前言

Work Queues (工作队列)

1、引入依赖

<!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>5.20.0</version>
</dependency>

2、编写生产者代码

for (int i = 0; i < 10; i++) {
    String mag = "hello work queue......" + i;
    channel.basicPublish("", Constants.WORK_QUEUE, null, mag.getBytes());
}

Constant 包下 Constants 类

package rabbitmq.constant;

public class Constants {
    public static final String HOST = "123.57.16.61";
    public static final Integer PORT = 5672;
    public static final String USERNAME = "study";
    public static final String PASSWORD = "study";
    public static final String VIRTUAL_HOST = "bite";
    //声明一个工作队列
    public static final String WORK_QUEUE = "work.queue";
}

完整代码：

package rabbitmq.work;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import rabbitmq.constant.Constants;

import java.io.IOException;
import java.util.concurrent.TimeoutException;


/**
 * 工作队列模式
 */
public class Prooducer {
    public static void main(String[] args) throws IOException, TimeoutException {
        //创建一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Constants.HOST);
        connectionFactory.setPort(Constants.PORT);
        connectionFactory.setUsername(Constants.USERNAME);
        connectionFactory.setPassword(Constants.PASSWORD);
        connectionFactory.setVirtualHost(Constants.VIRTUAL_HOST);
        //创建一个新的连接
        Connection connection = connectionFactory.newConnection();
        //开启一个通信
        Channel channel = connection.createChannel();
        //声明交换机，使用内置的交换机
        //声明一个队列
        channel.queueDeclare(Constants.WORK_QUEUE, true, false, false, null);
        //发送消息
        for (int i = 0; i < 10; i++) {
            String mag = "hello work queue......" + i;
            channel.basicPublish("", Constants.WORK_QUEUE, null, mag.getBytes());
        }
        System.out.println("消息发送成功~");
        //资源释放
        channel.close();
        connection.close();
    }
}

3、编写消费者代码

package rabbitmq.work;

import com.rabbitmq.client.*;
import rabbitmq.constant.Constants;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class Consumer1 {
    public static void main(String[] args) throws IOException, TimeoutException {
        //创建一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Constants.HOST);
        connectionFactory.setPort(Constants.PORT);
        connectionFactory.setUsername(Constants.USERNAME);
        connectionFactory.setPassword(Constants.PASSWORD);
        connectionFactory.setVirtualHost(Constants.VIRTUAL_HOST);
        //创建一个新的连接
        Connection connection = connectionFactory.newConnection();
        //开启一个通信
        Channel channel = connection.createChannel();
        //声明一个队列，如果队列不存在，则创建，如果队列存在，则不创建
        channel.queueDeclare(Constants.WORK_QUEUE, true, false, false, null);
        //消费消息
        //消费的逻辑
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接受到消息：" + new String(body));
            }
        };
        channel.basicConsume(Constants.WORK_QUEUE, true, consumer);
//        channel.close();
//        connection.close();

    }
}

消费者2：

package rabbitmq.work;

import com.rabbitmq.client.*;
import rabbitmq.constant.Constants;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class Consumer2 {
    public static void main(String[] args) throws IOException, TimeoutException {
        //创建一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Constants.HOST);
        connectionFactory.setPort(Constants.PORT);
        connectionFactory.setUsername(Constants.USERNAME);
        connectionFactory.setPassword(Constants.PASSWORD);
        connectionFactory.setVirtualHost(Constants.VIRTUAL_HOST);
        //创建一个新的连接
        Connection connection = connectionFactory.newConnection();
        //开启一个通信
        Channel channel = connection.createChannel();
        //声明一个队列，如果队列不存在，则创建，如果队列存在，则不创建
        channel.queueDeclare(Constants.WORK_QUEUE, true, false, false, null);
        //消费消息
        //消费的逻辑
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接受到消息：" + new String(body));
            }
        };
        channel.basicConsume(Constants.WORK_QUEUE, true, consumer);
//        channel.close();
//        connection.close();
    }
}

4、运行程序, 观察结果

启动生产者：









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