java的RabbitMQ 实例

接收端：
package com.rabbitmq.demo;


import java.util.concurrent.TimeoutException;


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


public class Worker {


    private static final String TASK_QUEUE_NAME = "task_queue";


    public static void main(String[] argv) throws java.io.IOException, java.lang.InterruptedException, TimeoutException {


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


        // 指定队列持久化
        channel.queueDeclare(TASK_QUEUE_NAME, true, false, false, null);
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");


        // 指定该消费者同时只接收一条消息
        channel.basicQos(1);


        QueueingConsumer consumer = new QueueingConsumer(channel);


        // 打开消息应答机制
        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");


            // 返回接收到消息的确认信息
            channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
        }
    }


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


发送端：


package com.rabbitmq.demo;


import java.util.concurrent.TimeoutException;


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


public class NewTask {


    private static final String TASK_QUEUE_NAME = "task_queue";


    public static void main(String[] argv) throws java.io.IOException, TimeoutException {


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


        // 指定队列持久化
        channel.queueDeclare(TASK_QUEUE_NAME, true, false, false, null);


        String message = getMessage(argv);


        // 指定消息持久化
        channel.basicPublish("", TASK_QUEUE_NAME, MessageProperties.PERSISTENT_TEXT_PLAIN, message.getBytes());
        System.out.println(" [x] Sent '" + message + "'");


        channel.close();
        connection.close();
    }




    private static String getMessage(String[] strings) {
        if (strings.length < 1)
            return "Hello World!";
        return joinStrings(strings, " ");
    }


    private static String joinStrings(String[] strings, String delimiter) {
        int length = strings.length;
        if (length == 0)
            return "";
        StringBuilder words = new StringBuilder(strings[0]);
        for (int i = 1; i < length; i++) {
            words.append(delimiter).append(strings[i]);
        }
        return words.toString();
    }
}