es.devcircus.rabbitmq_examples.rabbitmq_work_queues.Worker.java Source code

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Here is the source code for es.devcircus.rabbitmq_examples.rabbitmq_work_queues.Worker.java

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/**
 * This file is part of rabbitmq-examples.
 *
 * rabbitmq-examples is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2, or (at your option) any later version.
 *
 * rabbitmq-examples is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; see the file COPYING. If not, see
 * <http://www.gnu.org/licenses/>.
 */
package es.devcircus.rabbitmq_examples.rabbitmq_work_queues;

import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.QueueingConsumer;

/**
 * @author Adrian Novegil Toledo
 * @mail adrian.novegil@gmail.com
 * @description
 */
public class Worker {

    private static final String TASK_QUEUE_NAME = "task_queue";

    /**
     * 
     * @param argv
     * @throws Exception 
     */
    public static void main(String[] argv) throws Exception {

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.queueDeclare(TASK_QUEUE_NAME, true, false, false, null);
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

        channel.basicQos(1);

        QueueingConsumer consumer = new QueueingConsumer(channel);
        channel.basicConsume(TASK_QUEUE_NAME, false, consumer);

        while (true) {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            String message = new String(delivery.getBody());

            System.out.println(" [x] Received '" + message + "'");
            doWork(message);
            System.out.println(" [x] Done");

            channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
        }
    }

    /**
     * 
     * @param task
     * @throws InterruptedException 
     */
    private static void doWork(String task) throws InterruptedException {
        for (char ch : task.toCharArray()) {
            if (ch == '.') {
                Thread.sleep(1000);
            }
        }
    }
}