前言
以前都是自己做一些玩具项目，技术选型肯定没有考虑那么多，学习阶段往往是要学什么技术，因此用什么技术，在专门为了准备面试的时候可能会去细心雕模一下这个项目，但是没有实际的工程背景，可能大多数也是平地建高楼。在实际的工程阶段，我也好奇项目的负责人是从什么维度进行技术选型的，正好之前在吃饭时候跟我leader聊到了这个话题，因此写篇博客记录一下。
技术列表
首先说一下我们这个项目的技术选型吧。因为我们主要做的是一个业务中台的系统（B/S架构），简单理解就是一个网站，因此选用的技术就是我们日常会学习到的一些技术。
前端：
- 微前端框架qiankun：介绍 - qiankun (umijs.org)
- 公司自研框架：基于vue的封装，类似于umi？
- 公司内部组件库
- 公司内部打包工具：基于webpack的封装
后端：
- 语言：python
- 框架：flask
- ORM：peewee
- 流程引擎：airflow
- 数据库：mysql
- 消息队列：kafaka
- RPC：grpc
其他：
CI/CD：这个忘记了没有深究怎么实现的，流程就是docker打一个镜像然后去内部发布平台发布
外部接口：企微、openai、其他外部系统接口
还有就是其他的nginx网关，基本都用这个，就不再赘述了
选型思想
前端
-
为什么使用微前端框架
当时因为刚进公司不久，真的对这个微前端框架和公司自研的那个非常不熟悉，配置都不知道在哪配，就问了句为什么不使用vue呢？直接纯vue多好，还要用这个微前端框架，我leader给出我的答复是我们因为要兼容老平台，新老平台迁移的时候要把老平台作为一个服务，点击tab栏可以切换，说实话没太懂，兼容的话设置一个超链接跳转过去也可以啊。我的思考点是如果设置一个超链接跳转就意味着分开部署，肯定没有作为某个服务好部署并且在逻辑上也说的通
-
组件库、打包工具的选择
又问了下为啥用公司这个组件库，我还以为是规范统一要求的，结果我leader说了句我当时就知道公司有这个就用了（剧本不是这个！！），其实我们也可以用外部的比如element-plus、ant design、arco design这种，哈哈，小知识get，居然可以用友商开源的组件库。打包工具这个没仔细问，但是我是真的webpack一生黑，每次ci一下都得好久，看博客说因为webpack稳定，但是让我选我肯定选vite。
后端
-
语言和框架
为啥用python语言这个也让我很纠结，因为公司主力是Java，再加上我主要方向还是Java对这个也有一定的好感度。后来leader给出的解释是因为我们这个不会涉及到复杂的业务逻辑，使用python可以增加开发效率，Java的话开发效率有点慢（我觉着用mp写CRUD也挺快的啊），框架就没问，但是一共就两个，第一个Django、第二个Flask，选用flask应该是更轻量的原因吧。
-
ORM框架和MySQL
这个peewee是全自动ORM框架，类似于mp，这个当时聊到说我leader去看了github的issues区看到peewee的作者坚持不给这个框架加上自动校验参数类型这个功能，因为作者是老古董坚持认为需要类型就不要写python哈哈，啥时候我能对技术有这么高的执念，真的很喜欢这种geek范。
还有一次聊天时候因为我看到提交历史我leader怎么之前周六周日天天commit，我就问了句都不休息的吗哈哈，然后聊到因为我们这个项目新开的时候当时有时间限制，如果在指定日期之前没有搭建出新项目框架就只能去维护老平台的Go的代码了（确实维护老平台跟开一个新项目开发体验不是一个量级的~），然后我leader周六周日在家commit，时间紧任务重这个ORM框架就没有太深入调研，准备开新项目时候把这个换掉。
MySQL就不用说了，使用率接近100%，其实公司也有一些自研的数据库，这里为了脱敏就不过多阐述了
-
airflow、kafka和gRPC
airflow就是一个流程编排引擎嘛，最近写一个需求的时候才用到，但是中台系统应该都会用到这种技术，以前在组件库天天看到有这个流程，当时还好奇这玩意儿的应用场景，今天我就看到了，选择的原因就是apache 顶级项目知名度高有保障。（我猜的）
kafka是处理平台大数据量的消息队列，跟这个场景完美契合了只能说。
grpc是远程调一些外部系统的接口的，那些外部系统是用Go写的，当然有些其他RPC也能调，但是我一个没用过Go的都知道这个RPC，知名度应该是稳稳的
还有其他的比如clickhouse自己不太了解这里我就不班门弄斧了
总结
当然一次聊天肯定不能囊括所有项目，技术选型要考虑的因素也不止上面说的，还有成本、可维护性、合规性等等等等
最后发现其实之前在B站学习的技术是完完全全可以应用在实际的工程项目中的，但是你涉猎的内容需要足够的广泛，比如虽然我主要是Java，但是我前端Vue和React都写，Python平时也写一些爬虫，常见的中间件也是有了解的。在公司里面往往是先有这个场景，然后应用技术去解决这个问题，其实越写到后面越可以发现，语言，框架，技术都是可以变的，唯一不变的是业务思想。
就比如我们在考试的时候，你需要纠结是苹果计算器还是安卓计算器好用吗（手动doge），我们要做的最关键问题是想出如何解决这道问题的步骤，然后使用一个趁手的计算器去实现它。
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