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Java > Open Source Codes > Listener


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 jima@intalio.com.
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: Listener.java,v 1.1 2005/04/08 13:42:48 tanderson Exp $
44  */
45
46 import java.io.BufferedReader JavaDoc;
47 import java.io.IOException JavaDoc;
48 import java.io.InputStreamReader JavaDoc;
49
50 import javax.naming.Context JavaDoc;
51 import javax.naming.InitialContext JavaDoc;
52 import javax.naming.NamingException JavaDoc;
53
54 import javax.jms.JMSException JavaDoc;
55 import javax.jms.Destination JavaDoc;
56 import javax.jms.Connection JavaDoc;
57 import javax.jms.ConnectionFactory JavaDoc;
58 import javax.jms.MessageConsumer JavaDoc;
59 import javax.jms.Session JavaDoc;
60
61
62 /**
63  * Asynchronous <code>MessageConsumer</code> example
64  *
65  * @author <a HREF="mailto:tma@netspace.net.au">Tim Anderson</a>
66  * @version $Revision: 1.1 $ $Date: 2005/04/08 13:42:48 $
67  */
68 public class Listener {
69
70     /**
71      * Main line.
72      *
73      * @param args command line arguments
74      */
75     public static void main(String JavaDoc[] args) {
76         Context JavaDoc context = null;
77         ConnectionFactory JavaDoc factory = null;
78         Connection JavaDoc connection = null;
79         String JavaDoc factoryName = "ConnectionFactory";
80         String JavaDoc destName = null;
81         Destination JavaDoc dest = null;
82         Session JavaDoc session = null;
83         MessageConsumer JavaDoc receiver = null;
84         String JavaDoc text = "Message ";
85         BufferedReader JavaDoc waiter = null;
86
87         if (args.length != 1) {
88             System.out.println("usage: Listener <destination>");
89             System.exit(1);
90         }
91
92         destName = args[0];
93
94         // Create the JNDI initial context.
95 try {
96             context = new InitialContext JavaDoc();
97         } catch (NamingException JavaDoc exception) {
98             System.err.println("Failed to create initial JNDI context: "
99                                + exception);
100             System.exit(1);
101         }
102
103         // Look up the ConnectionFactory
104 try {
105             factory = (ConnectionFactory JavaDoc) context.lookup(factoryName);
106         } catch (NamingException JavaDoc exception) {
107             System.err.println("Failed to look up connection factory: "
108                                + exception);
109             System.exit(1);
110         }
111
112         // Look up the Desination
113 try {
114             dest = (Destination JavaDoc) context.lookup(destName);
115         } catch (NamingException JavaDoc exception) {
116             System.err.println("Failed to look up destination: " + exception);
117             System.exit(1);
118         }
119
120         try {
121             // create the connection
122 connection = factory.createConnection();
123
124             // create the session
125 session = connection.createSession(
126                 false, Session.AUTO_ACKNOWLEDGE);
127
128             // create the receiver
129 receiver = session.createConsumer(dest);
130
131             // register a listener
132 receiver.setMessageListener(new SampleListener());
133
134             // start the connection, to enable message receipt
135 connection.start();
136
137             System.out.println("Waiting for messages...");
138             System.out.println("Press [return] to quit");
139
140             waiter = new BufferedReader JavaDoc(new InputStreamReader JavaDoc(System.in));
141             waiter.readLine();
142         } catch (JMSException JavaDoc exception) {
143             System.err.println("JMS exception: " + exception);
144             System.exit(1);
145         } catch (IOException JavaDoc exception) {
146             System.err.println("I/O exception: " + exception);
147             System.exit(1);
148         } finally {
149             if (connection != null) {
150                 try {
151                     connection.close();
152                 } catch (JMSException JavaDoc exception) {
153                     System.err.println("Failed to close connection: "
154                                        + exception);
155                 }
156             }
157         }
158         System.exit(0);
159     }
160 }
161
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