4.Rabbitmq Publish/Subscribe

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Nick Qiu 发表于 2021/03/25 23:15:38 2021/03/25
【摘要】 前言 发布订阅模式,如下所示: p: 生产者,生产消息; x: 交换机,接收消息; c1,c2: 消息队列 image.png 代码 build.gradle plugins { id 'java' } group 'com.nick' version '1.0-SNAPSHOT' sourceCompatibility = 1.8 repositorie...

前言

发布订阅模式,如下所示:
p: 生产者,生产消息;
x: 交换机,接收消息;
c1,c2: 消息队列

image.png

代码

  • build.gradle
plugins { id 'java'
}

group 'com.nick'
version '1.0-SNAPSHOT'

sourceCompatibility = 1.8

repositories { mavenCentral()
}

dependencies { testCompile group: 'junit', name: 'junit', version: '4.12' compile group: 'com.rabbitmq', name: 'amqp-client', version: '5.2.0' compile group: 'org.slf4j', name: 'slf4j-api', version: '1.7.25' compile group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.25' compile group: 'org.projectlombok', name: 'lombok', version: '1.18.0'
}
  • EmitLog.java
package com.nick.publishSubscribe;

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

import java.util.concurrent.TimeoutException;

public class EmitLog { private static final String EXCHANGE_NAME = "logs"; public static void main(String[] argv) throws java.io.IOException, TimeoutException { ConnectionFactory factory = new ConnectionFactory(); factory.setHost("192.168.5.136"); Connection connection = factory.newConnection(); Channel channel = connection.createChannel(); channel.exchangeDeclare(EXCHANGE_NAME, "fanout"); //String message = getMessage(argv); String message = "hello publish and subscribe."; channel.basicPublish(EXCHANGE_NAME, "key_nick", null, message.getBytes()); System.out.println(" [x] Sent '" + message + "'"); channel.close(); connection.close(); System.exit(0); }
}
  • ReceiveLogs.java
package com.nick.publishSubscribe;

import com.rabbitmq.client.*;

import java.io.IOException;

public class ReceiveLogs { private static final String EXCHANGE_NAME = "logs"; public static void main(String[] argv) throws Exception { ConnectionFactory factory = new ConnectionFactory(); factory.setHost("192.168.5.136"); Connection connection = factory.newConnection(); Channel channel = connection.createChannel(); channel.exchangeDeclare(EXCHANGE_NAME, "fanout"); String queueName = channel.queueDeclare().getQueue(); channel.queueBind(queueName, EXCHANGE_NAME, "key_nick"); System.out.println(" [*] Waiting for messages. To exit press CTRL+C"); Consumer consumer = new DefaultConsumer(channel) { @Override public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException { String message = new String(body, "UTF-8"); System.out.println(" [x] Received '" + message + "'"); } }; channel.basicConsume(queueName, true, consumer); }
}

执行效果

  • 执行ReceiveLogs,再执行EmitLog查看日志打印,可以看到接收到了数据
image.png

详细代码

详细代码可以在github上下载:https://github.com/qiujiahong/rabbitmq_study

文章来源: www.jianshu.com,作者:Nick_4438,版权归原作者所有,如需转载,请联系作者。

原文链接:www.jianshu.com/p/ebccfdca9347

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