clean-architecture

Clean architecture organizes software into Domain, Application, Infrastructure, and Frameworks layers with strict dependency rules. This approach enforces layer boundaries, keeping business logic independent from frameworks and databases for highly testable, maintainable code.

Clean architecture enforces the Dependency Rule, ensuring inner layers like Domain remain completely independent of outer Infrastructure and Frameworks layers. Standard layered architecture often allows dependencies to cross layers freely, risking tight coupling between business logic and external systems.

Yes, applying SOLID principles and domain-driven design works across multiple languages. This approach provides language-specific examples for Python, TypeScript, C#, and Rust, detailing concrete patterns for entities, use cases, and repositories in each environment.

Business logic belongs in the Domain layer, while use cases belong in the Application layer. This separation ensures that core application rules remain isolated from Infrastructure and Frameworks layers, making the entire system scalable and independently testable.

Testing in clean architecture targets each layer independently by mocking repository interfaces and external dependencies. Because the Dependency Rule isolates the Domain and Application layers from frameworks, you can thoroughly test core business logic and use cases without requiring a database.

Avoid clean architecture for small, rapid prototypes where strict layer boundaries and separate entities, use cases, and repositories introduce unnecessary complexity. It is best suited for complex, long-term projects requiring highly maintainable and independently testable software.