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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: JmsTopicConnectionConsumer.java,v 1.5 2004/01/11 02:33:45 tanderson Exp $ 44 */ 45 package org.exolab.jms.client; 46 47 import javax.jms.ConnectionConsumer; 48 import javax.jms.JMSException; 49 import javax.jms.MessageListener; 50 import javax.jms.ServerSessionPool; 51 import javax.jms.Session; 52 import javax.jms.Topic; 53 import javax.jms.TopicConnection; 54 import javax.jms.TopicSession; 55 import javax.jms.TopicSubscriber; 56 57 58 /*** 59 * Client implementation of the <code>javax.jms.ConnectionConsumer</code> 60 * interface, for topics. 61 * 62 * @version $Revision: 1.5 $ $Date: 2004/01/11 02:33:45 $ 63 * @author <a href="mailto:jima@exoffice.com">Jim Alateras</a> 64 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a> 65 */ 66 class JmsTopicConnectionConsumer extends JmsConnectionConsumer { 67 68 /*** 69 * The session to receive messages via. 70 */ 71 private TopicSession _session; 72 73 /*** 74 * The subscriber of messages 75 */ 76 private TopicSubscriber _subscriber; 77 78 79 /*** 80 * Construct a new, non-durable <code>JmsTopicConnectionConsumer</code> 81 * 82 * @param connection the connection which created this 83 * @param topic the topic to access 84 * @param pool the server session pool 85 * @param selector the message selector. May be <code>null</code> 86 * @param maxMessages the maximum number of messages that can be assigned 87 * to a server session at one time 88 * @throws JMSException if the consumer cannot be constructed 89 */ 90 public JmsTopicConnectionConsumer(TopicConnection connection, Topic topic, 91 ServerSessionPool pool, String selector, 92 int maxMessages) 93 throws JMSException { 94 this(connection, topic, null, pool, selector, maxMessages); 95 } 96 97 /*** 98 * Construct a new <code>JmsTopicConnectionConsumer</code> 99 * 100 * @param connection the connection which created this 101 * @param topic the topic to access 102 * @param subscriptionName the durable subscription name. 103 * May be <code>null</code> 104 * @param pool the server session pool 105 * @param selector the message selector. May be <code>null</code> 106 * @param maxMessages the maximum number of messages that can be assigned 107 * to a server session at one time 108 * @throws JMSException if the consumer cannot be constructed 109 */ 110 public JmsTopicConnectionConsumer( 111 TopicConnection connection, Topic topic, String subscriptionName, 112 ServerSessionPool pool, String selector, int maxMessages) 113 throws JMSException { 114 super(pool, maxMessages); 115 116 _session = connection.createTopicSession( 117 false, Session.CLIENT_ACKNOWLEDGE); 118 if (subscriptionName == null) { 119 // transient subscriber 120 _subscriber = _session.createSubscriber(topic, selector, false); 121 } else { 122 // durable subscriber. 123 _subscriber = _session.createDurableSubscriber( 124 topic, subscriptionName, selector, false); 125 } 126 127 _subscriber.setMessageListener(this); 128 } 129 130 /*** 131 * Close the connection consumer, freeing any allocated resources 132 * 133 * @throws JMSException if the consumer cannot be closed 134 */ 135 public void close() throws JMSException { 136 super.close(); 137 try { 138 _subscriber.close(); 139 _session.close(); 140 } finally { 141 _subscriber = null; 142 _session = null; 143 } 144 } 145 }

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