Application Design - Layered Architecture

 Layered Architecture:

           1)      Presentation Layer - User Interface of application

           2)      Business Logic Layer – Rules of application

           3)      Data Access Layer – Responsible for connecting to data source and interacting with data that is stored in that location.

e.g. database, some XML files, text files or web service.  

4)   Utility /Components Layer – Mechanism of caching, logging errors, reading from configuration files.

Create independent project called Component layer   

           a)      Presentation layer – Web

           b)      Business layer – entities, business logic, components, interfaces

           c)      Data Layer – Entities, Data Access

           d)      Components Layer – Caching, logging, Configuration