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1   /*
2    * $Id: JotmTransactionManagerFactory.java 7976 2007-08-21 14:26:13Z 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   * @author Guillaume Nodet
27   * @version $Revision: 7976 $
28   */
29  public class JotmTransactionManagerFactory implements UMOTransactionManagerFactory
30  {
31      private TransactionManager jotmCurrent;
32  
33      public JotmTransactionManagerFactory()
34      {
35          super();
36      }
37  
38      /**
39       * Retrieves the JOTM Current object that implements the TransactionManager
40       * interface.
41       * 
42       * @see org.mule.umo.manager.UMOTransactionManagerFactory#create()
43       */
44      public synchronized TransactionManager create() throws Exception
45      {
46          if (jotmCurrent == null)
47          {
48              // check for already active JOTM instance
49              jotmCurrent = Current.getCurrent();
50              // if none found, create new local JOTM instance
51              if (jotmCurrent == null)
52              {
53                  jotmCurrent = new Jotm(true, false).getTransactionManager();
54              }
55          }
56          return jotmCurrent;
57      }
58  
59  }