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文章 2017-09-05 来自：开发者社区

#pragma once 与 #ifndef 解析

为了避免同一个文件被include多次，C/C++中有两种方式，一种是#ifndef方式，一种是#pragma once方式。在能够支持这两种方式的编译器上，二者并没有太大的区别，但是两者仍然还是有一些细微的区别。方式一： 1 2 3 4 #ifndef __SOMEFILE_H__ #define __SOM...

文章 2017-03-06 来自：开发者社区

性能、稳定性、反压、Exactly Once，Jstorm开源最佳实践全解析

在2017年在线技术峰会——阿里开源项目最佳实践上，来自阿里巴巴中间件的技术专家卫乐分享了Jstorm开源最佳实践。他主要介绍了Jstorm的架构，从性能、稳定性、监控系统、大规模部署、反压、灰度发布&热升级、Exactly-Once、新的窗口机制等方面详细扥想了Jstorm做的优化。以下内容根据直播视频整理而成。关于阿里中间件，欢迎访问官网了解更多：https://www.aliy.....

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