消息队列RocketMQ版时间-阿里云

弥补延时消息的不足，RocketMQ 基于时间轮算法实现了定时消息！

大家好，我是君哥。在 RocketMQ 4.x 版本，使用延时消息来实现消息的定时消费。延时消息可以一定程度上实现定时发送，但是有一些局限。RocketMQ 新版本基于时间轮算法引入了定时消息，目前，精确到秒级的定时消息实现的 pr 已经提交到社区，今天来介绍一下。1 延时消息1.1 简介Rocke...

扩展RocketMQ 使其支持任意时间精度的消息延迟（2）

延迟发送逻辑根据延迟时间和当前时间差值计算延迟等级Integer level = DelayLevelCalculate.calculateDefault(l);标记该消息为延迟消息希望该消息被消费的时候若发现是延迟消息即还未到消费的时间则不消费再次的触发生产者生产一次该消息fillMess...

扩展RocketMQ 使其支持任意时间精度的消息延迟（1）

前言本想使用rocketmq的延迟消息特性，但延迟的范围有限，仅支持 1s 5s 10s 30s 1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 20m 30m 1h 2h 这18个等级，之外的延迟时间不支持，本文是为了说明如何利用rocketmq的延迟消息实现任意时间的消息延迟，如何...

RocketMq 时间点消费消息无效怎么办？：报错

我的业务场景是，前10天一直有消息堆积，业务方没有消费，第11天业务方开始消费，但希望从当前时间开始消费，以前的消息不处理；通过看官方提供的例子，找到如下测试代码，但测试时发现，重新定义一个新消费组，1分钟前的消息依然能消费，请高手指点。 public static void main(Strin...

关于比赛时RocketMQ给定数据的时间顺序问题。

请问，到比赛使RocketMQ中给定的数据是有序的还是无序的。如果是无序的，大体无序到什么程度呢？希望解答以下。

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更新时间 2022-12-13 18:03:19

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