[Understanding Software Architecture Spec] Layered Architecture

Layered Architecture Topology

• Presentation Layer
  • Presentation Layer is responsible for User Interface(UI) and Backend Interface
• Business Layer
  • Business Logic Layer for each requests like fetch data from persistence layer
• Persistence Layer
  • Fetch/Create/Update data from database layer
• Database Layer

Specification

The most important part of Layered Architecture is Separation of Domains.
This architecture helps you to build effective role and responsibility models.

• Layer Separation
  • Closed Layer
    • When a request moves from top to bottom in a layer, it must go through the layer directly below without skipping any of the layers
    • Closed layers facilitate separation of layers and help isolate changes within the architecture
  • Open Layer
    • opposite of Closed Layer

Why we choose Layered Architecture

• Suitable for Small and Simple application
  • Layered Architecture is really easy to understand and start

Architecture Evaluation