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SampleQueueSender.java class is used to create the sample client which sends messages to the queue named testQueue in WSO2 MB. The code of this class is as follows.

Code Block

language	java

/*
*  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.
*/
package org.sample.jms;
import javax.jms.JMSException;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueSession;
import javax.jms.TextMessage;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Properties;
public class SampleQueueSender {
    public static final String QPID_ICF = "org.wso2.andes.jndi.PropertiesFileInitialContextFactory";
    private static final String CF_NAME_PREFIX = "connectionfactory.";
    private static final String QUEUE_NAME_PREFIX = "queue.";
    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";
    private QueueConnection queueConnection;
    private QueueSession queueSession;
    public void sendMessages() 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_NAME_PREFIX + queueName, queueName);
        InitialContext ctx = new InitialContext(properties);
        // Lookup connection factory
        QueueConnectionFactory connFactory = (QueueConnectionFactory) ctx.lookup(CF_NAME);
        queueConnection = connFactory.createQueueConnection();
        queueConnection.start();
        queueSession = queueConnection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
        // Send message
        Queue queue = (Queue)ctx.lookup(queueName);
        // create the message to send
        TextMessage textMessage = queueSession.createTextMessage("Test Message Content");
        javax.jms.QueueSender queueSender = queueSession.createSender(queue);
        queueSender.send(textMessage);
        queueSender.close();
        queueSession.close();
        queueConnection.close();
    }
    private 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();
    }
 
}

SampleQueueReceiver.java class is used to create the sample client which receives the message sent to the testQueue queue and prints it in the console. The code of this class is as follows.

Code Block

language	java

/*
*  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.
*/
package org.sample.jms;
import javax.jms.JMSException;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueSession;
import javax.jms.TextMessage;
import javax.jms.MessageConsumer;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Properties;
public class SampleQueueSenderSampleQueueReceiver {
    public static final String QPID_ICF = "org.wso2.andes.jndi.PropertiesFileInitialContextFactory";
    private static final String CF_NAME_PREFIX = "connectionfactory.";
    private static final String QUEUE_NAME_PREFIX = "queue.";
    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";
    private QueueConnection queueConnection;
    private QueueSession queueSession;
    public voidMessageConsumer sendMessagesregisterSubscriber() 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_NAME_PREFIX "queue."+ queueName, queueName);
        InitialContext ctx = new InitialContext(properties);
        // Lookup connection factory
        QueueConnectionFactory connFactory = (QueueConnectionFactory) ctx.lookup(CF_NAME);
        queueConnection = connFactory.createQueueConnection();
        queueConnection.start();
        queueSession = queueConnection.createQueueSession(false, QueueSession.
                queueConnection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
        // SendReceive message
        Queue queue =  (Queue) ctx.lookup(queueName);
        //MessageConsumer createconsumer the message to send= queueSession.createConsumer(queue);
        return consumer;
TextMessage textMessage = queueSession.createTextMessage("Test Message Content"); }
    public void receiveMessages(MessageConsumer consumer)  javax.jms.QueueSender queueSender = queueSession.createSender(queuethrows NamingException, JMSException {
        TextMessage message = (TextMessage) consumer.receive();
        System.out.println("Got message from queue receiver==>" + message.getText());
        queueSender.send(textMessage// Housekeeping
        consumer.close();
        queueSenderqueueSession.close();
        queueSessionqueueConnection.closestop();
        queueConnection.close();
    }
    private 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 Main.java class defines the main method for calling both the clients mentioned above. The code of this class is as follows.

Code Block

language	java

 /*
*  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.
*/

package org.sample.jms;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.naming.NamingException;

public class Main {
	public static void main(String[] args) throws NamingException, JMSException {
        SampleQueueReceiver queueReceiver = new SampleQueueReceiver();
        MessageConsumer consumer = queueReceiver.registerSubscriber();
        SampleQueueSender queueSender = new SampleQueueSender();
        queueSender.sendMessages();
        queueReceiver.receiveMessages(consumer);
    }
}

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