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@[TOC] 为什么要学RocketMQ源码编写优雅、高效的代码。RocketMQ作为阿里双十一交易核心链路产品，支撑千万级并发、万亿级数据洪峰。读源码可以积累编写高效、优雅代码的经验。提升微观的架构设计能力，重点在思维和理念。Apache RocketMQ作为Apache顶级项目，它的架构设计...

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RocketMQ的前提回顾RocketMQ是一款分布式、队列模型的消息中间件，具有以下特点：能够保证严格的消息顺序提供丰富的消息拉取模式高效的订阅者水平扩展能力实时的消息订阅机制亿级消息堆积能力为什么使用RocketMQ强调集群无单点，可扩展，任意一点高可用、水平可扩展海量消息堆积能力，消息堆积后写...

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痛点背景业务场景假设有这么一个需求，用户下单后如果30分钟未支付，则该订单需要被关闭。你会怎么做？之前方案最简单的做法，可以服务端启动个定时器，隔个几秒扫描数据库中待支付的订单，如果(当前时间-订单创建时间)>30分钟，则关闭订单。方案评估优点：是实现简单，缺点呢&...

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上一篇RocketMq源码调试环境搭建已经讲解了如何编译、调试及配置从github上拉下来的rocketmq项目。接下来开始逐步分析rocketmq nameserver源码。第一步，先找到入口函数org.apache.rocketmq.namesrv.NamesrvStartup这个类里面的mai...

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你好，我是程序员Alan,很高兴遇见你。一、RocketMQ目录结构在正式开始搭建调试环境之前，我们先了解一下RockeMQ源码的整体架构。这是因为掌握了整体架构，可以让我们迅速了解各个方面的特性，并且可以方便我们后续快速定位功能模块对应的代码文件。话不多说，我们开始看RocketMQ目录结构。ac...

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