new SchedulerException(
                  "JTAJobRunShell could not read UserTransaction status.", e);
      }

      if (successfulExecution) {
          try {
              if (__log.isDebugEnabled()) __log.debug("Commiting transaction.");
              _txm.commit();
          } catch (Exception nse) {
              throw new SchedulerException(
                      "JTAJobRunShell could not commit UserTransaction.", nse);
          }
      } else {
          try {
              if (__log.isDebugEnabled()) __log.debug("Rollbacking transaction.");         
              _txm.rollback();
          } catch (Exception nse) {
              throw new SchedulerException(
                      "JTAJobRunShell could not rollback UserTransaction.",
                      nse);
          }
      }


  }


}
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