1   /**
2    * Copyright (c) 2000-2007 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.portlet.messageboards.service.jms;
24  
25  import com.liferay.portal.kernel.util.MethodInvoker;
26  import com.liferay.portal.kernel.util.MethodWrapper;
27  
28  import javax.jms.Message;
29  import javax.jms.MessageListener;
30  import javax.jms.ObjectMessage;
31  import javax.jms.Queue;
32  import javax.jms.QueueConnection;
33  import javax.jms.QueueConnectionFactory;
34  import javax.jms.QueueReceiver;
35  import javax.jms.QueueSession;
36  import javax.jms.Session;
37  
38  import org.apache.commons.logging.Log;
39  import org.apache.commons.logging.LogFactory;
40  
41  /**
42   * <a href="IndexConsumer.java.html"><b><i>View Source</i></b></a>
43   *
44   * @author Brian Wing Shun Chan
45   *
46   */
47  public class IndexConsumer implements MessageListener {
48  
49      public void consume() {
50          try {
51              QueueConnectionFactory qcf = IndexQCFUtil.getQCF();
52              QueueConnection con = qcf.createQueueConnection();
53  
54              QueueSession session = con.createQueueSession(
55                  false, Session.AUTO_ACKNOWLEDGE);
56              Queue queue = (Queue)IndexQueueUtil.getQueue();
57  
58              QueueReceiver subscriber = session.createReceiver(queue);
59  
60              subscriber.setMessageListener(this);
61  
62              con.start();
63          }
64          catch (Exception e) {
65              _log.error(e, e);
66          }
67      }
68  
69      public void onMessage(Message msg) {
70          try {
71              ObjectMessage objMsg = (ObjectMessage)msg;
72  
73              MethodWrapper methodWrapper = (MethodWrapper)objMsg.getObject();
74  
75              _onMessage(methodWrapper);
76          }
77          catch (Exception e) {
78              _log.error(e, e);
79          }
80      }
81  
82      private void _onMessage(MethodWrapper methodWrapper) throws Exception {
83          MethodInvoker.invoke(methodWrapper);
84      }
85  
86      private static Log _log = LogFactory.getLog(IndexConsumer.class);
87  
88  }