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Java > Open Source Codes > org > mr > kernel > services > DeadLetterHandler


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
4  * <a HREF="mailto: support@coridan.com ">support@coridan.com</a>
5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Amir Shevat.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
21  *
22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
28  * allow use of your version of this file only under the terms of the LGPL
29  * License and not to allow others to use your version of this file under
30  * the MPL, indicate your decision by deleting the provisions above and
31  * replace them with the notice and other provisions required by the LGPL.
32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */
46 package org.mr.kernel.services;
47
48 import java.util.Timer JavaDoc;
49 import java.util.TimerTask JavaDoc;
50 import java.util.logging.Logger JavaDoc;
51
52 import org.apache.commons.logging.LogFactory;
53 import org.mr.MantaAgent;
54 import org.mr.MantaAgentConstants;
55 import org.mr.core.protocol.MantaBusMessage;
56
57 /**
58  * This object takes care of dead messages
59  * @version 1.0
60  * @since May 8, 2006
61  * @author Amir Shevat
62  *
63  */
64 public class DeadLetterHandler {
65     private static Timer JavaDoc timer = new Timer JavaDoc();
66     private static ServiceProducer serviceProducer = null;
67     
68     final public synchronized static void HandleDeadMessage(MantaBusMessage msg){
69         if(serviceProducer == null){
70             MantaService ms = MantaAgent.getInstance().getService(
71                     "deadLetter",MantaService.SERVICE_TYPE_TOPIC);
72             
73             serviceProducer = ServiceProducer.createNew(ms);
74         }
75         // send the message to the dead letter destination
76 msg.setValidUntil(Long.MAX_VALUE);
77         msg.setDeliveryMode(MantaAgentConstants.NON_PERSISTENT);
78         msg.setSource(serviceProducer);
79         
80         final MantaBusMessage dead = msg;
81         
82         TimerTask JavaDoc timerTask = new TimerTask JavaDoc(){
83              public void run(){
84                  try {
85                     MantaAgent.getInstance().publish(dead, (ServiceProducer) dead.getSource());
86                     LogFactory.getLog("QueueDispatcher").info("DeadLetterHandler sent message to 'deadLetter' topic msg="+dead);
87                 } catch (Exception JavaDoc e) {
88                     Logger.getLogger("DeadLetterHandler").warning("DeadLetterHandler failed "+dead);
89                 }
90              }
91         };
92         
93         timer.schedule(timerTask, 2);
94     }
95
96 }
97
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