RabbitMQ: Publish/Subscribe结构

生产者

package com.qf.mq2302.publishSub;

import com.qf.mq2302.utils.MQUtils;

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

public class EmitLog {
    private static final String EXCHANGE_NAME = "logs";

    public static void main(String[] args) throws Exception {

        Connection conn = MQUtils.getConnection();
        Channel channel = conn.createChannel();

        // 在mq中声明一个交换机
        /**
         * 第一个参数：交换机的名字
         * 第二个参数：交换机的类型，fanout代表该交换机会把收到的消息无差别投递给所有他关联的队列
         */
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");

        String msg = "hello fanout!";

        /**
         * 第一个参数，交换机的名字
         * 第二个参数：如果交换机是 fanout类型的，可以写空串 ；因为fanout类型的交换机会把消息无差别向关联队列投递
         */
        channel.basicPublish(EXCHANGE_NAME,"",null,msg.getBytes("utf-8"));


        channel.close();
        conn.close();
    }
}

消费者1

package com.qf.mq2302.publishSub;

import com.qf.mq2302.utils.MQUtils;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DeliverCallback;
import com.rabbitmq.client.Delivery;

import java.io.IOException;

public class ReceiveLogs01 {
    private static final String EXCHANGE_NAME = "logs";

    public static void main(String[] args) throws Exception {

        Connection conn = MQUtils.getConnection();
        Channel channel = conn.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
        // 在mq中声明一个名字是随机字符串的队列（队列的所有属性都是默认值），返回队列的名字
        String queueName = channel.queueDeclare().getQueue();
        // 把队列和交换机建立好绑定关系
        /**
         * 参数1: 队列名
         * 参数2: 交换机名
         * 参数3: routingkey,注意，如果交换机是fanout类型，可以写空串
         */
        channel.queueBind(queueName,EXCHANGE_NAME,"");

        channel.basicQos(1);
        channel.basicConsume(queueName, false, new DeliverCallback() {
            @Override
            public void handle(String consumerTag, Delivery message) throws IOException {
                byte[] body = message.getBody();
                String msg = new String(body, "utf-8");
                System.out.println("01:"+msg);

                // 手动ack
                channel.basicAck(message.getEnvelope().getDeliveryTag(),false);
            }
        },c -> {});

    }
}

消费者2

package com.qf.mq2302.publishSub;

import com.qf.mq2302.utils.MQUtils;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DeliverCallback;
import com.rabbitmq.client.Delivery;

import java.io.IOException;

public class ReceiveLogs02 {
    private static final String EXCHANGE_NAME = "logs";

    public static void main(String[] args) throws Exception {

        Connection conn = MQUtils.getConnection();
        Channel channel = conn.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
        // 在mq中声明一个名字是随机字符串的队列（队列的所有属性都是默认值），返回队列的名字
        String queueName = channel.queueDeclare().getQueue();
        // 把队列和交换机建立好绑定关系
        /**
         * 参数1: 队列名
         * 参数2: 交换机名
         * 参数3: routingkey,注意，如果交换机是fanout类型，可以写空串
         */
        channel.queueBind(queueName,EXCHANGE_NAME,"");

        channel.basicQos(1);
        channel.basicConsume(queueName, false, new DeliverCallback() {
            @Override
            public void handle(String consumerTag, Delivery message) throws IOException {
                byte[] body = message.getBody();
                String msg = new String(body, "utf-8");
                System.out.println("02:"+msg);

                // 手动ack
                channel.basicAck(message.getEnvelope().getDeliveryTag(),false);
            }
        },c -> {});

    }
}

消费者3

package com.qf.mq2302.publishSub;

import com.qf.mq2302.utils.MQUtils;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DeliverCallback;
import com.rabbitmq.client.Delivery;

import java.io.IOException;

public class ReceiveLogs03 {
    private static final String EXCHANGE_NAME = "logs";

    public static void main(String[] args) throws Exception {

        Connection conn = MQUtils.getConnection();
        Channel channel = conn.createChannel();
        channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
        // 在mq中声明一个名字是随机字符串的队列（队列的所有属性都是默认值），返回队列的名字
        String queueName = channel.queueDeclare().getQueue();
        // 把队列和交换机建立好绑定关系
        /**
         * 参数1: 队列名
         * 参数2: 交换机名
         * 参数3: routingkey,注意，如果交换机是fanout类型，可以写空串
         */
        channel.queueBind(queueName,EXCHANGE_NAME,"");

        channel.basicQos(1);
        channel.basicConsume(queueName, false, new DeliverCallback() {
            @Override
            public void handle(String consumerTag, Delivery message) throws IOException {
                byte[] body = message.getBody();
                String msg = new String(body, "utf-8");
                System.out.println("03:"+msg);

                // 手动ack
                channel.basicAck(message.getEnvelope().getDeliveryTag(),false);
            }
        },c -> {});

    }
}