TransactionInterceptor


1   /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10  * the License, or (at your option) any later version.
11  *
12  * This software is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this software; if not, write to the Free
19  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21  */
22  package org.jboss.proxy;
23  
24  import javax.transaction.TransactionManager  ;
25  import javax.transaction.Transaction  ;
26  
27  import org.jboss.invocation.Invocation;
28  import org.jboss.proxy.Interceptor;
29  
30  /**
31  * The client-side proxy for an EJB Home object.
32  *      
33  * @author <a HREF="mailto:marc.fleury@jboss.org">Marc Fleury</a>
34  * @version $Revision: 37459 $
35  */
36  public class TransactionInterceptor
37     extends Interceptor
38  {
39     /** Serial Version Identifier. @since 1.4.2.1 */
40     private static final long serialVersionUID = 371972342995600888L;
41  
42     public static TransactionManager   tm;
43  
44     /**
45     * No-argument constructor for externalization.
46     */
47     public TransactionInterceptor()
48     {
49     }
50  
51     // Public --------------------------------------------------------
52     
53     public Object   invoke(Invocation invocation) 
54     throws Throwable  
55     {
56        if (tm != null)
57        {
58           Transaction   tx = tm.getTransaction();
59           if (tx != null) invocation.setTransaction(tx);
60        }
61        return getNext().invoke(invocation);
62     }
63     
64     
65     /** Transaction manager. */
66     public static void setTransactionManager(TransactionManager   tmx)
67     {
68        tm = tmx;
69     }
70  }
71
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