hexagonal-architecture-builder

Hexagonal architecture, or ports and adapters, isolates core domain logic from external concerns like databases or UIs by defining interfaces (ports) and implementations (adapters), ensuring application modularity and testability.

To design application core logic using ports and adapters, define the central business rules and ports for external interactions, then implement adapters for specific technologies based on your target stack and non-functional requirements.

Yes, you can refactor existing systems using hexagonal architecture to improve modularity and testability by restructuring the codebase to isolate business logic into an application core surrounded by ports and adapters.

To define application architecture using the hexagonal pattern, you need to provide a clear problem statement, non-functional requirements, and target stack specifications to correctly establish the core domain and adapter implementations.

Hexagonal architecture may add unnecessary complexity for simple applications or prototypes lacking strict non-functional requirements, as its strict separation of ports and adapters is designed for maintainability in complex domain-driven design projects.