Fetches one or more messages from a queue using synchronous message delivery
/*
* @(#)SynchQueueExample.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 SynchQueueExample class consists only of a main method, which fetches
* one or more messages from a queue using synchronous message delivery. Run
* this program in conjunction with SenderToQueue. Specify a queue name on the
* command line when you run the program.
* <p>
* The program calls methods in the SampleUtilities class.
*
* @author Kim Haase
* @version 1.7, 08/14/00
*/
public class SynchQueueExample {
/**
* Main method.
*
* @param args the queue used by the example
*/
public static void main(String[] args) {
String queueName = null;
ConnectionFactory connectionFactory = null;
Connection connection = null;
Session session = null;
Queue queue = null;
MessageConsumer msgConsumer = null;
TextMessage message = null;
int exitResult = 0;
/*
* Read queue name from command line and display it.
*/
if (args.length != 1) {
System.out.println("Usage: java SynchQueueExample <queue_name>");
System.exit(1);
}
queueName = new String(args[0]);
System.out.println("Queue name is " + queueName);
/*
* Obtain connection factory.
* Create connection.
* Create session from connection; false means session is not
* transacted.
* Obtain queue name.
*/
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 consumer, then start message delivery.
* Receive all text messages from queue until
* a non-text message is received indicating end of
* message stream.
* Close connection and exit.
*/
try {
msgConsumer = session.createConsumer(queue);
connection.start();
while (true) {
Message m = msgConsumer.receive();
if (m instanceof TextMessage) {
message = (TextMessage) m;
System.out.println("Reading message: " + message.getText());
} else {
// Non-text control message indicates end of messages.
break;
}
}
} 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)Related examples in the same category
| 1. | The mqping utility is similar to the Unix ping utility in some regards | | |
| 2. | This example illustrates how JMS (Java Message Service) API can be used in a Java applet | | |
| 3. | This example illustrates how JMS can be used to create a simple chat application | | |
| 4. | The UniversalClient example is a basic 'client' application that uses the JMS 1.1 APIs | | |
| 5. | How to write a GUI application that uses a JMS QueueBrowser to browse the contents of a queue | | |
| 6. | This example is a simple JMS client application | | |
| 7. | Demonstrates a simple end-to-end "Hello World" JMS example that can be compiled and run with the Sun Java(tm) System Message Queue product | | |
| 8. | The BrokerMetrics example is a JMS application that monitors the Sun Java(tm) System Message Queue broker | | |
| 9. | The DestListMetrics example is a JMS application that monitors the destinations on a Sun Java(tm) System Message Queue broker | | |
| 10. | The DestMetrics example is a JMS application that monitors a destination on a Sun Java(tm) System Message Queue broker | | |
| 11. | The VMMetrics example is a JMS application that monitors the Java VM used by the Sun Java(tm) System Message Queue broker | | |
| 12. | MQ Cluster Monitor | | |
| 13. | The TopicSelectors class demonstrates the use of multiple subscribers and message selectors | | |
| 14. | A message will not be acknowledged until processing of it is complete | | |
| 15. | Reads a textfile, creates a BytesMessage from it, then reads the message | | |
| 16. | A durable subscription is active even when the subscriber is not active | | |
| 17. | Creates and then reads a StreamMessage and a BytesMessage | | |
| 18. | Creates and reads messages in all supported JMS message formats: BytesMessage, TextMessage, MapMessage, StreamMessage, and ObjectMessage | | |
| 19. | The use of message header fields | | |
| 20. | Demonstrates that mutable objects are copied, not passed by reference, when you use them to create message objects | | |
| 21. | A simple implementation of a request/reply message exchange | | |
| 22. | Sends several messages to a queue | | |
| 23. | The simplest form of the publish/subscribe model: the producer publishes a message, and the consumer reads it using a synchronous receive | | |
| 24. | Demonstrates the use of transactions in a JMS application | | |
| 25. | Creates a Producer and a Consumer objects (Producer and Consumer classes are defined in this file) | | |
| 26. | Fetches one or more messages from a queue using asynchronous message delivery | | |
| 27. | The use of a message listener in the publish/subscribe model. The producer publishes several messages, and the consumer reads them asynchronously | | |