Post a message to a remote JMS queue using JBoss

Question

This looks simple but I can't find a simple answer.

I want to open a connection to a remote JMS broker (IP and port are known), open a session to the a specific queue (name known) and post a message to this queue.

Is there any simple Java API (standard if possible) to do that ?

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EDIT

Ok I understand now that JMS is a driver spec just like JDBC and not a communication protocol as I thought.

Given I am running in JBoss, I still don't understand how to create a JBossConnectionFactory .

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EDIT

I actually gave the problem some thoughts (hmmm) and if JMS needs to be treated the same as JDBC, then I need to use a client provided by my MQ implementation. Since we are using SonicMQ for our broker, I decided to embed the sonic_Client.jar library provided with SonicMQ.

This is working in a standalone Java application and in our JBoss service.

Thanks for the help

Answer 1

You'll need to use JMS, create a QueueConnectionFactory and go from there. Exactly how you create the QueueConnectionFactory will be vendor specific (JMS is basically a driver spec for message queues just as JDBC is for databases) but on IBM MQ it something like this:

MQQueueConnectionFactory connectionFactory = new MQQueueConnectionFactory();
connectionFactory.setHostName(<hostname>);
connectionFactory.setPort(<port>);
connectionFactory.setTransportType(JMSC.MQJMS_TP_CLIENT_MQ_TCPIP);
connectionFactory.setQueueManager(<queue manager>);
connectionFactory.setChannel("SYSTEM.DEF.SVRCONN");

QueueConnection queueConnection = connectionFactory.createQueueConnection();
QueueSession queueSession = connection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);

Queue queue = queueSession.createQueue(<queue name>);

QueueSender queueSender = session.createSender(queue);
QueueReceiver queueReceiver = session.createReceiver(queue); 

EDIT (following question edit)

The best way to access a remote queue, or any queue for that matter, is to add a Queue instance to the JNDI registry. For remote queues this is achieved using MBeans that add the Queue instance when the server starts.

Take a look at http://www.jboss.org/community/wiki/UsingWebSphereMQSeriesWithJBossASPart4 , which while it's an example with IBM MQ, is essentially what you have to do to connect to any remote queue.

If you look at jbossmq-destinations-service.xml and org.jboss.mq.server.jmx you'll see the MBeans you need to create in relation to a JBoss queue.

Answer 2

Here is the code we used to connect to the SonicMQ broker using the sonic_Client.jar library:

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;


public class JmsClient
{
    public static void main(String[] args) throws JMSException
    {
        ConnectionFactory factory = new progress.message.jclient.ConnectionFactory("tcp://<host>:<port>", "<user>", "<password>");
        Connection connection = factory.createConnection();

        try
        {
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            try
            {
                MessageProducer producer = session.createProducer(session.createQueue("<queue>"));
                try
                {
                    producer.send(session.createTextMessage("<message body>"));
                }
                finally
                {
                    producer.close();
                }
            }
            finally
            {
                session.close();
            }
        }
        finally
        {
            connection.close();
        }
    }
}

Answer 3

Actually I'm using JBoss 4 and JNDI is not difficult to use.

First of all you have to know where your JNDI is running.

In my JBoss (conf\\jboss-service.xml) I have:

<mbean code="org.jboss.naming.NamingService" name="jboss:service=Naming" xmbean-dd="resource:xmdesc/NamingService-xmbean.xml">
    ...
    <attribute name="Port">7099</attribute>
    ...
</mbean>

This is important, this is port you want to connect to.

Now you can easily connect to JNDI using this code:

Hashtable<String, String> contextProperties = new Hashtable<String, String>();
contextProperties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
contextProperties.put(Context.PROVIDER_URL, "jnp://localhost:7099");

InitialContext initContext = new InitialContext(contextProperties);

Now when you have context, it's very similar to @Nick Holt's answer, except connection factory creation, you have to use:

QueueConnectionFactory connFactory = (QueueConnectionFactory) initContext.lookup("ConnectionFactory");

Also you do not need to create queue if there is deployed some

Queue queue = (Queue) initContext.lookup("queueName");

All the code above was tested with JBoss 4.2.2 GA and JBossMQ (JBossMQ was, if I'm correct, replaced in 4.2.3 with JBoss messaging).