hexagonal-architecture

The hexagonal architecture solves rigidity and testability challenges by decoupling core domain logic from infrastructure, ensuring your business rules remain independent of frameworks, databases, and messaging systems while enabling interchangeable adapters.

You structure clean architecture by designing pure domain models first, defining inbound and outbound ports as interfaces, and implementing adapters around them to swap technologies without touching business rules.

Yes, you can swap databases and messaging systems without rewriting business rules by implementing multiple interchangeable adapters around clearly defined outbound ports, ensuring the core domain model remains pure and independent of specific infrastructure technologies.

You wire adapters using dependency injection at startup to connect inbound and outbound ports with their respective technology implementations, enabling framework independence and allowing seamless swapping of databases or messaging systems.

Ports-and-adapters explicitly focuses on defining inbound and outbound ports to isolate the domain model, while clean architecture is a broader pattern; both achieve framework independence by decoupling core logic from infrastructure.

You should avoid hexagonal architecture when your project lacks complex domain logic or requires integrating with multiple interchangeable databases, messaging systems, or UI frameworks, as the architectural overhead outweighs the testability benefits.