JMS: Problem with Consumer Program

[Nitin D Gaur]

Hi Forum,

I am using one Producer-Consumer program on Apache ActiveMQ to send and recieve messages from remote JMS-Broker server. I am able to successfully produce the message but not able to consume the response from JMS-Broker Server. Below is my program.

 
    
import java.util.Arrays;  
  
  
import javax.jms.Connection;  
import javax.jms.DeliveryMode;  
import javax.jms.Destination;  
import javax.jms.Message;  
import javax.jms.MessageConsumer;  
import javax.jms.MessageProducer;  
import javax.jms.Session;  
import javax.jms.TextMessage;  
  
import org.apache.activemq.ActiveMQConnection;  
import org.apache.activemq.ActiveMQConnectionFactory;  
import org.apache.activemq.util.IndentPrinter;  
  
/** 
 * A simple tool for publishing messages 
 *  
 * @version $Revision: 1.2 $ 
 */  
public class RequesterTool {  
  
    private int messageCount = 10;  
    private long sleepTime;  
    private boolean verbose = true;  
    private int messageSize = 255;  
    private long timeToLive;  
    private String subject = "TOOL.DEFAULT";  
    private String replySubject;  
    private boolean topic;  
    private String user = ActiveMQConnection.DEFAULT_USER;  
    private String password = ActiveMQConnection.DEFAULT_PASSWORD;  
    private String url = ActiveMQConnection.DEFAULT_BROKER_URL;  
    private boolean transacted;  
    private boolean persistent;  
    private String clientId;  
    private long receiveTimeOut;  
  
    private Destination destination;  
    private Destination replyDest;  
    private MessageProducer producer;  
    private MessageConsumer consumer;  
    private Session session;  
  
    public static void main(String[] args) {  
        RequesterTool requesterTool = new RequesterTool();  
        args = new String[13];  
        args[0] = "--url=https://172.29.2.92:9443";  
        //args[0] = "--url=tcp://localhost:61616";  
        args[1] = "--topic=false";  
       args[2] = "--subject=MyQueueOut";  
  
        args[3] = "--persistent=false";  
        args[4] = "--message-count=1";  
        args[5] = "--message-size=3000";  
        args[6] = "--time-to-live=0";  
        args[7] = "--sleep-time=0";  
        args[8] = "--transacted=false";  
        args[9] = "--verbose=true";  
        args[10] = "--client-id=GL-SIM-CLIENT";  
        args[11] = "--reply-subject=SELECTOR_REPLIES";  
        args[12] = "--receive-time-out=2";  
  
  
  
  
        String[] unknown = CommandLineSupport.setOptions(requesterTool, args); // to set the options provided in args[]  
        if (unknown.length > 0) {  
            System.out.println("Unknown options: " + Arrays.toString(unknown));  
            System.exit(-1);  
        }  
        requesterTool.run();  
    }  
  
    public void run() {  
  
        Connection connection = null;  
        try {  
            System.setProperty("javax.net.ssl.keyStore","E:/certs/client.ks");  
            System.setProperty("javax.net.ssl.keyStorePassword","something");  
            System.setProperty("javax.net.ssl.trustStore","E:/certs/client.ts");  
            System.setProperty("javax.net.ssl.trustStorePassword","something");  
  
            System.out.println("Connecting to URL: " + url);  
            System.out.println("Publishing a Message with size " + messageSize + " to " + (topic ? "topic" : "queue") + ": " + subject);  
            System.out.println("Using " + (persistent ? "persistent" : "non-persistent") + " messages");  
            System.out.println("Sleeping between publish " + sleepTime + " ms");  
  
            // Create the connection  
            ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("gluser", "gluser", url);  
            connection = connectionFactory.createConnection();  
            if (persistent && clientId != null && clientId.length() > 0 && !"null".equals(clientId)) {  
                connection.setClientID(clientId);  
            }  
            connection.start();  
  
            // Create the Session  
            session = connection.createSession(transacted, Session.AUTO_ACKNOWLEDGE);  
  
            // And the Destinations..  
            if (topic) {  
                destination = session.createTopic(subject);  
                if (replySubject == null || replySubject.equals("")) {  
                    replyDest = session.createTemporaryTopic();  
                } else {  
                    replyDest = session.createTopic(replySubject);  
                }  
            } else {  
                destination = session.createQueue(subject);  
                if (replySubject == null || replySubject.equals("")) {  
                    replyDest = session.createTemporaryQueue();  
                } else {  
                    replyDest = session.createQueue(replySubject);  
                }  
            }  
            System.out.println("Destination: " + destination);  
            System.out.println("Reply Destination: " + replyDest);  
  
            // Create the producer  
            producer = session.createProducer(destination);  
            if (persistent) {  
                producer.setDeliveryMode(DeliveryMode.PERSISTENT);  
            } else {  
                producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);  
            }  
            if (timeToLive != 0) {  
                System.out.println("Messages time to live " + timeToLive + " ms");  
                producer.setTimeToLive(timeToLive);  
            }  
  
            // Create the reply consumer  
            consumer = session.createConsumer(replyDest);  
  
            // Start sending reqests.  
            requestLoop();  
  
            System.out.println("Done.");  
  
            // Use the ActiveMQConnection interface to dump the connection  
            // stats.  
            ActiveMQConnection c = (ActiveMQConnection)connection;  
            c.getConnectionStats().dump(new IndentPrinter());  
  
        } catch (Exception e) {  
            System.out.println("Caught: " + e);  
            e.printStackTrace();  
        } finally {  
            try {  
                connection.close();  
            } catch (Throwable ignore) {  
            }  
        }  
    }  
  
    protected void requestLoop() throws Exception {  
  
        for (int i = 0; i < messageCount || messageCount == 0; i++) {  
  
            TextMessage message = session.createTextMessage(createMessageText(i));  
            message.setJMSReplyTo(replyDest);  
            message.setJMSCorrelationID("8");  
  
            if (verbose) {  
                String msg = message.getText();  
               /* if (msg.length() > 50) { 
                    msg = msg.substring(0, 50) + "..."; 
                }*/  
                System.out.println("Sending message: " + msg);  
            }  
  
            producer.send(message);  
            if (transacted) {  
                session.commit();  
            }  
  
            System.out.println("Waiting for reponse message...");  
            Message message2 = consumer.receive();  
              
            //Message message2 = consumer.receiveNoWait();  
            System.out.println("after");  
            if (message2 instanceof TextMessage) {  
                System.out.println("Reponse message: " + ((TextMessage)message2).getText());  
            } else {  
                System.out.println("Reponse message: " + message2);  
            }  
            if (transacted) {  
                session.commit();  
            }  
  
            Thread.sleep(sleepTime);  
  
        }  
    }  
  
    /** 
     * @param i 
     * @return 
     */  
    private String createMessageText(int index) {  
        StringBuffer buffer = new StringBuffer(messageSize);  
        //buffer.append("Message: " + index + " sent at: " + new Date());  
        buffer.append("Request Message");  
        if (buffer.length() > messageSize) {  
            return buffer.substring(0, messageSize);  
        }  
        for (int i = buffer.length(); i < messageSize; i++) {  
            buffer.append(' ');  
        }  
        return buffer.toString();  
    }  
  
    public void setClientId(String clientId) {  
        this.clientId = clientId;  
    }  
  
    public void setPersistent(boolean durable) {  
        this.persistent = durable;  
    }  
  
    public void setMessageCount(int messageCount) {  
        this.messageCount = messageCount;  
    }  
  
    public void setMessageSize(int messageSize) {  
        this.messageSize = messageSize;  
    }  
  
    public void setPassword(String password) {  
        this.password = password;  
    }  
  
    public void setSleepTime(long sleepTime) {  
        this.sleepTime = sleepTime;  
    }  
  
    public void setSubject(String subject) {  
        this.subject = subject;  
    }  
  
    public void setTimeToLive(long timeToLive) {  
        this.timeToLive = timeToLive;  
    }  
  
    public void setTopic(boolean topic) {  
        this.topic = topic;  
    }  
  
    public void setQueue(boolean queue) {  
        this.topic = !queue;  
    }  
  
    public void setTransacted(boolean transacted) {  
        this.transacted = transacted;  
    }  
  
    public void setUrl(String url) {  
        this.url = url;  
    }  
  
    public void setUser(String user) {  
        this.user = user;  
    }  
  
    public void setVerbose(boolean verbose) {  
        this.verbose = verbose;  
    }  
  
    public void setReplySubject(String replySubject) {  
        this.replySubject = replySubject;  
    }  
  
    public long getReceiveTimeOut() {  
        return receiveTimeOut;  
    }  
  
    public void setReceiveTimeOut(long receiveTimeOut) {  
        this.receiveTimeOut = receiveTimeOut;  
    }  
  
          
}  
    

I tested this code locally by using a local consumer-producer program this program works fine but for remote JMS-Broker Server it doesn't.

Please somebody help.

Thanks,
Nitin

[Michael Rootman]

Hi,

Do you get any error?
Did you check that port is opened on remote server?

Regards,

[Nitin D Gaur]

Yeah Ports are opened,

No error either.

Messages are enqueued in the queue, I could see it in ActiveMQ wed admin.

but I am not able to consume it.

Could this be the prefetch size problem ?
because there are multiple consumers for the queue. Currently prefetch size is 1000.
what should be the value for multiple consumers ?

ciao

Nitin