RabbitMQ Pub/Sub订阅模式

实现一个生产者

package com.mq.mqproducer;

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

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

/**
 * 发送消息
 */
public class Producer_PubSub {
    public static void main(String[] args) throws IOException, TimeoutException {
        //创建连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        //主机地址;默认为 localhost
        connectionFactory.setHost("localhost");
        //连接端口;默认为 5672
        connectionFactory.setPort(5672);
        //虚拟主机名称;默认为 /
        connectionFactory.setVirtualHost("/");
        //连接用户名；默认为guest
        connectionFactory.setUsername("guest");
        //连接密码；默认为guest
        connectionFactory.setPassword("guest");

        //创建连接
        Connection connection = null;
        connection = connectionFactory.newConnection();

        // 创建频道
        Channel channel = null;

        channel = connection.createChannel();

       /*

       exchangeDeclare(String exchange, BuiltinExchangeType type, boolean durable, boolean autoDelete, boolean internal, Map<String, Object> arguments)
       参数：
        1. exchange:交换机名称
        2. type:交换机类型
            DIRECT("direct"),：定向
            FANOUT("fanout"),：扇形（广播），发送消息到每一个与之绑定队列。
            TOPIC("topic"),通配符的方式
            HEADERS("headers");参数匹配

        3. durable:是否持久化
        4. autoDelete:自动删除
        5. internal：内部使用。 一般false
        6. arguments：参数
        */

        String exchangeName = "test_fanout";
        //5. 创建交换机
        channel.exchangeDeclare(exchangeName, BuiltinExchangeType.FANOUT,true,false,false,null);
        //6. 创建队列
        String queue1Name = "test_fanout_queue1";
        String queue2Name = "test_fanout_queue2";
        channel.queueDeclare(queue1Name,true,false,false,null);
        channel.queueDeclare(queue2Name,true,false,false,null);
        //7. 绑定队列和交换机
        /*
        queueBind(String queue, String exchange, String routingKey)
        参数：
            1. queue：队列名称
            2. exchange：交换机名称
            3. routingKey：路由键，绑定规则
                如果交换机的类型为fanout ，routingKey设置为""
         */
        channel.queueBind(queue1Name,exchangeName,"");
        channel.queueBind(queue2Name,exchangeName,"");

        String body = "日志信息：张三调用了findAll方法...日志级别：info...";
        //8. 发送消息
        channel.basicPublish(exchangeName,"",null,body.getBytes());

        //9. 释放资源
//        channel.close();
//        connection.close();

    }
}

实现多个消费者（这里的例子实现两个消费者）

消费者1

package com.mq.mqconsumer;

import com.rabbitmq.client.*;

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

public class Consumer_PubSub1 {
    public static void main(String[] args) throws IOException, TimeoutException {

        //创建连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        //主机地址;默认为 localhost
        connectionFactory.setHost("localhost");
        //连接端口;默认为 5672
        connectionFactory.setPort(5672);
        //虚拟主机名称;默认为 /
        connectionFactory.setVirtualHost("/");
        //连接用户名；默认为guest
        connectionFactory.setUsername("guest");
        //连接密码；默认为guest
        connectionFactory.setPassword("guest");

        //创建连接
        Connection connection = null;
        connection = connectionFactory.newConnection();

        // 创建频道
        Channel channel = null;

        channel = connection.createChannel();


        String queue1Name = "test_fanout_queue1";
        String queue2Name = "test_fanout_queue2";


        /*
        basicConsume(String queue, boolean autoAck, Consumer callback)
        参数：
            1. queue：队列名称
            2. autoAck：是否自动确认
            3. callback：回调对象

         */
        // 接收消息
        Consumer consumer = new DefaultConsumer(channel){
            /*
                回调方法，当收到消息后，会自动执行该方法

                1. consumerTag：标识
                2. envelope：获取一些信息，交换机，路由key...
                3. properties:配置信息
                4. body：数据

             */
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
              /*  System.out.println("consumerTag："+consumerTag);
                System.out.println("Exchange："+envelope.getExchange());
                System.out.println("RoutingKey："+envelope.getRoutingKey());
                System.out.println("properties："+properties);*/
                System.out.println("body："+new String(body));
                System.out.println("将日志信息打印到控制台.....");
            }
        };
        channel.basicConsume(queue1Name,true,consumer);


        //关闭资源？不要

    }
}

消费者2

package com.mq.mqconsumer;

import com.rabbitmq.client.*;

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

public class Consumer_PubSub2 {
    public static void main(String[] args) throws IOException, TimeoutException {

        //创建连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        //主机地址;默认为 localhost
        connectionFactory.setHost("localhost");
        //连接端口;默认为 5672
        connectionFactory.setPort(5672);
        //虚拟主机名称;默认为 /
        connectionFactory.setVirtualHost("/");
        //连接用户名；默认为guest
        connectionFactory.setUsername("guest");
        //连接密码；默认为guest
        connectionFactory.setPassword("guest");

        //创建连接
        Connection connection = null;
        connection = connectionFactory.newConnection();

        // 创建频道
        Channel channel = null;

        channel = connection.createChannel();


        String queue1Name = "test_fanout_queue1";
        String queue2Name = "test_fanout_queue2";


        /*
        basicConsume(String queue, boolean autoAck, Consumer callback)
        参数：
            1. queue：队列名称
            2. autoAck：是否自动确认
            3. callback：回调对象

         */
        // 接收消息
        Consumer consumer = new DefaultConsumer(channel){
            /*
                回调方法，当收到消息后，会自动执行该方法

                1. consumerTag：标识
                2. envelope：获取一些信息，交换机，路由key...
                3. properties:配置信息
                4. body：数据

             */
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
              /*  System.out.println("consumerTag："+consumerTag);
                System.out.println("Exchange："+envelope.getExchange());
                System.out.println("RoutingKey："+envelope.getRoutingKey());
                System.out.println("properties："+properties);*/
                System.out.println("body："+new String(body));
                System.out.println("将日志信息保存数据库2.....");
            }
        };
        channel.basicConsume(queue2Name,true,consumer);


        //关闭资源？不要

    }
}