RabbitMQ消息模型之Topic消息模型

Topic消费模型

*  通配符模型
*      生产者必须指定完整且准确的路由key
*      消费者可以使用通配符
*          *：可以替代一级的任意字符 add.*     ==>     add.user                add.goods
*          #：可以替代多级的任意字符 add.#     ==>     add.user.name           add.user.name.firstName

生产者

package com.example.demo02.mq.topic;

import com.example.demo02.mq.util.ConnectionUtils;
import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;

import java.io.IOException;

/**
 * @author Allen
 * 4/11/2024 10:15 AM
 * @version 1.0
 * @description: 通配符模型发送者
 *  通配符模型
 *      生产者必须指定完整且准确的路由key
 *      消费者可以使用通配符
 *          *：可以替代一级的任意字符 add.*     ==>     add.user                add.goods
 *          #：可以替代多级的任意字符 add.#     ==>     add.user.name           add.user.name.firstName
 */
public class TopicSender {
    public static void main(String[] args) throws Exception {
        // 1：获取连接
        Connection connection = ConnectionUtils.getConnection();
        // 2：创建通道
        Channel channel = connection.createChannel();
        // 3：声明交换机
        channel.exchangeDeclare("topic.exchange", BuiltinExchangeType.TOPIC,false);
        // 4：发送消息 路由Key写法 goods.add 不要使用通配符
        String msg1 = "商品新增了，Topic模型，routing key 为 goods.add";
        String msg2 = "商品修改了，Topic模型，routing key 为 goods.update";
        String msg3 = "商品删除了，Topic模型，routing key 为 goods.delete";
        String msg4 = "用户新增了，Topic模型，routing key 为 user.add";
        String msg5 = "用户修改了，Topic模型，routing key 为 user.update";
        String msg6 = "用户删除了，Topic模型，routing key 为 user.delete";
        String msg7 = "添加了用户名字，Topic模型，routing key 为 user.add.name";
        String msg8 = "添加了用户年龄，Topic模型，routing key 为 user.add.age";
        String msg9 = "修改了用户名字，Topic模型，routing key 为 user.update.name";
        String msg10 = "修改了用户年龄，Topic模型，routing key 为 user.update.age";


        channel.basicPublish("topic.exchange","goods.add",null,msg1.getBytes());
        channel.basicPublish("topic.exchange","goods.update",null,msg2.getBytes());
        channel.basicPublish("topic.exchange","goods.delete",null,msg3.getBytes());
        channel.basicPublish("topic.exchange","user.add",null,msg4.getBytes());
        channel.basicPublish("topic.exchange","user.update",null,msg5.getBytes());
        channel.basicPublish("topic.exchange","user.delete",null,msg6.getBytes());
        channel.basicPublish("topic.exchange","user.add.name",null,msg7.getBytes());
        channel.basicPublish("topic.exchange","user.add.age",null,msg8.getBytes());
        channel.basicPublish("topic.exchange","user.update.name",null,msg9.getBytes());
        channel.basicPublish("topic.exchange","user.update.age",null,msg10.getBytes());

        // 5：关闭连接
        channel.close();
        connection.close();
    }
}

消费者1

package com.example.demo02.mq.topic;

import com.example.demo02.mq.util.ConnectionUtils;
import com.rabbitmq.client.*;

import java.io.IOException;

/**
 * @author Allen
 * 4/11/2024 10:22 AM
 * @version 1.0
 *
 * @description: 通配符模型接收者1
 */
public class TopicReceiver1 {
    public static void main(String[] args) throws Exception {
        // 1：获取连接
        Connection connection = ConnectionUtils.getConnection();
        // 2：创建通道
        Channel channel = connection.createChannel();
        // 3：声明交换机
        channel.exchangeDeclare("topic.exchange", BuiltinExchangeType.TOPIC,false);
        // 4：声明队列
        channel.queueDeclare("topic.queue1", false, false, false, null);
        // 5：绑定队列到交换机   使用通配符* 一级任意字符  # 多级任意字符
        channel.queueBind("topic.queue1", "topic.exchange", "goods.*");
        // 6：消费消息
        Consumer consumer = new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {

                System.out.println("商品模块接收到的消息是：" + new String(body));
                channel.basicAck(envelope.getDeliveryTag(),false);
            }
        };
        channel.basicConsume("topic.queue1",false,consumer);

    }
}

消费者2

package com.example.demo02.mq.topic;

import com.example.demo02.mq.util.ConnectionUtils;
import com.rabbitmq.client.*;

import java.io.IOException;

/**
 * @author Allen
 * 4/11/2024 10:22 AM
 * @version 1.0
 *
 * @description: 通配符模型接收者2
 */
public class TopicReceiver2 {
    public static void main(String[] args) throws Exception {
        // 1：获取连接
        Connection connection = ConnectionUtils.getConnection();
        // 2：创建通道
        Channel channel = connection.createChannel();
        // 3：声明交换机
        channel.exchangeDeclare("topic.exchange", BuiltinExchangeType.TOPIC,false);
        // 4：声明队列
        channel.queueDeclare("topic.queue2", false, false, false, null);
        // 5：绑定队列到交换机  使用通配符 user.*  user.#
        channel.queueBind("topic.queue2", "topic.exchange", "user.#");
        // 6：消费消息
        Consumer consumer = new DefaultConsumer(channel){
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {

                System.out.println("用户模块接收到的消息是：" + new String(body));
                channel.basicAck(envelope.getDeliveryTag(),false);
            }
        };
        channel.basicConsume("topic.queue2",false,consumer);

    }
}

结果