Sends several messages to a queue : Java Message Service JMS « J2EE « Java
Sends several messages to a queue
/*
* @(#)SenderToQueue.java 1.3 02/05/02
*
* Copyright (c) 2000-2002 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 SynchQueueExample or
* AsynchQueueExample. 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;
ConnectionFactory connectionFactory = null;
Connection connection = null;
Session session = null;
Queue queue = null;
MessageProducer msgProducer = 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 {
connectionFactory =
SampleUtilities.getConnectionFactory();
connection =
connectionFactory.createConnection();
session = connection.createSession(false,
Session.AUTO_ACKNOWLEDGE);
queue = SampleUtilities.getQueue(queueName, session);
} catch (Exception e) {
System.out.println("Connection problem: " + e.toString());
if (connection != null) {
try {
connection.close();
} catch (JMSException ee) {}
}
System.exit(1);
}
/*
* Create producer.
* Create text message.
* Send five messages, varying text slightly.
* Send end-of-messages message.
* Finally, close connection.
*/
try {
msgProducer = session.createProducer(queue);
message = session.createTextMessage();
for (int i = 0; i < NUM_MSGS; i++) {
message.setText(MSG_TEXT + " " + (i + 1));
System.out.println("Sending message: " + message.getText());
msgProducer.send(message);
}
// Send a non-text control message indicating end of messages.
msgProducer.send(session.createMessage());
} catch (JMSException e) {
System.out.println("Exception occurred: " + e.toString());
exitResult = 1;
} finally {
if (connection != null) {
try {
connection.close();
} catch (JMSException e) {
exitResult = 1;
}
}
}
SampleUtilities.exit(exitResult);
}
}
jms.zip( 65 k)