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Java > Open Source Codes > org > exolab > jms > client > JmsTemporaryTopic


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: JmsTemporaryTopic.java,v 1.1 2004/11/26 01:50:40 tanderson Exp $
44  */
45 package org.exolab.jms.client;
46
47 import java.io.Externalizable JavaDoc;
48 import java.io.IOException JavaDoc;
49 import java.io.ObjectInput JavaDoc;
50 import java.io.ObjectOutput JavaDoc;
51
52 import javax.jms.JMSException JavaDoc;
53 import javax.jms.TemporaryTopic JavaDoc;
54 import javax.jms.Topic JavaDoc;
55 import javax.naming.Reference JavaDoc;
56 import javax.naming.Referenceable JavaDoc;
57
58 import org.exolab.jms.common.uuid.UUID;
59
60
61 /**
62  * A temporary topic is created by a client through a session and has
63  * a lifetime of the session's connection.
64  *
65  * @version $Revision: 1.1 $ $Date: 2004/11/26 01:50:40 $
66  * @author <a HREF="mailto:jima@exoffice.com">Jim Alateras</a>
67  */
68 public class JmsTemporaryTopic
69     extends JmsTopic
70     implements TemporaryTopic JavaDoc, JmsTemporaryDestination, Externalizable JavaDoc, Referenceable JavaDoc {
71
72     /**
73      * Used for serialization
74      */
75     static final long serialVersionUID = 2;
76
77     /**
78      * Contains the id to the connection that created this temporary
79      * destination. Note that the actual connection object is not
80      * streamed across, only the identifier.
81      */
82     private long _connectionId;
83
84     /**
85      * Reference to the connection that owns this deztination.
86      */
87     transient private JmsConnection _connection = null;
88
89
90     /**
91      * Need a default constructor for the serialization
92      */
93     public JmsTemporaryTopic() {
94         super(TEMP_TOPIC_PREFIX + UUID.next());
95     }
96
97     // implementation of TemporaryTopic.delete
98 public void delete()
99         throws JMSException JavaDoc {
100         // unregisterthe temporary topic from the owning destination
101 _connection.deleteTemporaryDestination(this);
102     }
103
104     // implementation of JmsTemporaryDestination.setOwningConnection
105 public void setOwningConnection(JmsConnection connection) {
106         _connection = connection;
107         _connectionId = _connection.getConnectionId();
108     }
109
110     // implementation of JmsTemporaryDestination.getOwningConnection
111 public JmsConnection getOwningConnection() {
112         return _connection;
113     }
114
115     // implementation of JmsTemporaryDestination.getConnectionId
116 public long getConnectionId() {
117         return _connectionId;
118     }
119
120     // implementation of JmsTemporaryDestination.validForConnection
121 public boolean validForConnection(JmsConnection connection) {
122         boolean result = false;
123
124         if (connection != null
125             && connection.getConnectionId() == _connectionId) {
126             result = true;
127         }
128
129         return result;
130     }
131
132     // implementation of Referenceable.getReference
133 public Reference JavaDoc getReference() {
134         // should never be called for temp destination
135 return null;
136     }
137
138     // implementation of Externalizable.writeExternal
139 public void writeExternal(ObjectOutput JavaDoc stream)
140         throws IOException JavaDoc {
141         stream.writeLong(serialVersionUID);
142         stream.writeLong(_connectionId);
143         super.writeExternal(stream);
144     }
145
146     // implementation of Externalizable.writeExternal
147 public void readExternal(ObjectInput JavaDoc stream)
148         throws IOException JavaDoc, ClassNotFoundException JavaDoc {
149         long version = stream.readLong();
150         if (version == serialVersionUID) {
151             _connectionId = stream.readLong();
152             super.readExternal(stream);
153         } else {
154             throw new IOException JavaDoc("JmsTemporaryTopic with version " +
155                 version + " is not supported.");
156         }
157     }
158 }
159
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