clean-architecture

Clean architecture structures software into distinct layers—Entities, Use Cases, Interface Adapters, and Frameworks & Drivers—to ensure maintainable, testable systems. It enforces strict dependency rules, keeping inner layers independent of outer frameworks and achieving stable abstractions.

To isolate domain logic, implement strict inward dependency flow where outer layers like Frameworks & Drivers depend on inner Use Cases and Entities, never the reverse. This decoupling ensures your core business rules remain independent of external tools and frameworks.

Yes, clean architecture pairs effectively with domain-driven design and dependency injection. The layered structure isolates domain entities and use cases, while dependency injection facilitates the inward flow of dependencies required to maintain decoupled, testable systems.

Use clean architecture when building resilient, scalable software systems that require high testability and long-term maintainability. It is ideal for complex applications where isolating use cases and protecting domain entities from framework changes is critical for architectural soundness.

To separate use cases and entities during refactoring, isolate your core business rules into the innermost entity layer, encapsulate application-specific business rules into use cases, and ensure all dependencies point inward toward these stable abstractions, away from external interfaces.