You might wonder why not just put everything that is “infrastructure related” in a dedicated directory inside the Business-Module. That’s the approach often taken in many designs in the wild, but the problem with such a weak separation is that it tends to erode (and after many months you discover that a business class peeks messages in a broker). Another problem is that it’s much harder to find the boundary for unit tests (whereas with BM and IM separated, you can just assume that the public API of BM is what should be unit tested).
这一层同样有两条“平行线”，一部分团队坚持在真实的工厂、机房中进行长周期的多模态数据采集，追求数据与物理环境的绝对一致性。。业内人士推荐服务器推荐作为进阶阅读
，这一点在快连下载安装中也有详细论述
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