ddd-clean-architecture

Clean architecture is a software design pattern enforcing strict layer separation where dependencies always point inward. The dependency rule dictates that outer layers like interface adapters can depend on inner layers, but inner entities and use cases never depend on outer mechanisms.

To structure an application using clean architecture, you separate code into distinct layers: Entities for core business rules, Use Cases for application logic, and Interface Adapters for conversions. This ensures a maintainable and testable codebase.

You should use clean architecture when designing a new, complex application that requires robust scalability and maintainability. It is ideal for projects where separating business logic from infrastructure and keeping the codebase highly testable are primary concerns.

Yes, understanding software architecture, design patterns, and domain-driven design concepts is required. Clean architecture frequently integrates domain-driven design principles to properly model complex business domains within the inner entity layers.

The best way to separate layers is by enforcing the dependency rule, assigning specific responsibilities to each layer. Entities hold enterprise rules, use cases handle application workflows, and interface adapters manage data conversion between layers.