做网站学/关键洞察力

上一篇已经讲述了实现死信队列的rabbitMQ服务配置，可以点击: RabbitMQ的延迟队列实现(笔记一)

搭建一个新的springboot项目

1.相关核心依赖如下

		<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--mq依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-amqp</artifactId></dependency><!-- lombok 依赖 --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency>

2.配置文件如下

server:port: 8080spring:#MQ配置rabbitmq:host: ipport: 5673username: rootpassword: root+12345678

3.目录结构

模仿订单延迟支付过期操作

1.创建OrderMqConstant.java，设定常量，代码如下

package com.example.aboutrabbit.constant;
/*** @description 订单队列常量* @author lxh* @time 2024/2/7 17:05*/
public interface OrderMqConstant {/***交换机*/String exchange = "order-event-exchange";/*** 队列*/String orderQueue = "order.delay.queue";/*** 路由*/String orderDelayRouting = "order.delay.routing";
}

2.创建OrderDelayConfig.java，配置绑定

package com.example.aboutrabbit.config;import com.example.aboutrabbit.constant.OrderMqConstant;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import java.util.HashMap;
import java.util.Map;/*** @author lxh* @description 配置绑定* @time 2024/2/7 17:15**/
@Configuration
public class OrderDelayConfig {/*** 延时队列交换机* 注意这里的交换机类型：CustomExchange*/@Beanpublic CustomExchange maliceDelayExchange() {Map<String, Object> args = new HashMap<>();args.put("x-delayed-type", "direct");// 属性参数 交换机名称 交换机类型 是否持久化 是否自动删除 配置参数return new CustomExchange(OrderMqConstant.exchange, "x-delayed-message", true, false, args);}/*** 延时队列*/@Beanpublic Queue maliceDelayQueue() {// 属性参数 队列名称 是否持久化return new Queue(OrderMqConstant.orderQueue, true);}/*** 给延时队列绑定交换机*/@Beanpublic Binding maliceDelayBinding() {return BindingBuilder.bind(maliceDelayQueue()).to(maliceDelayExchange()).with(OrderMqConstant.orderDelayRouting).noargs();}
}

3、创建 OrderMQReceiver.java监听过期的消息

package com.example.aboutrabbit.config;import com.example.aboutrabbit.constant.OrderMqConstant;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;import java.text.SimpleDateFormat;
import java.util.Date;/*** @author lxh* @description 接收过期订单* @time 2024/2/7 17:21**/
@Component
@Slf4j
public class OrderMQReceiver {@RabbitListener(queues = OrderMqConstant.orderQueue)public void onDeadMessage(String infoId) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");log.info("收到头框过期时间:{},消息是:{}", sdf.format(new Date()), infoId);}
}

4.分别创建MQService.java和MQServiceImpl.java，处理消息发送

package com.example.aboutrabbit.service;
/*** @description MQ发消息服务* @author lxh* @time 2024/2/7 17:26*/
public interface MQService {/*** 发送或加队列* @param orderId 订单主键* @param time 毫秒*/void sendOrderAddInfo(Long orderId, Integer time);
}

package com.example.aboutrabbit.service.impl;import com.example.aboutrabbit.constant.OrderMqConstant;
import com.example.aboutrabbit.service.MQService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.text.SimpleDateFormat;
import java.util.Date;/*** @author lxh* @description MQ发消息服务实现* @time 2024/2/7 17:26**/
@Slf4j
@Service
public class MQServiceImpl implements MQService {@Autowiredprivate RabbitTemplate rabbitTemplate;/*** 发送或加队列* @param orderId 订单主键* @param time 毫秒*/@Overridepublic void sendOrderAddInfo(Long orderId, Integer time) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");log.info("过期队列添加|添加时间：{}，内容是：{}，过期毫秒数：{}",sdf.format(new Date()),orderId, time);rabbitTemplate.convertAndSend(OrderMqConstant.exchange, OrderMqConstant.orderDelayRouting,orderId,message -> {message.getMessageProperties().setDelay(time);return message;});}
}

5.创建控制层进行测试TestController.java

package com.example.aboutrabbit.controller;import com.example.aboutrabbit.service.MQService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;/*** @author lxh* @description 测试* @time 2024/2/7 17:36**/
@RestController
@RequestMapping("/test")
public class TestController {@Autowiredprivate MQService mqService;@GetMapping("/send")public String list(@RequestParam Long orderId,@RequestParam Integer fenTime) {//默认Integer time = fenTime * 60 * 1000;mqService.sendOrderAddInfo(orderId, time);return "success";}
}

6.全部结构展示

启动项目进行测试

1.示例：localhost:8080/test/send?orderId=1&fenTime=1
订单id为1的延迟一分钟过期，如下

2.查看日志