SpringBoot+RabbitMQ学习笔记（三）使用RabbitMQ的三种交换器之Topic

一丶简介

Topic Exchange 
将路由键和某模式进行匹配。此时队列需要绑定要一个模式上。符号“#”匹配一个或多个词，符号“*”匹配不多不少一个词。因此“audit.#”能够匹配到“audit.irs.corporate”，但是“audit.*” 只会匹配到“audit.irs”。

业务场景：

1.日志服务器记录用户服务、商品服务、订单服务三个服务。

2.日志服务器有三个日志服务：INFO日志处理服务、ERROR日志处理服务、全日志处理服务。

3.使用Topic交换器处理日志，匹配规则依次为：*.log.info、*.log.error和*.log.*。

二丶配置文件

还是创建两个项目，一个作为生产者一个作为消费者。

生产者配置：

server.port=8883

spring.application.name=hello-world

spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.thymeleaf.cache=false

设置交换器名称
mq.config.exchange=log.topic

View Code

消费者配置：

server.port=8884

spring.application.name=lesson1

spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest

#设置交换器名称
mq.config.exchange=log.topic
#info队列名称
mq.config.queue.info=log.info
#error队列名称
mq.config.queue.error=log.error
#log队列名称
mq.config.queue.logs=log.all

View Code

三丶创建生产者

1.订单服务

package com.example.amqptopicprovider;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:模拟订单服务发送消息
 */
@Component
public class OrderSender {

    @Autowired
    private AmqpTemplate amqpTemplate;

    //exChange 交换器
    @Value("${mq.config.exchange}")
    private String exChange;

    /**
     * 发送消息的方法
     * @param msg
     */
    public void send(String msg){
        //向消息队列发送消息
        //参数1：队列名称
        //参数2：消息
        // this.amqpTemplate.convertAndSend("hello-queue",msg);

        //向消息队列发送消息
        //参数1：交换器名称
        //参数2：路由键
        //参数3：消息
        this.amqpTemplate.convertAndSend(exChange,"order.log.debug","order.log.debug-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"order.log.info","order.log.info-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"order.log.warn","order.log.warn-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"order.log.error","order.log.error-"+msg);

    }
}

View Code

2.商品服务

package com.example.amqptopicprovider;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:模拟商品服务发送消息
 */
@Component
public class ProductSender {

    @Autowired
    private AmqpTemplate amqpTemplate;

    //exChange 交换器
    @Value("${mq.config.exchange}")
    private String exChange;

    /**
     * 发送消息的方法
     * @param msg
     */
    public void send(String msg){
        //向消息队列发送消息
        //参数1：队列名称
        //参数2：消息
        // this.amqpTemplate.convertAndSend("hello-queue",msg);

        //向消息队列发送消息
        //参数1：交换器名称
        //参数2：路由键
        //参数3：消息
        this.amqpTemplate.convertAndSend(exChange,"product.log.debug","product.log.debug-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"product.log.info","product.log.info-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"product.log.warn","product.log.warn-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"product.log.error","product.log.error-"+msg);

    }
}

View Code

3.用户服务

package com.example.amqptopicprovider;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:模拟用户服务发送消息
 */
@Component
public class UserSender {

    @Autowired
    private AmqpTemplate amqpTemplate;

    //exChange 交换器
    @Value("${mq.config.exchange}")
    private String exChange;

    /**
     * 发送消息的方法
     * @param msg
     */
    public void send(String msg){
        //向消息队列发送消息
        //参数1：队列名称
        //参数2：消息
        // this.amqpTemplate.convertAndSend("hello-queue",msg);

        //向消息队列发送消息
        //参数1：交换器名称
        //参数2：路由键
        //参数3：消息
        this.amqpTemplate.convertAndSend(exChange,"user.log.debug","user.log.debug-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"user.log.info","user.log.info-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"user.log.warn","user.log.warn-"+msg);
        this.amqpTemplate.convertAndSend(exChange,"user.log.error","user.log.error-"+msg);

    }
}

View Code

四丶创建消费者

1.ERROR日志处理服务

package com.ant.amqptopicconsumer;

import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.rabbit.annotation.*;
import org.springframework.stereotype.Component;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:消息接收者
 * @RabbitListener bindings:绑定队列
 * @QueueBinding  value：绑定队列的名称
 *                  exchange：配置交换器
 * @Queue : value：配置队列名称
 *          autoDelete:是否是一个可删除的临时队列
 * @Exchange value:为交换器起个名称
 *           type:指定具体的交换器类型
 */
@Component
@RabbitListener(
        bindings = @QueueBinding(
                value = @Queue(value = "${mq.config.queue.error}",autoDelete = "true"),
                exchange = @Exchange(value = "${mq.config.exchange}", type = ExchangeTypes.TOPIC),
                key = "*.log.error"
        )
)
public class TopicErrorReceiver {

    /**
     * 接收消息的方法，采用消息队列监听机制
     * @param msg
     */
    @RabbitHandler
    public void process(String msg){
        System.out.println("error-receiver："+msg);
    }
}

View Code

2.INFO日志处理服务

package com.ant.amqptopicconsumer;

import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.rabbit.annotation.*;
import org.springframework.stereotype.Component;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:消息接收者
 * @RabbitListener bindings:绑定队列
 * @QueueBinding  value：绑定队列的名称
 *                  exchange：配置交换器
 * @Queue : value：配置队列名称
 *          autoDelete:是否是一个可删除的临时队列
 * @Exchange value:为交换器起个名称
 *           type:指定具体的交换器类型
 */
@Component
@RabbitListener(
        bindings = @QueueBinding(
                value = @Queue(value = "${mq.config.queue.info}",autoDelete = "true"),
                exchange = @Exchange(value = "${mq.config.exchange}", type = ExchangeTypes.TOPIC),
                key = "*.log.info"
        )
)
public class TopicInfoReceiver {

    /**
     * 接收消息的方法，采用消息队列监听机制
     * @param msg
     */
    @RabbitHandler
    public void process(String msg){
        System.out.println("info-receiver："+msg);
    }
}

View Code

3.全日志处理服务

package com.ant.amqptopicconsumer;

import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.rabbit.annotation.*;
import org.springframework.stereotype.Component;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:消息接收者
 *
 * @RabbitListener bindings:绑定队列
 * @QueueBinding  value：绑定队列的名称
 *                  exchange：配置交换器
 *                  key:路由键
 * @Queue : value：配置队列名称
 *          autoDelete:是否是一个可删除的临时队列
 * @Exchange value:为交换器起个名称
 *           type:指定具体的交换器类型
 */
@Component
@RabbitListener(
        bindings = @QueueBinding(
                value = @Queue(value = "${mq.config.queue.logs}",autoDelete = "true"),
                exchange = @Exchange(value = "${mq.config.exchange}", type = ExchangeTypes.TOPIC),
                key = "*.log.*"
        )
)
public class TopicLogReceiver {

    /**
     * 接收消息的方法，采用消息队列监听机制
     * @param msg
     */
    @RabbitHandler
    public void process(String msg){
        System.out.println("all-receiver："+msg);
    }
}

View Code

五丶老规矩测试一发

package com.example.amqp;

import com.example.ampq.Sender;
import com.example.amqptopicprovider.OrderSender;
import com.example.amqptopicprovider.ProductSender;
import com.example.amqptopicprovider.UserSender;
import com.example.helloworld.HelloworldApplication;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

/**
 * Author:aijiaxiang
 * Date:2020/4/26
 * Description:
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = HelloworldApplication.class)
public class QueueTest {
    @Autowired
    private Sender sender;

    @Autowired
    private UserSender userSender;

    @Autowired
    private ProductSender productSender;

    @Autowired
    private OrderSender orderSender;

    /**
     * 测试消息队列
     */
//    @Test
//    public void test1() throws InterruptedException {
//        while (true){
//            Thread.sleep(1000);
//            sender.send("hello");
//        }
//
//    }

    @Test
    public void test2(){
        userSender.send("usersend");
        productSender.send("productsend");
        orderSender.send("ordersend");
    }
}

View Code

注：日志服务处理类中的路由键是直接采用了硬编码的方式进行配置，主要是为了方便查看一目了然，但是还是推荐将路由键配置在配置文件中，使用 "${}" 这个方式来进行读取。