RabbitMQ(4) TopicExchange

topic 是RabbitMQ中最灵活的一种方式，可以根据routing_key自由的绑定不同的队列

生产者工程

package com.example.demo.rabbitMq.exchange.topic;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class TopicRabbitConfig {

    public static final String TOPIC_MESSAGE = "topic.message";
    public static final String TOPIC_MESSAGE_S = "topic.messages";
    public static final String USER_MESSAGE = "user.message";

    /**
     * 武器库
     */
    public static final String ARM_QUEUE = "arm.queue";

    @Bean
    public Queue queueTopicMessage() {
        return new Queue(TopicRabbitConfig.TOPIC_MESSAGE);
    }

    @Bean
    public Queue queueTopicMessages() {
        return new Queue(TopicRabbitConfig.TOPIC_MESSAGE_S);
    }

    @Bean
    public Queue queueUserMessage() {
        return new Queue(TopicRabbitConfig.USER_MESSAGE);
    }

    @Bean
    public Queue queueArm() {
        return new Queue(TopicRabbitConfig.ARM_QUEUE);
    }

    @Bean
    TopicExchange exchange() {
        return new TopicExchange("topicExchange");
    }

    @Bean
    Binding bindingExchangeMessage(Queue queueTopicMessage, TopicExchange exchange) {
        //所有匹配routingKey=topic.message的消息，将放入Queue[name="topic.message"]
        return BindingBuilder.bind(queueTopicMessage).to(exchange).with("topic.message");
    }

    @Bean
    Binding bindingExchangeMessages(Queue queueTopicMessages, TopicExchange exchange) {
        //所有匹配routingKey=topic.# 的消息，将放入Queue[name="topic.messages"]
        return BindingBuilder.bind(queueTopicMessages).to(exchange).with("topic.#");
    }

    @Bean
    Binding bindingExchangeUserMessage(Queue queueUserMessage, TopicExchange exchange) {
        ///所有匹配routingKey=user.# 的消息，将放入Queue[name="user.messages"]
        return BindingBuilder.bind(queueUserMessage).to(exchange).with("user.#");
    }

    @Bean
    Binding bindingExchangeArm(Queue queueArm, TopicExchange exchange) {
        return BindingBuilder.bind(queueArm).to(exchange).with("arm.#");
    }
}

发送消息

package com.example.demo.rabbitMq.exchange.topic;

import com.example.demo.dto.User;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class TopicSender {
    @Autowired
    private AmqpTemplate rabbitTemplate;

    public void send1() {
        User user = new User();
        user.setUserName("Sender1.....");
        user.setMobile("1111111111");
        rabbitTemplate.convertAndSend("topicExchange","topic.message",user);
    }

    public void send2() {
        User user = new User();
        user.setUserName("Sender2.....");
        user.setMobile("2222222");
        rabbitTemplate.convertAndSend("topicExchange","topic.messages",user);
    }

    public void send3() {
        User user = new User();
        user.setUserName("Sender3.....");
        user.setMobile("33333");
        rabbitTemplate.convertAndSend("topicExchange","user.message",user);
    }
}

消费者工程

package com.example.demo.rabbitMq.exchange.topic;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class TopicRabbitConstant {
    public static final String TOPIC_MESSAGE = "topic.message";
    public static final String TOPIC_MESSAGE_S = "topic.messages";
    public static final String USER_MESSAGE = "user.message";
}

package com.example.demo.rabbitMq.exchange.topic;

import com.example.demo.dto.User;
import com.example.demo.utils.Base64Utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.IOException;

@Component
@RabbitListener(queues = TopicRabbitConstant.TOPIC_MESSAGE)
public class TopicReceiver1 {

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private AmqpTemplate rabbitTemplate;

    @RabbitHandler
    public void process(User user) {
        System.out.println("Receiver1  : " + user);
    }

    public void rev1(){
        //手动去获取消息
        logger.info("获取Queue[topic.message]消息>>>");
        Message mesg = rabbitTemplate.receive("topic.message");
        System.out.println(mesg);
        if(null != mesg){
            byte[] body = mesg.getBody();
            try {
                User u = (User) Base64Utils.byteToObj(body);
                //获取字符串数据
                System.out.println(u);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
        }
    }
}

测试：

启动消费者工程，生产者，执行如下方法

    @Test
    public void send1() throws Exception {
        //会匹配到topic.#和topic.message 两个Receiver都可以收到消息
        for (int i = 0, size = 10; i < size; i++) {
            topicSender.send1();
        }
    }

也可以不用监听的方式，手动自主获取队列消息，如消费工程：

例如生产者工程TopicRabbitConfig.java添加武器队列：

    /**
     * 武器库
     */
    public static final String ARM_QUEUE = "arm.queue";

    @Bean
    public Queue queueArm() {
        return new Queue(TopicRabbitConfig.ARM_QUEUE);
    }

     @Bean
    Binding bindingExchangeArm(Queue queueArm, TopicExchange exchange) {
        return BindingBuilder.bind(queueArm).to(exchange).with("arm.#");
    }

生产武器：

 public void send4() {
        //生产一批武器
        List<String> list = new ArrayList<String>();

        list.add("手枪");
        list.add("步枪");
        list.add("机枪");

        rabbitTemplate.convertAndSend("topicExchange","arm.gun",list);
    }

    @Test
    public void send4() throws Exception {
        topicSender.send4();
    }

消费者：

package com.example.demo.rabbitMq;

import com.example.demo.dto.User;
import com.example.demo.rabbitMq.exchange.topic.TopicReceiver1;
import com.example.demo.utils.Base64Utils;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.Message;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;
import java.io.IOException;
import java.util.List;

@SpringBootTest
@RunWith(SpringRunner.class)
public class RabbitMqRevTest {
    private Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private AmqpTemplate rabbitTemplate;

    @Test
    public void topicRev1(){
        rev1();
    }

    public void rev1(){
        //手动去获取消息
        logger.info("获取Queue[arm.gun]消息>>>");
        Message mesg = rabbitTemplate.receive("arm.queue");
        System.out.println(mesg);
        if(null != mesg){
            byte[] body = mesg.getBody();
            try {
                List u = (List) Base64Utils.byteToObj(body);
                //获取字符串数据
                System.out.println(u);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
        }
    }
}

测试：

样例代码：

https://github.com/xiaozhuanfeng?tab=repositories

RabbitMQ(4) TopicExchange

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