RabbitMQ

介绍

java代码操作

package com.wiselee;

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

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

/**
 * @PROJECT_NAME: rabbitmq
 * @DESCRIPTION:
 * @USER: 28416
 * @DATE: 2022/12/25 14:54
 */
public class Producer {
    //队列名称
    public static final  String QUEE_NAME = "hello";

    public static void main(String[] args) throws IOException, TimeoutException {
        //创建一个连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("140.246.105.174");
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        //创建连接
        Connection connection = connectionFactory.newConnection();
        //获取信道
        Channel channel = connection.createChannel();
        /**
         * 生成一个队列
         * 1.队列名称
         * 2.队列里面的消息是否持久化（磁盘里）默认情况下不是持久化
         * 3.该队列是否供一个消费之消费，是否进行消息的共享
         * 4.是否自动删除
         * 5.其他参数
         */
        channel.queueDeclare(QUEE_NAME,false,false,false,null);
        String message = "hello world";
        /**
         * 发送一个消息
         * 1.发送到那个交换机
         * 2.路由的key值是哪个，本次队列的名称
         * 3.其他参数信息
         * 4.发送的消息
         */
        channel.basicPublish("",QUEE_NAME,null,message.getBytes());
        System.out.println("消息发送完毕");
    }
}

浏览器端接收到次条数据

消费者代码

package com.wiselee;

import com.rabbitmq.client.*;

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

/**
 * @PROJECT_NAME: rabbitmq
 * @DESCRIPTION:
 * @USER: 28416
 * @DATE: 2022/12/27 12:53
 */
public class Consumer {
    public static final String QUEUE_NAME = "hello";

    public static void main(String[] args) throws IOException, TimeoutException {
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("140.246.105.174");
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        Connection connection = connectionFactory.newConnection();
        Channel channel = connection.createChannel();
        //声明接收消息
        DeliverCallback deliverCallback = (consumerTag,message) ->{
            System.out.println(message);
        };
        //取消消息时的回调
        CancelCallback cancelCallback = consumerTag ->{
            System.out.println("消费消息被中断");
        };

        /**
         * 消费者接收消息
         * 1.消费那个队列
         * 2.消费成功之后，是否要自动应答 true 代表自动应答  false 代表手动应答
         * 3.消费者未成功消费的回调
         * 4.消费者取消消费的回调
         */
        channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);


    }
}

网页端信息

工作队列原理

轮训分发消息

需要采用多线程的方法

1.抽取工具类

package com.wiselee.utils;


import com.rabbitmq.client.*;

import java.io.IOException;

import java.util.concurrent.TimeoutException;

/**
 * @PROJECT_NAME: rabbitmq
 * @DESCRIPTION:
 * @USER: 28416
 * @DATE: 2023/1/6 15:08
 */
public class RabbitMqUtils {
    /**
     *得到一个连接的channel
     * @return
     * @throws IOException
     * @throws TimeoutException
     */
    public static Channel getChannel() throws IOException, TimeoutException {
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("140.246.105.174");
        connectionFactory.setUsername("guest");
        connectionFactory.setPassword("guest");
        Connection connection = connectionFactory.newConnection();
        com.rabbitmq.client.Channel channel = connection.createChannel();
        return  channel;
    }
}

2.准备消费者和生产者线程

2.1 消费者代码

package com.wiselee.two;

import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import com.wiselee.utils.RabbitMqUtils;

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

/**
 * @PROJECT_NAME: rabbitmq
 * @DESCRIPTION:
 * @USER: 28416
 * @DATE: 2023/1/6 15:12
 *
 * 这是一个工作线程 （相当于之前的消费者）
 */
public class Work01 {
    //队列名称
    public static  final   String QUEUE_NAME = "hello";

    public static void main(String[] args) throws IOException, TimeoutException {
        Channel channel = RabbitMqUtils.getChannel();
        //消息的接收
        DeliverCallback deliverCallback = (consumerTag,message)->{
            System.out.println(new String(message.getBody()));
        };
        CancelCallback cancelCallback =(consumerTag) ->{
            System.out.println(consumerTag +"消息者取消消费接口回调逻辑");
        };
        /**
         * 消费者接收消息
         * 1.消费那个队列
         * 2.消费成功之后，是否要自动应答 true 代表自动应答  false 代表手动应答
         * 3.消费者未成功消费的回调
         * 4.消费者取消消费的回调
         */
        System.out.println("c1_等待接收消息......");
        channel.basicConsume(QUEUE_NAME,true,deliverCallback,cancelCallback);

    }
}

2.2 生产者代码

package com.wiselee.two;

import com.rabbitmq.client.Channel;
import com.wiselee.utils.RabbitMqUtils;


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

/**
 * @PROJECT_NAME: rabbitmq
 * @DESCRIPTION:
 * @USER: 28416
 * @DATE: 2023/1/6 15:45
 */
public class Task01 {
    //队列名称
    public static  final  String QUEUE_NAME ="hello";

    public static void main(String[] args) throws IOException, TimeoutException {
        Channel channel = RabbitMqUtils.getChannel();
        channel.queueDeclare(QUEUE_NAME,false,false,false,null);
        //从控制台接收消息
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()){
            String   message = scanner.next();
            channel.basicPublish("",QUEUE_NAME,null, message.getBytes());
            System.out.println("发送消息成功");
        }


    }
}

测试

使用生产者线程生产4条消息