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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 2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42   *
43   * $Id: DurableSubscriber.java,v 1.3 2005/11/18 03:28:00 tanderson Exp $
44   */
45  
46  import javax.naming.Context;
47  import javax.naming.InitialContext;
48  import javax.naming.NamingException;
49  import javax.jms.ConnectionFactory;
50  import javax.jms.Connection;
51  import javax.jms.Topic;
52  import javax.jms.TopicSubscriber;
53  import javax.jms.Session;
54  import javax.jms.Message;
55  import javax.jms.TextMessage;
56  import javax.jms.JMSException;
57  import javax.jms.Destination;
58  
59  
60  /***
61   * Durable <code>TopicSubscriber</code> example.
62   *
63   * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
64   * @version $Revision: 1.3 $ $Date: 2005/11/18 03:28:00 $
65   */
66  public class DurableSubscriber {
67  
68      /***
69       * Main line.
70       *
71       * @param args command line arguments
72       */
73      public static void main(String[] args) {
74          Context context = null;
75          ConnectionFactory factory = null;
76          Connection connection = null;
77          String factoryName = "ConnectionFactory";
78          String topicName = null;
79          Topic topic = null;
80          int count = 1;
81          Session session = null;
82          TopicSubscriber subscriber = null;
83          String subscriptionName = "rubADubSub";
84  
85          if (args.length < 1 || args.length > 2) {
86              System.out.println("usage: DurableSubscriber <topic> [count]");
87              System.exit(1);
88          }
89  
90          topicName = args[0];
91          if (args.length == 2) {
92              count = Integer.parseInt(args[1]);
93          }
94  
95          try {
96              // create the JNDI initial context.
97              context = new InitialContext();
98  
99              // look up the ConnectionFactory
100             factory = (ConnectionFactory) context.lookup(factoryName);
101 
102             // look up the topic
103             topic = (Topic) context.lookup(topicName);
104 
105             // create the connection
106             connection = factory.createConnection();
107 
108             // create the session
109             session = connection.createSession(
110                 false, Session.AUTO_ACKNOWLEDGE);
111 
112             // create the durable subscriber
113             subscriber = session.createDurableSubscriber(
114                 topic, subscriptionName);
115 
116             // start the connection, to enable message receipt
117             connection.start();
118 
119             for (int i = 0; i < count; ++i) {
120                 Message message = subscriber.receive();
121                 if (message instanceof TextMessage) {
122                     TextMessage text = (TextMessage) message;
123                     System.out.println("Received: " + text.getText());
124                 } else if (message != null) {
125                     System.out.println("Received non text message");
126                 }
127             }
128         } catch (JMSException exception) {
129             exception.printStackTrace();
130         } catch (NamingException exception) {
131             exception.printStackTrace();
132         } finally {
133             // close the context
134             if (context != null) {
135                 try {
136                     context.close();
137                 } catch (NamingException exception) {
138                     exception.printStackTrace();
139                 }
140             }
141 
142             // close the connection
143             if (connection != null) {
144                 try {
145                     connection.close();
146                 } catch (JMSException exception) {
147                     exception.printStackTrace();
148                 }
149             }
150         }
151     }
152 
153 }