springboot+rabbitmq路由模式

springboot+rabbitmq路由模式

路由模式是把队列通过rout绑定到交换机上

首先是POM

        
            org.springframework.boot
            spring-boot-starter-web
        
        
        
            com.alibaba
            fastjson
            1.2.75
        
        
            org.springframework.boot
            spring-boot-starter-amqp
        

生产者 配置文件

server:
  port: 7001
spring:
  rabbitmq:
    host: localhost
    port: 5672
    username: xx
    password: xx
    virtual-host: /

常量类

package com.example.rabbitmq.constant;

public class Constant {

    //队列名称
    public static final String DIRECT_QUEUE_NAME02 = "testDirectQueue02";
    //队列名称
    public static final String DIRECT_QUEUE_NAME = "testDirectQueue";

    //交换机名称
    public static final String DIRECT_EXCHANGE_NAME = "testDirectExchange";

    //交换机绑定rout
    public static final String DIRECT_ROUTING = "testDirectRouting";
    //交换机绑定rout
    public static final String DIRECT_ROUTING02 = "testDirectRouting02";
}

rabbitmq配置类

package com.example.rabbitmq.config;

import com.example.rabbitmq.constant.Constant;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;


@Configuration
public class RabbitConfig {

    // durable:是否持久化,默认是false,持久化队列：会被存储在磁盘上，当消息代理重启时仍然存在，暂存队列：当前连接有效
    // exclusive:默认也是false，只能被当前创建的连接使用，而且当连接关闭后队列即被删除。此参考优先级高于durable
    // autoDelete:是否自动删除，当没有生产者或者消费者使用此队列，该队列会自动删除。
    //   return new Queue("TestDirectQueue",true,true,false);
    //一般设置一下队列的持久化就好,其余两个就是默认false
    @Bean
    public Queue testDirectQueue() {
        //第一个队列
        return new Queue(Constant.DIRECT_QUEUE_NAME, true);
    }

    // 路由模式 start
    // 生产者通过路由方式 把队列绑定到交换机上
    // 消息对于多个消费者来说 消息只能被消费一次
    // 生产消息的时候指定交换机和路由，就会发送到绑定的队列上面
    // 消费者只要消费指定的队列就可以了 不会消费同一个交换机上的其他队列
    // 也就是说一个交换机可以绑定多个队列

    //Direct交换机 起名：testDirectExchange
    @Bean
    public DirectExchange testDirectExchange() {
        return new DirectExchange(Constant.DIRECT_EXCHANGE_NAME, true, false);
    }

    //把第一个队列和交换机绑定
    @Bean
    public Binding bindingDirect() {
        return BindingBuilder.bind(testDirectQueue()).to(testDirectExchange()).with(Constant.DIRECT_ROUTING);
    }
    // 路由模式 end

    @Bean
    public Queue testDirectQueue02(){
        //第二个队列
        return new Queue(Constant.DIRECT_QUEUE_NAME02,true);
    }

    //第二个队列和交换机绑定
    @Bean
    public Binding bindingDirect02() {
        return BindingBuilder.bind(testDirectQueue02()).to(testDirectExchange()).with(Constant.DIRECT_ROUTING02);
    }
}

controller  这里总共调用了10次接口，发现消费者总共消费了10次，因为虽然是同一个交换机  但是绑定的队列不一样，消费者消费的是队列 不是交换机

package com.example.rabbitmq.controller;

import com.alibaba.fastjson.JSON;
import com.example.rabbitmq.constant.Constant;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

@RestController
public class RabbitmqController {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @RequestMapping("/directMq")
    public void directMq() {
        Map map = new HashMap<>();
        map.put("messageId", UUID.randomUUID());
        map.put("messageData", "hello testDirect");
        map.put("createTime", System.currentTimeMillis());
        //Constant.DIRECT_ROUTING 对应的队列是testDirectQueue
        rabbitTemplate.convertAndSend(Constant.DIRECT_EXCHANGE_NAME, Constant.DIRECT_ROUTING, JSON.toJSonString(map));
        //Constant.DIRECT_ROUTING02 对应的队列是testDirectQueue02
        rabbitTemplate.convertAndSend(Constant.DIRECT_EXCHANGE_NAME, Constant.DIRECT_ROUTING02, JSON.toJSonString(map));
        //rabbitTemplate.convertAndSend(Constant.DIRECT_QUEUE_NAME,JSON.toJSonString(map));
    }
}

消费者 配置文件

server:
  port: 7002
spring:
  rabbitmq:
    host: localhost
    port: 5672
    username: xx
    password: xx
    virtual-host: /
    listener:
      simple:
        acknowledge-mode: manual
        retry:
          enabled: true
        prefetch: 1

消费者1代码

package com.example.rabbitmq.mq;

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

@Component
public class RabbitmqListener {

    @RabbitListener(queues = "testDirectQueue")
    public void listener(Message message, @Header(AmqpHeaders.DELIVERY_TAG) long deliveryTag, Channel channel) {
        String msg = new String(message.getBody(), StandardCharsets.UTF_8);
        System.out.println("01==" + msg);
        try {
            channel.basicAck(deliveryTag,false);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

消费者2代码

package com.example.rabbitmq.mq;

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

@Component
public class RabbitmqListener {

    @RabbitListener(queues = "testDirectQueue")
    public void listener(Message message, @Header(AmqpHeaders.DELIVERY_TAG) long deliveryTag, Channel channel) {
        String msg = new String(message.getBody(), StandardCharsets.UTF_8);
        System.out.println("02==" + msg);
        try {
            channel.basicAck(deliveryTag,false);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

发送10条消息查看消费情况

消费者1

消费者2

这里修改下代码，

        消费者1消费队列testDirectQueue

        消费者2消费队列testDirectQueue02

只修改消费者2的代码即可

package com.example.rabbitmq.mq;

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

@Component
public class RabbitmqListener {

    @RabbitListener(queues = "testDirectQueue02")
    public void listener(Message message, @Header(AmqpHeaders.DELIVERY_TAG) long deliveryTag, Channel channel) {
        String msg = new String(message.getBody(), StandardCharsets.UTF_8);
        System.out.println("02==" + msg);
        try {
            channel.basicAck(deliveryTag,false);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

再次请求生产者接口10次 发现打印结果是

消费者1

消费者2

再次证明消费者消费的是队列不是交换机