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今天我们来说一下

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领域驱动设计伪创新

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为什么互联网是重灾区

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这个我们分几个视频来讲

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那这是来自于

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以前的一个答疑

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这个同学问

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看我发的软件方法

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第八章，有一篇文章

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有一个调查

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调查什么呀

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提到几个类

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然后他就发现

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谈论DDD的

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除了tw公司的人

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还有呢，大部分是互联网公司的

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而且都会提到微服务等等

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他问的问题

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是不是互联网

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更适合用DDD

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那个调查是这样的

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就是写在软件方法那个书上

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你看过的以领域驱动设计为名的文章

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里面有几个领域类

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一般都是五个以下的

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注意

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领域类

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订单算一个

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你不能说，订单

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然后这边有个订单工厂

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那边有个订单仓储

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然后订单service，不是

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不是这样的

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就一个类叫订单

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然后周围围了一圈

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实际上就

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只有一个订单

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那么这个呢，我们要分几点来谈才行

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因为要讲的话就会扯到很多其他的问题了

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我分几点来谈

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第一个巫医特别适合治感冒

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这个就是为什么

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有些DDD实践为什么喜欢挑互联网来下嘴

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那下面就是谈互联网的一些所谓的建模经验的问题了

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包括并存不等于因果

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纳税不是盈利的原因

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最后我们再谈一谈

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什么样的人介绍的经验是可以借鉴的

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第一个，我们说一下

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为什么DDD实践喜欢挑互联网下嘴

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互联网，这里也是加引号的

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泛指一种什么

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就是说

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它功能

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很简单

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但是用的人特别多

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这两个是相辅相成的

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我们后面会提到

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那之前的话

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软件是重功能的

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就是功能很多

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但是，互联网到来之后呢

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就会带来一种什么

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功能特别少

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但是

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用的人特别多

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其中最典型的就是hotmail

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hotmail就是一个电子邮箱嘛

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对不对

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但是因为它是免费的

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所以呢，你看，1996年提出来之后

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一年半时间就有1200万的用户

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那是1996年的时代

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不是

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现在的1200万

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1996年

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然后被微软收购

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现在

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还存在呢

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对不对

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hotmail是什么

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就是一个基于web的

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电子邮件系统

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这个东西

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大把的人会做

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对不对

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而且呢，应该有现成很多代码可以抄

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问题是，你会做有啥用

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你有钱买服务器吗

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有钱去烧吗

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有钱去做广告吗

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对不对

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所以呢

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很多的开发人员，就跑到这样的公司去了

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去开发或者维护这样的系统

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这时候显然

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这里面需要剖析的领域逻辑

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是没有什么太复杂的

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即使有复杂的

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也已经被人剖析过很多遍了

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因为

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这些都是一些基础设施

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而且大把的

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可以借鉴的

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那么，对于这样的系统

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你用什么开发方法来开发

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是无所谓的

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对不对

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你用很严密的建模推导

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你拍脑袋开发，趴着开发

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躺着开发，都可以

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那既然如此

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那我

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上一个伪创新的开发方法

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也并不妨碍这个网站本身成功还是不成功

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因为这个网站成功还是失败

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要素根本就不在于

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你用什么方法开发

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或者说，这个东西会不会开发

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开发得怎么样

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其实这个都不是问题

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因为这个很简单

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所以呢，很多伪创新就盯住了

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这样的一种系统

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那不只是说领域驱动设计

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包括敏捷等等

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都是挑互联网

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喜欢挑互联网来下嘴

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以前经常有人跟我说

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我以前经常批评敏捷嘛

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然后呢

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就有人跟我说

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潘老师

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敏捷

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做别的不好说

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但是对互联网很管用

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当然管用了

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对不对

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就像这里有一杯白开水

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但是我说它不是白开水

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它是一瓶灵丹妙药

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这个药

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癌症治不了

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这个我承认

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我很诚实

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癌症是治不了的

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但是治感冒

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很管用

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你不信

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等你感冒的时候

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你把这个水给喝了

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五天之内我包你好

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好了吗

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确实好了

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为什么

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因为感冒本身，你喝白开水

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喝可乐，喝粥

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都可以

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跟那个没有关系的

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那既然如此的话

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他就

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以这个为借口

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就把白开水

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当成

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治感冒的灵药卖给别人了

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就跟巫医

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治感冒一样

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对不对

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你感冒了，好

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没关系

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你躺在供桌上

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我找英叔

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给你做法

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绕着你

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脚踏八卦阵

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绕着你走八八六十四圈

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你看，他也是有一套方法学的

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跟那个事件风暴

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通用语言这些一样的

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他也是编造了一套方法学

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好

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他做法做完之后

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他就跟那个病人说

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你回去躺几天就好了

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确实

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好了

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然后，他就把功劳都归到他的身上

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你看，我这套方法

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非常适合

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互联网，非常适合治感冒，一样的