Questions tagged [n-tier]

Both classes below implement the same interface and are in fact intended to be interchangeable one for the other. Why is the second one not referred to as a "client" in the literature? There are many references to service layers, repositories,…

I have a 3-tiered web application with a web view layer, a business logic layer, and a database persistence layer. I am adding a feature that populates a history table with records if and only if the element being saved has changed (it compares the…