Jms receive timeout problem

Question

Hi guys,
I want to receive messages on a timeout basis. However, my code always stuck at a certain point. Here is my source code:
import javax.jms.*;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.spi.NamingManager;
import java.util.Hashtable;
public class JmsRecv {
    public static void main(String[] args) throws JMSException, NamingException {
        Context JndiContext = createContextForWeblogic(args[0]);
        QueueConnectionFactory TheQueueConnectionFactory = (QueueConnectionFactory) JndiContext.lookup("weblogic.jms.ConnectionFactory");
        Queue q = (Queue) JndiContext.lookup("Queue_A");
        QueueConnection qc = TheQueueConnectionFactory.createQueueConnection();
        qc.start();
        QueueSession qs = qc.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
        QueueReceiver qr = qs.createReceiver(q, null);
        Message mrecv = null;
        long elapsed = 0;
        int index = 1;
        while (mrecv == null && elapsed < 200) {
            long start = System.currentTimeMillis();
            mrecv = qr.receive(10);
            elapsed = System.currentTimeMillis() - start;
            System.out.println("index=" + index++ + " elapsed=" + elapsed);
        qr.close();
        qs.close();
        qc.close();
    static Context createContextForWeblogic(String connectionURL) {
        Context ctx = null;
        Hashtable env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
        env.put(Context.PROVIDER_URL, connectionURL);
        try {
            ctx = NamingManager.getInitialContext(env);
        } catch (Exception e) {
            e.printStackTrace();
            MSFException msfException = new MSFException(e.getMessage());
            msfException.initCause(e);
            throw msfException;
        return ctx;
}And the result is always:
index=1 elapsed=31
index=2 elapsed=16
index=3 elapsed=15
index=139 elapsed=16
index=140 elapsed=15
index=141 elapsed=9391
It always stops at index 141. Why the jms receive with timeout works initially then doesn't work as expected? Any ideas?? I have a similar problem with send too. Send works quickly initially but at a certain point sending takes too much time. Thanks.
Gurkan

Answer 1

try moving
long start = System.currentTimeMillis();
outside your while loop. That is your starting point and it should change after you start. But having it in the loop resets it.