Arquitectura Hexagonal (Backend)

To decouple domain logic in a NestJS backend, implement the Hexagonal Architecture pattern using ports and adapters. This isolates core business logic from external concerns like databases, enforcing dependency inversion and ensuring long-term maintainability.

The best way to structure complex enterprise backends for high testability is using Hexagonal Architecture. It protects core business logic from technological changes, allowing you to unit test domain rules without complex infrastructure mocks.

Hexagonal architecture works exceptionally well with Domain-Driven Design. It aligns perfectly by isolating intricate business logic into a domain-centric core, shielding it from infrastructure frameworks and enforcing inward-pointing dependencies.

Yes, you can easily swap databases using ports and adapters. This architecture makes your application technology agnostic by utilizing interfaces for ports and concrete implementations for adapters, allowing seamless infrastructure transitions.

You should use hexagonal architecture for backend development when managing complex enterprise systems that require high testability and long-term maintainability. It solves the problem of isolating intricate business logic from external framework dependencies.

Use dependency inversion in backend development to enforce inward-pointing dependencies. This pattern isolates your core domain logic from infrastructure concerns, making your system technology agnostic and significantly easier to maintain over time.