RabbitMQ 几种工作模式---(三) Publish/Subscribe

 

 

 ps:X表示交换器,在RabbitMQ中,交换器主要有四种类型:direct、fanout、topic、headers

  1、direct 如果路由键完全匹配的话,消息才会被投放到相应的队列。  

  2、fanout 当发送一条消息到fanout交换器上时,它会把消息投放到所有附加在此交换器上的队列。

  3、topic 设置模糊的绑定方式,“*”操作符将“.”视为分隔符,匹配单个字符;“#”操作符没有分块的概念,它将任意“.”均视为关键字的匹配部分,能够匹配多个字符。

  ​4、header headers 交换器允许匹配 AMQP 消息的 header 而非路由键,除此之外,header 交换器和 direct 交换器完全一致,但是性能却差很多,因此基本上不会用到该交换器

 

生产者发送消息类:

package com..pubsub;


import com..utils.RabbitConstant;
import com..utils.RabbitUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;

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

public class WeatherBureau {
    public static void main(String[] args) throws IOException, TimeoutException {
        Connection connection = RabbitUtils.getConnection();
        //input为  接收控制台输入的数据
        String input = new Scanner(System.in).next();

        Channel channel = connection.createChannel();
        channel.basicPublish(RabbitConstant.EXCHANGE_WEATHER,"" , null , input.getBytes());

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

后台打印信息:

 

 

消费者1(百度):

package com..pubsub;


import com..utils.RabbitConstant;
import com..utils.RabbitUtils;
import com.rabbitmq.client.*;

import java.io.IOException;

public class Baidu {
    public static void main(String[] args) throws IOException {
        Connection connection = RabbitUtils.getConnection();
        final Channel channel = connection.createChannel();
        channel.queueDeclare(RabbitConstant.QUEUE_BAIDU, false, false, false, null);
        //queueBind用于将队列与交换机绑定
        //参数1:队列名 参数2:交互机名  参数三:路由key(暂时用不到)
        channel.queueBind(RabbitConstant.QUEUE_BAIDU, RabbitConstant.EXCHANGE_WEATHER, "");
        channel.basicQos(1);
        channel.basicConsume(RabbitConstant.QUEUE_BAIDU , false , new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("百度收到信息:" + new String(body));
                channel.basicAck(envelope.getDeliveryTag() , false);
            }
        });
    }
}

 

后台打印信息:

 

 

 

消费者2(新浪)

package com.wondersgroup.pubsub;


import com.wondersgroup.utils.RabbitConstant;
import com.wondersgroup.utils.RabbitUtils;
import com.rabbitmq.client.*;

import java.io.IOException;

public class Sina {
    public static void main(String[] args) throws IOException {
        Connection connection = RabbitUtils.getConnection();
        final Channel channel = connection.createChannel();
        channel.queueDeclare(RabbitConstant.QUEUE_SINA, false, false, false, null);
        //queueBind用于将队列与交换机绑定
        //参数1:队列名 参数2:交互机名  参数三:路由key(暂时用不到)
        channel.queueBind(RabbitConstant.QUEUE_SINA, RabbitConstant.EXCHANGE_WEATHER, "");
        channel.basicQos(1);
        channel.basicConsume(RabbitConstant.QUEUE_SINA , false , new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("新浪收到信息:" + new String(body));
                channel.basicAck(envelope.getDeliveryTag() , false);
            }
        });
    }
}

 

后台打印信息:

 

posted @ 2021-01-20 17:27  Li&Fan  阅读(137)  评论(0编辑  收藏  举报