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: IpcJmsSessionList.java,v 1.6 2003/08/07 13:33:09 tanderson Exp $
44 *
45 * Date Author Changes
46 * $Date jimm Created
47 */
48
49
50 package org.exolab.jms.server.mipc;
51
52 import java.io.IOException;
53 import java.util.HashMap;
54 import java.util.Iterator;
55
56 import org.exolab.core.mipc.MultiplexConnectionIfc;
57 import org.exolab.core.mipc.ObjectChannel;
58 import org.exolab.jms.server.JmsServerSession;
59
60
61 /***
62 * Keep a list of all session Client connections for a client. All sessions
63 * for a client are multiplexed through a single connection. Ensure the
64 * same connection is used for all the clients sessions, and that the
65 * connection is not destroyed until the last session for the client is
66 * shutdown.
67 *
68 * @version $Revision: 1.6 $ $Date: 2003/08/07 13:33:09 $
69 * @author <a href="mailto:mourikis@exolab.org">Jim Mourikis</a>
70 * @see org.exolab.jms.server.mipc.IpcJmsServer
71 * @see org.exolab.jms.server.mipc.IpcJmsSessionSender
72 */
73 public class IpcJmsSessionList {
74
75 /***
76 * The client connection.
77 */
78 private ObjectChannel _client;
79
80 /***
81 * The list of session senders
82 */
83 private HashMap _list;
84
85
86 /***
87 * Create a connection to the client listener for sending JmsMessages.
88 *
89 * @param connection The MultiplexConnection between client and server
90 * @exception IOException If a connection error results.
91 *
92 */
93 public IpcJmsSessionList(MultiplexConnectionIfc connection)
94 throws IOException {
95 _list = new HashMap(10);
96 _client = new ObjectChannel("message", connection);
97 }
98
99 /***
100 * Add a new session sender for the client. If its not already active.
101 *
102 * @param session The session to add a notifier on
103 */
104 public synchronized void add(JmsServerSession session) {
105 if (!_list.containsKey(session.getSessionId())) {
106 _list.put(session.getSessionId(),
107 new IpcJmsSessionSender(_client, session));
108 }
109 }
110
111 /***
112 * Remove a sesson notifier. If this is the last session for this client
113 * close the client connection.
114 *
115 * @param session The session to remove the notifier from
116 * @return boolean True there are no more connections for this client
117 *
118 */
119 public synchronized boolean remove(JmsServerSession session) {
120 IpcJmsSessionSender sender =
121 (IpcJmsSessionSender) _list.remove(session.getSessionId());
122 boolean result = false;
123
124 if (sender != null) {
125 sender.close();
126 }
127 if (_list.isEmpty()) {
128 closeConnection();
129 _list = null;
130 result = true;
131 }
132
133 return result;
134 }
135
136 /***
137 * Remove all session notfiers and close the client connection.
138 */
139 public synchronized void removeAll() {
140 Iterator iterator = _list.values().iterator();
141 while (iterator.hasNext()) {
142 IpcJmsSessionSender sender = (IpcJmsSessionSender) iterator.next();
143 sender.close();
144 }
145 _list.clear();
146 closeConnection();
147 _list = null;
148 }
149
150
151 private void closeConnection() {
152 if (_client != null) {
153 try {
154 _client.close();
155 } catch (IOException ignore) {
156 }
157 _client = null;
158 }
159 }
160
161 }