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SpringBoot 使用RabbitMQ 做延时队列

2019-12-23  本文已影响0人  问题_解决_分享_讨论_最优

SpringBoot 使用RabbitMQ 做延时队列

1.下载并安装erlang和RabbitMQ

erlang下载地址 :http://www.erlang.org/downloads
RabbitMQ下载地址:http://www.rabbitmq.com/download.htm

2.SpringBoot整合RabbitMQ

1.创建一个maven项目
2.在application.yml文件添加

spring:
  rabbitmq:
    host: localhost
    port: 5672
    username: guest
    password: guest

3.在pom.xml添加依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>
  1. 实体类
package com.rabbit.demos.pojo;

import lombok.Data;

import java.io.Serializable;

@Data
public class Order implements Serializable {


    private static final long serialVersionUID = -2221214252163879885L;

    private String orderId; // 订单id

    private Integer orderStatus; // 订单状态 0:未支付,1:已支付,2:订单已取消

    private String orderName; // 订单名字

}
  1. 配置队列
package com.rabbit.demos.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

/*
.配置队列
 */
@Configuration
@Slf4j
public class DelayRabbitConfig {


    /**
     * 延迟队列 TTL 名称
     */
    private static final String ORDER_DELAY_QUEUE = "user.order.delay.queue";
    /**
     * DLX,dead letter发送到的 exchange
     * 延时消息就是发送到该交换机的
     */
    public static final String ORDER_DELAY_EXCHANGE = "user.order.delay.exchange";
    /**
     * routing key 名称
     * 具体消息发送在该 routingKey 的
     */
    public static final String ORDER_DELAY_ROUTING_KEY = "order_delay";

    public static final String ORDER_QUEUE_NAME = "user.order.queue";
    public static final String ORDER_EXCHANGE_NAME = "user.order.exchange";
    public static final String ORDER_ROUTING_KEY = "order";

    /**
     * 延迟队列配置
     * <p>
     * 1、params.put("x-message-ttl", 5 * 1000);
     * 第一种方式是直接设置 Queue 延迟时间 但如果直接给队列设置过期时间,这种做法不是很灵活,(当然二者是兼容的,默认是时间小的优先)
     * 2、rabbitTemplate.convertAndSend(book, message -> {
     * message.getMessageProperties().setExpiration(2 * 1000 + "");
     * return message;
     * });
     * 第二种就是每次发送消息动态设置延迟时间,这样我们可以灵活控制
     **/
    @Bean
    public Queue delayOrderQueue() {
        Map<String, Object> params = new HashMap<>();
        // x-dead-letter-exchange 声明了队列里的死信转发到的DLX名称,
        params.put("x-dead-letter-exchange", ORDER_EXCHANGE_NAME);
        // x-dead-letter-routing-key 声明了这些死信在转发时携带的 routing-key 名称。
        params.put("x-dead-letter-routing-key", ORDER_ROUTING_KEY);
        return new Queue(ORDER_DELAY_QUEUE, true, false, false, params);
    }
    /**
     * 需要将一个队列绑定到交换机上,要求该消息与一个特定的路由键完全匹配。
     * 这是一个完整的匹配。如果一个队列绑定到该交换机上要求路由键 “dog”,则只有被标记为“dog”的消息才被转发,
     * 不会转发dog.puppy,也不会转发dog.guard,只会转发dog。
     * @return DirectExchange
     */
    @Bean
    public DirectExchange orderDelayExchange() {
        return new DirectExchange(ORDER_DELAY_EXCHANGE);
    }
    @Bean
    public Binding dlxBinding() {
        return BindingBuilder.bind(delayOrderQueue()).to(orderDelayExchange()).with(ORDER_DELAY_ROUTING_KEY);
    }

    @Bean
    public Queue orderQueue() {
        return new Queue(ORDER_QUEUE_NAME, true);
    }
    /**
     * 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”。
     **/
    @Bean
    public TopicExchange orderTopicExchange() {
        return new TopicExchange(ORDER_EXCHANGE_NAME);
    }

    @Bean
    public Binding orderBinding() {
        // TODO 如果要让延迟队列之间有关联,这里的 routingKey 和 绑定的交换机很关键
        return BindingBuilder.bind(orderQueue()).to(orderTopicExchange()).with(ORDER_ROUTING_KEY);
    }

}

6.发送消息

package com.rabbit.demos.config;


import com.rabbit.demos.pojo.Order;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Date;
/*
发送者
 */
@Component
@Slf4j
public class DelaySender {

    @Autowired
    private AmqpTemplate amqpTemplate;

    public void sendDelay(Order order) {
        log.info("【订单生成时间】" + new Date().toString() +"【1分钟后检查订单是否已经支付】" + order.toString() );
        this.amqpTemplate.convertAndSend(DelayRabbitConfig.ORDER_DELAY_EXCHANGE, DelayRabbitConfig.ORDER_DELAY_ROUTING_KEY, order, message -> {
            // 如果配置了 params.put("x-message-ttl", 5 * 1000); 那么这一句也可以省略,具体根据业务需要是声明 Queue 的时候就指定好延迟时间还是在发送自己控制时间
            message.getMessageProperties().setExpiration(1 * 1000 * 60 + "");
            return message;
        });
    }
}

7.消费消息

package com.rabbit.demos.config;

import com.rabbit.demos.pojo.Order;
import com.rabbitmq.client.Channel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import java.util.Date;
/*
接收者
 */
@Component
@Slf4j
public class DelayReceiver {

    @RabbitListener(queues = {DelayRabbitConfig.ORDER_QUEUE_NAME})
    public void orderDelayQueue(Order order, Message message, Channel channel) {
        log.info("###########################################");
        log.info("【orderDelayQueue 监听的消息】 - 【消费时间】 - [{}]- 【订单内容】 - [{}]",  new Date(), order.toString());
        if(order.getOrderStatus() == 0) {
            order.setOrderStatus(2);
            log.info("【该订单未支付,取消订单】" + order.toString());
        } else if(order.getOrderStatus() == 1) {
            log.info("【该订单已完成支付】");
        } else if(order.getOrderStatus() == 2) {
            log.info("【该订单已取消】");
        }
        log.info("###########################################");
    }
}

8.测试队列

package com.rabbit.demos.Controller;

import com.rabbit.demos.config.DelaySender;
import com.rabbit.demos.pojo.Order;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.DelayQueue;

@RestController
public class TestController {

    @Autowired
    private DelaySender delaySender;

    @GetMapping("/sendDelay")
    public Object sendDelay() {
        Order order1 = new Order();
        order1.setOrderStatus(0);
        order1.setOrderId("123456");
        order1.setOrderName("小米6");

        Order order2 = new Order();
        order2.setOrderStatus(1);
        order2.setOrderId("456789");
        order2.setOrderName("小米8");

        delaySender.sendDelay(order1);
        delaySender.sendDelay(order2);
        return "ok";
    }
}

9.运行结果

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