hexagonal-architecture

Hexagonal architecture defines a clean boundary between core domain logic and external systems using ports and adapters. This separation reduces coupling, ensuring your domain remains independent of infrastructure to improve testability and maintainability.

Structure your application by separating it into Domain, Application, and Adapters layers. Define ports as interfaces at the domain boundary, then implement adapters to connect external systems, ensuring dependencies always point inward toward the core.

Use hexagonal architecture when you need stable boundaries for easier testing and replacement of external systems. It is applicable for designing new apps, refactoring legacy architectures, or explaining architecture decisions to teams.

The best way to decouple core domain logic during refactoring is applying the ports and adapters pattern. It enforces dependency rules that isolate the domain and application layers from infrastructure, enabling easier testing and adaptability.

Yes, you can use hexagonal architecture to explain design decisions to teams. It specifies a clear separation of Domain, Application, and Adapters layers, making it easier to communicate boundary definitions and dependency rules.