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利用TTL结合死信交换机，我们实现了消息发出后，消费者延迟收到消息的效果。这种消息模式就称为延迟队列（Delay Queue）模式。延迟队列的使用场景包括：延迟发送短信用户下单，如果用户在15 分钟内未支付，则自动取消预约工作会议，20分钟后自动通知所有参会人员因为延迟队列的需求非常多...

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RabbitMQ插件实现延迟队列

7.7 RabbitMQ插件实现延迟队列7.7.1 安装插件如果不能实现在消息粒度上的 TTL，并使其在设置的TTL 时间及时死亡，就无法设计成一个通用的延时队列。那如何解决呢，接下来我们就去解决该问题。我们用插件来实现别人写好的功能~安装后，重启rabbitmq-server即可安装成功后，交换机...

RabbitMQ从入门到进阶（初始延迟队列）

七、延迟队列7.1 延迟队列概念延时队列,队列内部是有序的，最重要的特性就体现在它的延时属性上，延时队列中的元素是希望在指定时间到了以后或之前取出和处理，简单来说，延时队列就是用来存放需要在指定时间被处理的元素的队列。7.2 延迟队列使用场景订单在十分钟之内未支付则自动取消新创建的店铺，如果在十天内...

RabbitMQ学习（九）：延迟队列

一、延迟队列概念延时队列中，队列内部是有序的，最重要的特性就体现在它的延时属性上，延时队列中的元素是希望在指定时间到了以后或之前取出和处理。简单来说，延时队列就是用来存放需要在指定时间内被处理的元素的队列。其实延迟队列就是死信队列的一种。二、延迟队列使用场景订单在十分钟之内未支付则自动取消新创建...

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springcloud：安装rabbitmq并配置延迟队列插件

0. 引言本期主要讲解如何利用docker快速安装rabbitmq并且配置延迟队列插件1. docker安装1.1 安装rabbitmq1、下载镜像docker pull rabbitmq2、安装镜像docker run -d --hostname my-rabbit --name rabbit -...

rabbitMQ延时队列与TTL和DLX、延迟队列的相关介绍

场景：“订单下单成功后，15分钟未支付自动取消”1.传统处理超时订单采取定时任务轮训数据库订单，并且批量处理。其弊端也是显而易见的；对服务器、数据库性会有很大的要求，并且当处理大量订单起来会很力不从心,而且实时性也不是特别好。当然传统的手法还可以再优化一下，即存入订单的时候就算出订单的过期时间...

RabbitMQ中延迟队列的全方位解析

前言工作中有些场景需要用到延迟队列，大概对RabbitMQ延迟队列场景有一些了解，网上大部分的场景应用于：订单超时、定时执行等。而我需要延迟队列的场景是：有一批机器需要监控这个延迟队列长度，一旦满足就提前预备机器，准备执行任务。通过监控延迟队列，我可以准确、可靠的清楚，接下来的某个时间...

Spring boot + RabbitMQ延迟队列实战

一、背景延时队列顾名思义，即放置在该队列里面的消息是不需要立即消费的，而是等待一段时间之后取出消费。那么，为什么需要延迟消费呢？我们来看以下的场景:订单业务：在电商/点餐中，都有下单后 30 分钟内没有付款，就自动取消订单。短信通知：下单成功后 60s 之后给用户发送短信通知。失败...

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