durablesubscriber.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: DurableSubscriber.java,v 1.2 2005/04/08 13:42:48 tanderson Exp $
 */

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.jms.ConnectionFactory;
import javax.jms.Connection;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;
import javax.jms.Session;
import javax.jms.Message;
import javax.jms.TextMessage;
import javax.jms.JMSException;


/**
 * Durable <code>TopicSubscriber</code> example.
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.2 $ $Date: 2005/04/08 13:42:48 $
 */
public class DurableSubscriber {

    /**
     * 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 topicName = null;
        Topic topic = null;
        int count = 1;
        Session session = null;
        TopicSubscriber subscriber = null;
        String subscriptionName = "rubADubSub";

        if (args.length < 1 || args.length > 2) {
            System.out.println("usage: DurableSubscriber <topic> [count]");
            System.exit(1);
        }

        topicName = args[0];
        if (args.length == 2) {
            count = Integer.parseInt(args[1]);
        }

        // 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 topic
        try {
            topic = (Topic) context.lookup(topicName);
        } catch (NamingException exception) {
            System.err.println("Failed to look up topic: " + exception);
            System.exit(1);
        }

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

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

            // create the durable subscriber
            subscriber = session.createDurableSubscriber(
                topic, subscriptionName);

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

            for (int i = 0; i < count; ++i) {
                Message message = subscriber.receive();
                if (message instanceof TextMessage) {
                    TextMessage text = (TextMessage) message;
                    System.out.println("Received: " + text.getText());
                } else if (message != null) {
                    System.out.println("Received non text message");
                }
            }

        } catch (JMSException exception) {
            System.err.println("JMS 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);
    }

}