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I would consider a class representing a JSON response to be a Data Contract. Keeping it separate from your DTOs and Domain Objects also keeps the clients consuming your service decoupled from the rest of your system.


5

Umm, no? You seem to be missing fairly significant distinctions! The single responsibility principle doesn't encapsulate anything. It does not de-duplicate any behaviors/code/logic. All it says is that a class should do one thing. You can still have two classes that do the same thing. The principle is totally fine with that. The single source of truth ...


6

They're two different principles. Pretty much the only thing they have in common is the word "single." Single Source of Truth is the end result of the process of normalizing a database. Every piece of entity information is stored once, and only once. Single Source of Truth explains why we put Customers in one table, and Products in another. By ...



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