1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2000-2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: JmsConnectionConsumer.java,v 1.4 2004/01/11 02:33:44 tanderson Exp $
44 */
45 package org.exolab.jms.client;
46
47 import javax.jms.ConnectionConsumer;
48 import javax.jms.JMSException;
49 import javax.jms.Message;
50 import javax.jms.MessageListener;
51 import javax.jms.ServerSession;
52 import javax.jms.ServerSessionPool;
53 import javax.jms.Session;
54 import javax.jms.Topic;
55 import javax.jms.TopicConnection;
56 import javax.jms.TopicSession;
57
58 import org.apache.commons.logging.Log;
59 import org.apache.commons.logging.LogFactory;
60
61
62 /***
63 * Implementation of the <code>javax.jms.ConnectionConsumer</code> interface
64 *
65 * @version $Revision: 1.4 $ $Date: 2004/01/11 02:33:44 $
66 * @author <a href="mailto:jima@exoffice.com">Jim Alateras</a>
67 */
68 abstract class JmsConnectionConsumer
69 implements ConnectionConsumer, MessageListener {
70
71 /***
72 * The server session pool
73 */
74 private ServerSessionPool _pool;
75
76 /***
77 * The maximum number of messages that can be assigned to a server session
78 * at one time
79 */
80 private final int _maxMessages;
81
82 /***
83 * The logger
84 */
85 private static final Log _log =
86 LogFactory.getLog(JmsConnectionConsumer.class);
87
88
89 /***
90 * Construct a new <code>JmsConnectionConsumer</code>
91 *
92 * @param pool the server session pool
93 * @param maxMessages maximum number of messages that can be assigned to a
94 * server session at one time
95 */
96 public JmsConnectionConsumer(ServerSessionPool pool, int maxMessages) {
97 if (pool == null) {
98 throw new IllegalArgumentException("Argument 'pool' is null");
99 }
100 if (maxMessages <= 0) {
101 throw new IllegalArgumentException(
102 "Argument 'maxMessages' must be > 0");
103 }
104 _pool = pool;
105 _maxMessages = maxMessages;
106 }
107
108 /***
109 * Get the server session pool associated with this connection consumer
110 *
111 * @return the server session pool used by this connection consumer
112 */
113 public ServerSessionPool getServerSessionPool() {
114 return _pool;
115 }
116
117 /***
118 * Close the connection consumer, freeing any allocated resources
119 *
120 * @throws JMSException if the consumer cannot be closed
121 */
122 public void close() throws JMSException {
123 _pool = null;
124 }
125
126 /***
127 * Impmentation of MessageListener.onMessage, which will receive
128 * messages from the server.
129 * In this most simple case, it loads each message into a server session
130 * and calls the start method.
131 *
132 * @param message the message
133 */
134 public void onMessage(Message message) {
135 try {
136
137
138 ServerSession serverSession = _pool.getServerSession();
139 JmsSession session = (JmsSession) serverSession.getSession();
140 message.acknowledge();
141 session.addMessage(message);
142 serverSession.start();
143 } catch (Exception exception) {
144 _log.error(exception, exception);
145 }
146 }
147
148 }