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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 tma@netspace.net.au. 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 2003-2004 (C) Exoffice Technologies Inc. All Rights Reserved. 42 * 43 * $Id: DelegatingListener.java,v 1.2 2004/01/31 13:44:24 tanderson Exp $ 44 */ 45 package org.exolab.jmscts.core; 46 47 import java.util.ArrayList; 48 import java.util.Iterator; 49 import java.util.List; 50 51 import javax.jms.Message; 52 import javax.jms.MessageListener; 53 54 55 /*** 56 * A listener which delegates to one or more registered listeners 57 * 58 * @version $Revision: 1.2 $ $Date: 2004/01/31 13:44:24 $ 59 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a> 60 */ 61 public class DelegatingListener implements MessageListener { 62 63 /*** 64 * The listeners 65 */ 66 private List _listeners = new ArrayList(); 67 68 69 /*** 70 * Construct a new <code>DelegatingListener</code> 71 */ 72 public DelegatingListener() { 73 } 74 75 /*** 76 * Construct a new <code>DelegatingListener</code>, and register 77 * an initial listener 78 * 79 * @param listener the listener to register 80 */ 81 public DelegatingListener(MessageListener listener) { 82 addMessageListener(listener); 83 } 84 85 /*** 86 * Invokes <code>MessageListener.onMessage()</code> for each of 87 * the registered listeners 88 * 89 * @param message the received message 90 */ 91 public void onMessage(Message message) { 92 Iterator iterator = _listeners.iterator(); 93 while (iterator.hasNext()) { 94 MessageListener listener = (MessageListener) iterator.next(); 95 listener.onMessage(message); 96 } 97 } 98 99 /*** 100 * Register a message listener 101 * 102 * @param listener the listener to register 103 */ 104 public void addMessageListener(MessageListener listener) { 105 _listeners.add(listener); 106 } 107 108 /*** 109 * Deregister a message listener 110 * 111 * @param listener the listener to deregister 112 */ 113 public void removeMessageListener(MessageListener listener) { 114 _listeners.remove(listener); 115 } 116 117 }

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