sendertoqueue.java

JMS的例子程序

/*
 * @(#)SenderToQueue.java	1.2 00/08/18
 * 
 * Copyright (c) 2000 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */
import javax.jms.*;

/**
 * The SenderToQueue class consists only of a main method, which sends 
 * several messages to a queue.
 * <p>
 * Run this program in conjunction with either SynchQueueReceiver or 
 * AsynchQueueReceiver.  Specify a queue name on the command line when you run 
 * the program.  By default, the program sends one message.  Specify a number 
 * after the queue name to send that number of messages.
 *
 * @author Kim Haase
 * @version 1.2, 08/18/00
 */
public class SenderToQueue {

    /**
     * Main method.
     *
     * @param args	the queue used by the example and, optionally, the
     *                   number of messages to send
     */
    public static void main(String[] args) {
        String                  queueName = null;
        QueueConnectionFactory  queueConnectionFactory = null;
        QueueConnection         queueConnection = null;
        QueueSession            queueSession = null;
        Queue                   queue = null;
        QueueSender             queueSender = null;
        TextMessage             message = null;
        final int               NUM_MSGS;
        final String            MSG_TEXT = new String("Here is a message");
        int                     exitResult = 0;
        
    	if ( (args.length < 1) || (args.length > 2) ) {
    	    System.out.println("Usage: java SenderToQueue <queue_name> [<number_of_messages>]");
    	    System.exit(1);
    	} 
        queueName = new String(args[0]);
        System.out.println("Queue name is " + queueName);
        if (args.length == 2){
            NUM_MSGS = (new Integer(args[1])).intValue();
        } else {
            NUM_MSGS = 1;
        }
    	    
        try {
            queueConnectionFactory = 
                SampleUtilities.getQueueConnectionFactory();
            queueConnection = 
                queueConnectionFactory.createQueueConnection();
            queueSession = queueConnection.createQueueSession(false, 
                Session.AUTO_ACKNOWLEDGE);
            queue = SampleUtilities.getQueue(queueName, queueSession);
    	} catch (Exception e) {
            System.out.println("Connection problem: " + e.toString());
            if (queueConnection != null) {
                try {
                    queueConnection.close();
                } catch (JMSException ee) {} 
            }
    	    System.exit(1);
    	} 

        /*
         * Create sender.
         * Create text message.
         * Send five messages, varying text slightly.
         * Send end-of-messages message.
         * Finally, close connection.
         */
        try {
            queueSender = queueSession.createSender(queue);
            message = queueSession.createTextMessage();
            for (int i = 0; i < NUM_MSGS; i++) {
                message.setText(MSG_TEXT + " " + (i + 1));
                System.out.println("Sending message: " + message.getText());
                queueSender.send(message);
            }

            // Send a non-text control message indicating end of messages.
            queueSender.send(queueSession.createMessage());
        } catch (JMSException e) {
            System.out.println("Exception occurred: " + e.toString());
            exitResult = 1;
        } finally {
            if (queueConnection != null) {
                try {
                    queueConnection.close();
                } catch (JMSException e) {
                    exitResult = 1;
                }
            }
        }
    	SampleUtilities.exit(exitResult);
    }
}