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RabbitMQ路由键与队列的绑定

需求: 通过死信队列与延时队列定时释放订单

// 订单创建成功,发送到延时队列中
rabbitTemplate.convertAndSend("order-event-exchange","order.create.order",order.getOrder());




// 根据路由键order.create.order,找到绑定的队列是一个延时队列 order.delay.queue
@Bean
public Binding orderCreateBinding() {
    /*
     * String destination, 目的地(队列名或者交换机名字)
     * DestinationType destinationType, 目的地类型(Queue、Exhcange)
     * String exchange,
     * String routingKey,
     * Map<String, Object> arguments
     * */
    return new Binding("order.delay.queue",
            Binding.DestinationType.QUEUE,
            "order-event-exchange",
            "order.create.order",
            null);
}





// x-dead-letter-routing-key,代表延时队列到期后,走 order.release.order 路由键
@Bean
public Queue orderDelayQueue() {
    /*
        Queue(String name,  队列名字
        boolean durable,  是否持久化
        boolean exclusive,  是否排他
        boolean autoDelete, 是否自动删除
        Map<String, Object> arguments) 属性
     */
    HashMap<String, Object> arguments = new HashMap<>();
    arguments.put("x-dead-letter-exchange", "order-event-exchange");
    arguments.put("x-dead-letter-routing-key", "order.release.order");
    arguments.put("x-message-ttl", 60000); // 消息过期时间 1分钟
    Queue queue = new Queue("order.delay.queue", true, false, false, arguments);

    return queue;
}






// 最后就路由到order.release.order.queue队列
@Bean
public Binding orderReleaseBinding() {

    return new Binding("order.release.order.queue",
            Binding.DestinationType.QUEUE,
            "order-event-exchange",
            "order.release.order",
            null);
}



// 然后就是监听消费消息
package com.xunqi.gulimall.order.listener;

import com.rabbitmq.client.Channel;
import com.xunqi.gulimall.order.entity.OrderEntity;
import com.xunqi.gulimall.order.service.OrderService;
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.Service;

import java.io.IOException;

/**
 * @Description: 定时关闭订单
 * @Created: with IntelliJ IDEA.
 * @author: 夏沫止水
 * @createTime: 2020-07-07 09:54
 **/

@RabbitListener(queues = "order.release.order.queue")
@Service
public class OrderCloseListener {

    @Autowired
    private OrderService orderService;

    @RabbitHandler
    public void listener(OrderEntity orderEntity, Channel channel, Message message) throws IOException {
        System.out.println("收到过期的订单信息,准备关闭订单" + orderEntity.getOrderSn());
        try {
            orderService.closeOrder(orderEntity);
            channel.basicAck(message.getMessageProperties().getDeliveryTag(),false);
        } catch (Exception e) {
            channel.basicReject(message.getMessageProperties().getDeliveryTag(),true);
        }

    }

}

todo 这其实不能单独成一篇文章,有时间给合并或者删除吧

凡人与圣人的差别就在眼前的那一张纸,凡人投胎转世都带着前世死去时蒙在脸上的蒙脸纸,只有圣人是被天神揭去了那张纸投胎的。

白鹿原


原文地址:https://blog.csdn.net/weixin_44431371/article/details/143389389

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