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I’ve written a abstract base class TCPIP sever in its own namespace/library. Currently I have the derived class (more specific TCPIP server; with DataHandler) in the .exe project of the solution.
I’m almost 100% certain this is how I will go, but part of me wants to put the derived class in the base class project. What are some good reasons for/against this?
I believe YAGNI, KISS and The Rule Of Three apply here. If you don’t have immediate plans to try to reuse the derived class, then keep it in the application namespace. If you find later there is a second project/application that can use something like your derived class then keep to your plan and use it as a “template” to create another similar derived class by cut and paste.
If you find a third occasion to do this again, then you can take a look and see if there is a reasonably useful subclass sitting in there. Don’t get distracted trying to spot reusable abstractions too early.