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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 2001-2004 (C) Exoffice Technologies Inc. All Rights Reserved. 42 * 43 * $Id: MessengerService.java,v 1.2 2004/02/02 03:49:20 tanderson Exp $ 44 */ 45 package org.exolab.jmscts.core.service; 46 47 import org.apache.log4j.Category; 48 49 import org.exolab.core.service.Service; 50 import org.exolab.core.service.ServiceException; 51 import org.exolab.core.service.ServiceState; 52 53 import org.exolab.jmscts.core.AsyncExecutor; 54 import org.exolab.jmscts.core.ExecutionListener; 55 56 57 /*** 58 * This class enables messaging operations to be performed in a separate 59 * JVM 60 * <p> 61 * This service is dependent on the 62 * {@link org.exolab.core.util.RmiRegistryService} and 63 * {@link ExecutionMonitorService}. These must be initialised prior to 64 * starting this service 65 * 66 * @version $Revision: 1.2 $ $Date: 2004/02/02 03:49:20 $ 67 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a> 68 */ 69 public class MessengerService extends Service implements ExecutionListener { 70 71 /*** 72 * The service name 73 */ 74 public static final String NAME = "MessengerService"; 75 76 /*** 77 * The singleton instance 78 */ 79 private static MessengerService _instance = null; 80 81 /*** 82 * The RMI registry port 83 */ 84 private int _port = 0; 85 86 /*** 87 * The name of the server bound in the RMI registry 88 */ 89 private String _name = null; 90 91 /*** 92 * The executor 93 */ 94 private AsyncExecutor _executor = null; 95 96 /*** 97 * The logger 98 */ 99 private static final Category log = 100 Category.getInstance(MessengerService.class); 101 102 103 /*** 104 * Construct a new <code>MessengerService</code> 105 * 106 * @param port the RMI registry port 107 */ 108 public MessengerService(int port) { 109 super(NAME); 110 _port = port; 111 } 112 113 /*** 114 * Start the service 115 * 116 * @throws ServiceException if the service can't be started 117 */ 118 public synchronized void start() throws ServiceException { 119 if (!getState().isRunning()) { 120 try { 121 String args = "-port " + _port; 122 _executor = new AsyncExecutor(MessengerServer.class, args, 123 _port); 124 _executor.addListener(this); 125 _executor.run(); 126 } catch (Exception exception) { 127 throw new ServiceException(exception.getMessage()); 128 } 129 } 130 super.start(); 131 } 132 133 /*** 134 * Stop the service 135 * 136 * @throws ServiceException if the service can't be stopped 137 */ 138 public synchronized void stop() throws ServiceException { 139 super.stop(); 140 try { 141 _executor.stop(); 142 } catch (Exception exception) { 143 throw new ServiceException(exception.getMessage()); 144 } 145 } 146 147 /*** 148 * Event handler invoked if the application cannot be started 149 * 150 * @param throwable the exception thrown by the application 151 */ 152 public void failed(Throwable throwable) { 153 log.error("MessengerServer failed with error", throwable); 154 setState(ServiceState.STOPPED); 155 _executor = null; 156 } 157 158 /*** 159 * Event handler invoked when the application starts 160 */ 161 public void started() { 162 log.debug("MessengerServer started"); 163 } 164 165 /*** 166 * Event handler invoked when the application stops 167 * 168 * @param status the exit status of the application 169 */ 170 public void stopped(int status) { 171 log.debug("MessengerServer stopped"); 172 setState(ServiceState.STOPPED); 173 _executor = null; 174 } 175 176 /*** 177 * Event handler invoked when the application throws an exception just 178 * prior to termination 179 * 180 * @param throwable the exception thrown by the application 181 */ 182 public void error(Throwable throwable) { 183 log.error("MessengerServer failed with error", throwable); 184 } 185 186 }

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