listener.java

一个java方面的消息订阅发送的源码

/**
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "Exolab"
 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2004 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: Listener.java,v 1.1 2005/04/08 13:42:48 tanderson Exp $
 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

import javax.jms.JMSException;
import javax.jms.Destination;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.MessageConsumer;
import javax.jms.Session;


/**
 * Asynchronous <code>MessageConsumer</code> example
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.1 $ $Date: 2005/04/08 13:42:48 $
 */
public class Listener {

    /**
     * Main line.
     *
     * @param args command line arguments
     */
    public static void main(String[] args) {
        Context context = null;
        ConnectionFactory factory = null;
        Connection connection = null;
        String factoryName = "ConnectionFactory";
        String destName = null;
        Destination dest = null;
        Session session = null;
        MessageConsumer receiver = null;
        String text = "Message ";
        BufferedReader waiter = null;

        if (args.length != 1) {
            System.out.println("usage: Listener <destination>");
            System.exit(1);
        }

        destName = args[0];

        // Create the JNDI initial context.
        try {            
            context = new InitialContext();
        } catch (NamingException exception) {
            System.err.println("Failed to create initial JNDI context: "
                               + exception);
            System.exit(1);
        }

        // Look up the ConnectionFactory
        try {
            factory = (ConnectionFactory) context.lookup(factoryName);
        } catch (NamingException exception) {
            System.err.println("Failed to look up connection factory: "
                               + exception);
            System.exit(1);
        }

        // Look up the Desination
        try {
            dest = (Destination) context.lookup(destName);
        } catch (NamingException exception) {
            System.err.println("Failed to look up destination: " + exception);
            System.exit(1);
        }

        try {
            // create the connection
            connection = factory.createConnection();

            // create the session
            session = connection.createSession(
                false, Session.AUTO_ACKNOWLEDGE);

            // create the receiver
            receiver = session.createConsumer(dest);

            // register a listener
            receiver.setMessageListener(new SampleListener());

            // start the connection, to enable message receipt
            connection.start();

            System.out.println("Waiting for messages...");
            System.out.println("Press [return] to quit");

            waiter = new BufferedReader(new InputStreamReader(System.in));
            waiter.readLine();
        } catch (JMSException exception) {
            System.err.println("JMS exception: " + exception);
            System.exit(1);
        } catch (IOException exception) {
            System.err.println("I/O exception: " + exception);
            System.exit(1);
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (JMSException exception) {
                    System.err.println("Failed to close connection: "
                                       + exception);
                }
            }
        }
        System.exit(0);
    }
}