Difference between a Factory, Provider and a Service?

oop design-patterns repository-pattern
mrblah picture mrblah · Dec 4, 2009 · Viewed 43.6k times · Source

What is the difference between the terms Factory, Provider and Service?

Just getting into NHibernate and its Repository pattern (POCO classes, etc).

Answer

Matt Briggs picture Matt Briggs · Dec 4, 2009

Factory: Assembles classes, either by composing a bunch of bits together, or choosing type based on some kind of context

Provider: Provider is something microsoft "invented" (basically an abstract factory pattern) that is a way of doing a factory of factories, or having a common factory interface which allows factories to be swappable. It is used all over in the MS web stack as a way to keep components configurable.

Service: A service is a group of related functionality. Think of it as if you are splitting your architecture horizontally, you have a "Business Logic" layer, if you split that vertically you will have services.

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