Fetches one or more messages from a queue using asynchronous message delivery
/*
* @(#)AsynchQueueExample.java 1.3 02/05/02
*
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*
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* which is disparaging to Sun.
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import javax.jms.*;
/**
* The AsynchQueueExample class consists only of a main method, which fetches
* one or more messages from a queue using asynchronous message delivery.
* <p>
* Compile TextListener.java before you run this program.
* <p>
* Run this program in conjunction with SenderToQueue. Specify a queue name
* on the command line when you run the program.
*
* @author Kim Haase
* @version 1.6, 08/14/00
*/
public class AsynchQueueExample {
/**
* 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;
TextListener textListener = null;
int exitResult = 0;
if (args.length != 1) {
System.out.println("Usage: java AsynchQueueExample <queue_name>");
System.exit(1);
}
queueName = new String(args[0]);
System.out.println("Queue name is " + queueName);
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.
* Register message listener (TextListener).
* Start message delivery; listener displays the message obtained.
* Block until producer issues a control message indicating
* end of publish stream.
*/
try {
msgConsumer = session.createConsumer(queue);
textListener = new TextListener();
msgConsumer.setMessageListener(textListener);
connection.start();
textListener.monitor.waitTillDone();
} 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);
}
}
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