Clean Architecture

What is not architecture​

• Libraries​

• Frameworks​

• MVC​

• Tools . . .​

Bad vs Clean​

• Complex​

• Incoherent​

• Rigid​

• Untestable​

• Unmaintainable​

• Simple​

• Understandable​

• Flexible​

• Testable​

• Maintainable​

What is Clean Architecture​

"Architecture that is designed for the inhabitants of the architecture, not for the architect or the machine."

Focus on essential

Minimize cost

Maximize value

Essential

Detail

• Space definition

• Color

• Domain / Entities
• User cases

• Presentation
• Persistence

https://blog.cleancoder.com/uncle-bob/2012/08/13/the-clean-architecture.html​

Layers

• Levels of abstraction​

• Single-responsibility​

• Insolate roles and skills​

• Multiple Implementations​

• Varying rates of change

Pros vs Cons

• Focus on Domain/Entities
• Less coupling
• Allows Domain Driven Design 
• Business - user cases
• Easy to understand

• The change is difficult.
• Require extra effort. 
• Initial higher cost.

Exercise

User case

• Customer
• Items
• Shipping
• Membership

Customer

Membership Interface

Boom

Linio plus

Cart

Shipping

SOLID

Dependency inversion

More information

• https://blog.cleancoder.com/

• "Clean Architecture: Patterns, Practices, and Principles" by Matthew Renze on pluralsight