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27

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1

What characteristics do service classes have in terms of accessibility from other layers [clients], threading, performance, testability, extensibility and maintainability ?

A: 

Far too many questions here. My article here does address some of them.

I'd suggest that you take one of your questions, read around the sibject a bit and then ask specific clarifying questions here.

djna
@djna thats a very good article, cleared my concepts about services. I think I wanted to find the similar information.
Snake