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Execute the code and view the created queue and its increased message count using Message Broker management console.

 

 

 

Info

In addition to using javax.jms.QueueSender class to send the messages you can also use a javax.jms.MessageProducer client and send the messages to a destination queue. Following is the way of creating a JMS MessageProducer.

javax.jms.MessageProducer messageProducer = queueSession.createProducer(queue);

messageProducer.send(textMessage);

messageProducer.close();

 

 

 

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Next, execute the following "QueueReceiver" JMS client, using which messages can be received to 'testQueue'.

Code Block
languagejava
/*
*  Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
*  WSO2 Inc. licenses this file to you under the Apache License,
*  Version 2.0 (the "License"); you may not use this file except
*  in compliance with the License.
*  You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Properties;
public class QueueReceiver {
    public static final String QPID_ICF = "org.wso2.andes.jndi.PropertiesFileInitialContextFactory";
    private static final String CF_NAME_PREFIX = "connectionfactory.";
    private static final String CF_NAME = "qpidConnectionfactory";
    String userName = "admin";
    String password = "admin";
    private static String CARBON_CLIENT_ID = "carbon";
    private static String CARBON_VIRTUAL_HOST_NAME = "carbon";
    private static String CARBON_DEFAULT_HOSTNAME = "localhost";
    private static String CARBON_DEFAULT_PORT = "5672";
    String queueName = "testQueue";

    public static void main(String[] args) throws NamingException, JMSException {
        QueueReceiver queueReceiver = new QueueReceiver();
        queueReceiver.receiveMessages();
    }
    public void receiveMessages() throws NamingException, JMSException {
        Properties properties = new Properties();
        properties.put(Context.INITIAL_CONTEXT_FACTORY, QPID_ICF);
        properties.put(CF_NAME_PREFIX + CF_NAME, getTCPConnectionURL(userName, password));
        properties.put("queue."+ queueName,queueName);
        System.out.println("getTCPConnectionURL(userName,password) = " + getTCPConnectionURL(userName, password));
        InitialContext ctx = new InitialContext(properties);
        // Lookup connection factory
        QueueConnectionFactory connFactory = (QueueConnectionFactory) ctx.lookup(CF_NAME);
        QueueConnection queueConnection = connFactory.createQueueConnection();
        queueConnection.start();
        QueueSession queueSession =
                queueConnection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
        //Receive message
        Queue queue =  (Queue) ctx.lookup(queueName);
        MessageConsumer queueReceiver = queueSession.createConsumer(queue);
        TextMessage message = (TextMessage) queueReceiver.receive();
        System.out.println("Got message ==>" + message.getText());
        queueReceiver.close();
        queueSession.close();
        queueConnection.stop();
        queueConnection.close();
    }
    public String getTCPConnectionURL(String username, String password) {
        // amqp://{username}:{password}@carbon/carbon?brokerlist='tcp://{hostname}:{port}'
        return new StringBuffer()
                .append("amqp://").append(username).append(":").append(password)
                .append("@").append(CARBON_CLIENT_ID)
                .append("/").append(CARBON_VIRTUAL_HOST_NAME)
                .append("?brokerlist='tcp://").append(CARBON_DEFAULT_HOSTNAME).append(":").append(CARBON_DEFAULT_PORT).append("'")
                .toString();
    }

}

The received messages get printed on the console. Note the message count getting decreased for 'testQueue' using the Management Console.