ListenerEndpoint


1   /*
2    * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3    *
4    * This file is part of Resin(R) Open Source
5    *
6    * Each copy or derived work must preserve the copyright notice and this
7    * notice unmodified.
8    *
9    * Resin Open Source is free software; you can redistribute it and/or modify
10   * it under the terms of the GNU General Public License as published by
11   * the Free Software Foundation; either version 2 of the License, or
12   * (at your option) any later version.
13   *
14   * Resin Open Source is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17   * of NON-INFRINGEMENT.  See the GNU General Public License for more
18   * details.
19   *
20   * You should have received a copy of the GNU General Public License
21   * along with Resin Open Source; if not, write to the
22   *   Free SoftwareFoundation, Inc.
23   *   59 Temple Place, Suite 330
24   *   Boston, MA 02111-1307  USA
25   *
26   * @author Scott Ferguson
27   */
28  
29  package com.caucho.jms.jca;
30  
31  import com.caucho.log.Log;
32  
33  import javax.jms.Message  ;
34  import javax.jms.MessageListener  ;
35  import javax.resource.spi.endpoint.MessageEndpoint  ;
36  import java.util.logging.Level  ;
37  import java.util.logging.Logger  ;
38  
39  /**
40   * The JMS MessageListener endpoint
41   */
42  public class ListenerEndpoint implements MessageEndpoint  , MessageListener   {
43    private static final Logger   log = Log.open(ListenerEndpoint.class);
44  
45    private MessageListener   _listener;
46    
47    /**
48     * Sets the listener.
49     */
50    public void setListener(MessageListener   listener)
51    {
52      _listener = listener;
53    }
54    
55    /**
56     * Called by a resource adapter before a message is delivered.
57     */
58    public void beforeDelivery(java.lang.reflect.Method   method)
59    {
60    }
61  
62    /**
63     * Called by a resource adapter after a message is delivered.
64     */
65    public void afterDelivery()
66    {
67    }
68  
69    /**
70     * Runs the endpoint.
71     */
72    public void onMessage(Message   message)
73    {
74      try {
75        MessageListener   listener = _listener;
76        
77        if (listener != null)
78      listener.onMessage(message);
79      } catch (Throwable   e) {
80        log.log(Level.WARNING, e.toString(), e);
81      }
82    }
83  
84    /**
85     * Called when the resource adapter doesn't need a proxy endpoint.
86     */
87    public void release()
88    {
89      _listener = null;
90    }
91  }
92  
93
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