JMS clients

Main.java

package org.apache.qpid.jms.example;

import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

class Main {
    public static void main(String [] args) throws InterruptedException {
        if (args.length < 1) {
            throw new IllegalArgumentException("You must supply count");
        } else {
            int count = Integer.parseInt(args[0]);

            ExecutorService executor = Executors.newFixedThreadPool(3);
            executor.execute(() -> Receiver.receive("broker1", count));
            executor.execute(() -> Receiver.receive("broker2", count));

            System.out.println("Started subscribers");
            Thread.sleep(10000);
            System.out.println("Starting publisher");
            executor.execute(() -> Sender.send("broker1", count));

            executor.shutdown();
            executor.awaitTermination(1, TimeUnit.DAYS);
        }
    }
}

Receiver.java

/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.qpid.jms.example;

import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;

public class Receiver {
    public static void receive(String brokerId, int count) {
        try {
            // The configuration for the Qpid InitialContextFactory has been supplied in
            // a jndi.properties file in the classpath, which results in it being picked
            // up automatically by the InitialContext constructor.
            Context context = new InitialContext();

            ConnectionFactory factory = (ConnectionFactory) context.lookup(brokerId);

            Topic topic = (Topic)context.lookup("myTopicLookup");

            Connection connection = factory.createConnection();
            connection.setExceptionListener(new MyExceptionListener());
            connection.start();

            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

           // Topic topic = session.createTopic("mytopic");

            MessageConsumer messageConsumer = session.createConsumer(topic);

            int actualCount = 0;
            for (int i = 1; i <= count; i++, actualCount++) {
                Message message = messageConsumer.receive();
                System.out.println("Got message " + i + " from " + brokerId);
            }

            connection.close();
        } catch (Exception exp) {
            System.out.println("Caught exception, exiting.");
            exp.printStackTrace(System.out);
            System.exit(1);
        }
    }

    private static class MyExceptionListener implements ExceptionListener {
        @Override
        public void onException(JMSException exception) {
            System.out.println("Connection ExceptionListener fired, exiting.");
            exception.printStackTrace(System.out);
            System.exit(1);
        }
    }
}

Sender.java

/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.qpid.jms.example;

import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;

public class Sender {
    private static final int DELIVERY_MODE = DeliveryMode.NON_PERSISTENT;

    public static void send(String brokerId, int count) {
        try {
            // The configuration for the Qpid InitialContextFactory has been supplied in
            // a jndi.properties file in the classpath, which results in it being picked
            // up automatically by the InitialContext constructor.
            Context context = new InitialContext();

            ConnectionFactory factory = (ConnectionFactory) context.lookup(brokerId);

            Topic topic = (Topic)context.lookup("myTopicLookup");

            Connection connection = factory.createConnection();
            connection.setExceptionListener(new MyExceptionListener());
            connection.start();

            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            MessageProducer messageProducer = session.createProducer(topic);

            for (int i = 1; i <= count; i++) {
                TextMessage message = session.createTextMessage("Text!");
                messageProducer.send(message, DELIVERY_MODE, Message.DEFAULT_PRIORITY, Message.DEFAULT_TIME_TO_LIVE);
                System.out.println("Sent message " + i + " to " + brokerId);
            }

            connection.close();
        } catch (Exception exp) {
            System.out.println("Caught exception, exiting.");
            exp.printStackTrace(System.out);
            System.exit(1);
        }
    }

    private static class MyExceptionListener implements ExceptionListener {
        @Override
        public void onException(JMSException exception) {
            System.out.println("Connection ExceptionListener fired, exiting.");
            exception.printStackTrace(System.out);
            System.exit(1);
        }
    }
}