View Javadoc
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 // not very sophisticated at this point. Simply get a session 137 // from the pool, put the message in it, and start it. 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 }

This page was automatically generated by Maven