I'm not sure if i got the right concept.
I was told by people that
Boundary = View
Entity = Model
Control = Controller
however based on my knowledge of MVC. (fat model, thin controller)
Isn't the Boundary = Controller, Control = Model (the busienss logic) and Entity = Model (The orm classes or similar entity classes which does only crud ).
I may be wrong, please guide me!
The two are very similar. The main difference is that MVC is typically used in user interface design whereas ECB is most often used in business logic. Here's a portion of a presentation by Adam Bien, who is known for promoting ECB, that helped me understand the difference between the two.
Actually your first definition is simply correct. The meaning of words is sometimes confusing. The following link confirms and summarizes both patterns (naming ECB a variant of MVC): The Entity-Control-Boundary Pattern
Your explanation is correct. But they are not similar. MVC is for user interaction. Business rules are not bound to users directly and even not I/O devices like the internet itself. The ECB pattern is used for separating business entities from the boundary (mvc framework, ORM's). Entities are business objects, they know nothing about databases, orm's. The control is not a controller like in MVC, it can be a Command which represents a use case. Only the Control may access the business entities. Business entities are a world of their own, completely isolated from the MVC layer. It can be a business framework with patterns, principles, types and separated layers of its own, that does not wish to interact with anything related to I/O.
We can combine MVC with ECB like this:
User <-> Controller [Boundary] <-> Control (use case) [Control] <-> Business entities [Entity] <-> Other business entities [Entity]
