1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.messaging;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.messaging.sender.MessageSender;
28  import com.liferay.portal.kernel.messaging.sender.SingleDestinationMessageSender;
29  
30  /**
31   * <a href="BaseMessageListener.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Michael C. Han
34   *
35   */
36  public abstract class BaseMessageListener implements MessageListener {
37  
38      public BaseMessageListener(
39          SingleDestinationMessageSender statusSender,
40          MessageSender responseSender) {
41  
42          _statusSender = statusSender;
43          _responseSender = responseSender;
44      }
45  
46      public void receive(Message message) {
47          MessageStatus messageStatus = new MessageStatus();
48  
49          messageStatus.startTimer();
50  
51          try {
52              doReceive(message, messageStatus);
53          }
54          catch (Exception e) {
55              _log.error(
56                  "Unable to process request " + message.getDestination(), e);
57  
58              messageStatus.setException(e);
59          }
60          finally {
61              messageStatus.stopTimer();
62  
63              _statusSender.send(messageStatus);
64          }
65      }
66  
67      protected abstract void doReceive(
68              Message message, MessageStatus messageStatus)
69          throws Exception;
70  
71      protected MessageSender getResponseSender() {
72          return _responseSender;
73      }
74  
75      private static Log _log = LogFactoryUtil.getLog(BaseMessageListener.class);
76  
77      private MessageSender _responseSender;
78      private SingleDestinationMessageSender _statusSender;
79  
80  }