View Javadoc

1   /*
2    * $Id: JotmTransactionManagerFactory.java 7963 2007-08-21 08:53:15Z dirk.olmes $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.extras.jotm;
12  
13  import org.mule.umo.manager.UMOTransactionManagerFactory;
14  
15  import javax.transaction.TransactionManager;
16  
17  import org.objectweb.jotm.Current;
18  import org.objectweb.jotm.Jotm;
19  
20  /**
21   * This factory retrieves the transaction manager for <a
22   * href="http://jotm.objectweb.org">JOTM </a>. If an existing JOTM instance exists
23   * (for example if running on JOnAS) it will retrieve it, else if will create a new
24   * local JOTM instance.
25   */
26  public class JotmTransactionManagerFactory implements UMOTransactionManagerFactory
27  {
28      private TransactionManager jotmCurrent;
29  
30      public JotmTransactionManagerFactory()
31      {
32          super();
33      }
34  
35      /**
36       * Retrieves the JOTM Current object that implements the TransactionManager
37       * interface.
38       * 
39       * @see org.mule.umo.manager.UMOTransactionManagerFactory#create()
40       */
41      public synchronized TransactionManager create() throws Exception
42      {
43          if (jotmCurrent == null)
44          {
45              // check for already active JOTM instance
46              jotmCurrent = Current.getCurrent();
47              // if none found, create new local JOTM instance
48              if (jotmCurrent == null)
49              {
50                  jotmCurrent = new Jotm(true, false).getTransactionManager();
51              }
52          }
53          return jotmCurrent;
54      }
55  
56  }