O que é Clean Architecture?

Clean Architecture, like Onion and Hexagonal architectures, aims to isolate business rules from external factors. It achieves this by defining distinct layers, protecting the application's core. The fundamental principle is that dependencies always flow from the outside inwards. The deepest layer, Entities, encapsulates the core business logic. Use Cases, or Interactors, implement these business rules and manage entities, bridging the core with external layers. Interface Adapters are responsible for translating data between the external world and the business logic. The outermost layer, Frameworks and Drivers, consists of external devices interacting with the application. This layer should be replaceable without affecting internal layers. While specific layer names might vary, the logical structure and adherence to the architecture are paramount. The key takeaway is the separation of concerns and dependency direction.