1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.kernel.messaging;
16  
17  import com.liferay.portal.kernel.log.Log;
18  import com.liferay.portal.kernel.log.LogFactoryUtil;
19  import com.liferay.portal.kernel.messaging.sender.MessageSender;
20  import com.liferay.portal.kernel.messaging.sender.SingleDestinationMessageSender;
21  
22  /**
23   * <a href="BaseMessageListener.java.html"><b><i>View Source</i></b></a>
24   *
25   * @author Michael C. Han
26   */
27  public abstract class BaseMessageListener implements MessageListener {
28  
29      public BaseMessageListener() {
30      }
31  
32      /**
33       * @deprecated
34       */
35      public BaseMessageListener(
36          SingleDestinationMessageSender statusSender,
37          MessageSender responseSender) {
38  
39          _statusSender = statusSender;
40          _responseSender = responseSender;
41      }
42  
43      public void receive(Message message) {
44          MessageStatus messageStatus = new MessageStatus();
45  
46          messageStatus.startTimer();
47  
48          try {
49              doReceive(message, messageStatus);
50          }
51          catch (Exception e) {
52              _log.error(
53                  "Unable to process request " + message.getDestinationName(), e);
54  
55              messageStatus.setException(e);
56          }
57          finally {
58              messageStatus.stopTimer();
59  
60              _statusSender.send(messageStatus);
61          }
62      }
63  
64      public void setResponseSender(MessageSender responseSender) {
65          _responseSender = responseSender;
66      }
67  
68      public void setStatusSender(SingleDestinationMessageSender statusSender) {
69          _statusSender = statusSender;
70      }
71  
72      protected abstract void doReceive(
73              Message message, MessageStatus messageStatus)
74          throws Exception;
75  
76      protected MessageSender getResponseSender() {
77          return _responseSender;
78      }
79  
80      private static Log _log = LogFactoryUtil.getLog(BaseMessageListener.class);
81  
82      private MessageSender _responseSender;
83      private SingleDestinationMessageSender _statusSender;
84  
85  }