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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 2000-2003 (C) Exoffice Technologies Inc. All Rights Reserved. 42 * 43 * $Id: HttpJmsSessionSender.java,v 1.11 2003/08/30 08:00:54 tanderson Exp $ 44 * 45 * Date Author Changes 46 * $Date jimm Created 47 */ 48 49 50 package org.exolab.jms.server.http; 51 52 import java.util.Vector; 53 54 import javax.jms.Message; 55 56 import org.apache.commons.logging.Log; 57 import org.apache.commons.logging.LogFactory; 58 59 import org.exolab.core.http.HttpClient; 60 import org.exolab.jms.client.JmsMessageListener; 61 import org.exolab.jms.message.MessageImpl; 62 import org.exolab.jms.server.ClientDisconnectionException; 63 import org.exolab.jms.server.JmsServerSession; 64 65 66 /*** 67 * This class contains the http connection to a receiver or subscriber 68 * for passing messages. 69 * 70 * @version $Revision: 1.11 $ $Date: 2003/08/30 08:00:54 $ 71 * @author <a href="mailto:mourikis@exolab.org">Jim Mourikis</a> 72 * @see org.exolab.jms.server.JmsServerSession 73 * @see org.exolab.core.http.HttpClient 74 */ 75 public class HttpJmsSessionSender implements JmsMessageListener { 76 77 /*** 78 * The session connection 79 */ 80 private HttpJmsSessionConnection _connection; 81 82 /*** 83 * The connection to the client servlet 84 */ 85 private HttpClient _client; 86 87 /*** 88 * The session instance 89 */ 90 private JmsServerSession _session; 91 92 /*** 93 * The host the client session runs on 94 */ 95 private String _host; 96 97 /*** 98 * The port the client session is listening on 99 */ 100 private String _port; 101 102 /*** 103 * Pinger used to ping subscribers and detect disconnections 104 */ 105 private HttpJmsSessionPinger _pinger; 106 107 /*** 108 * The logger 109 */ 110 private static final Log _log = LogFactory.getLog( 111 HttpJmsSessionSender.class); 112 113 114 /*** 115 * Create a connection to the client listener for sending JmsMessages. 116 * 117 * @param connection the session connection 118 * @param client the connection to the client. 119 * @param session the session this connection belongs to 120 * @param host the host the client session runs on 121 * @param port the port the client session is listening on 122 */ 123 public HttpJmsSessionSender(HttpJmsSessionConnection connection, 124 HttpClient client, JmsServerSession session, 125 String host, String port) { 126 _connection = connection; 127 _client = client; 128 _session = session; 129 _host = host; 130 _port = port; 131 session.setMessageListener(this); 132 _pinger = new HttpJmsSessionPinger(this); 133 new Thread(_pinger).start(); 134 } 135 136 /*** 137 * Send a message to a listener. 138 * 139 * @param message The message to send. 140 */ 141 public void onMessage(Message message) { 142 try { 143 if (_client != null) { 144 Vector v = new Vector(2); 145 v.add(_session.getSessionId()); 146 v.add((MessageImpl) message); 147 _pinger.reset(); 148 synchronized (_client) { 149 _client.send(v, _host, _port); 150 Vector reply = (Vector) _client.receive(); 151 } 152 } 153 } catch (Exception err) { 154 _log.debug("Failed to send message to client", err); 155 throw new ClientDisconnectionException(err.getMessage()); 156 } 157 } 158 159 /*** 160 * Send the collection of messages to the client. This is used for async 161 * message delivery. 162 * 163 * @param messages - collection of MessageImpl objects 164 */ 165 public void onMessages(Vector messages) { 166 try { 167 if (_client != null) { 168 Vector v = new Vector(2); 169 v.add(_session.getSessionId()); 170 v.add(messages); 171 _pinger.reset(); 172 synchronized (_client) { 173 _client.send(v, _host, _port); 174 Vector reply = (Vector) _client.receive(); 175 } 176 } 177 } catch (Exception err) { 178 _log.debug("Failed to send messages to client", err); 179 throw new ClientDisconnectionException(err.getMessage()); 180 } 181 } 182 183 /*** 184 * Notify the specified client that a message avaiable. 185 * 186 * @param clinet - the client identity 187 */ 188 public void onMessageAvailable(long clientId) { 189 try { 190 if (_client != null) { 191 Vector v = new Vector(2); 192 v.add(_session.getSessionId()); 193 v.add(new Long(clientId)); 194 _pinger.reset(); 195 _client.send(v, _host, _port); 196 Vector reply = (Vector) _client.receive(); 197 } 198 } catch (Exception err) { 199 _log.debug("Failed to notify client", err); 200 throw new ClientDisconnectionException(err.getMessage()); 201 } 202 } 203 204 /*** 205 * Ping the client to see if its still active. 206 */ 207 protected void ping() { 208 try { 209 if (_client != null) { 210 Vector v = new Vector(1); 211 v.add(_session.getSessionId()); 212 synchronized (_client) { 213 _client.send(v, _host, _port); 214 Vector reply = (Vector) _client.receive(); 215 } 216 } 217 } catch (Exception err) { 218 _log.debug("Failed to ping client", err); 219 throw new ClientDisconnectionException(err.getMessage()); 220 } 221 } 222 223 /*** 224 * Remove the callback from the JmsServerSession. 225 */ 226 public void close() { 227 HttpClient client = _client; 228 if (client != null) { 229 synchronized (client) { 230 try { 231 client.send("close", _host, _port); 232 } catch (Exception ignore) { 233 } 234 } 235 } 236 237 JmsServerSession session = _session; 238 _session = null; 239 if (session != null) { 240 session.setMessageListener(null); 241 _connection.disconnect(session); 242 _pinger.close(); 243 _pinger = null; 244 } 245 _host = null; 246 _port = null; 247 _client = null; 248 } 249 250 } //-- HttpJmsSessionSender

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