hexagonal-architecture

Implement hexagonal architecture by defining ports as interfaces and adapters as implementations to isolate business logic from infrastructure, ensuring clear boundaries that drive maintainability, modularity, and easier testing across your software systems.

The ports and adapters pattern is a software design approach that separates application core logic from external concerns. You need it when struggling with tightly coupled systems, enabling dependency inversion to make your codebase modular and highly testable.

Incrementally adopt hexagonal architecture in an existing project by gradually introducing ports and adapters to decouple specific modules. This approach facilitates reorganizing your project for better scalability and testability without requiring a complete system rewrite.

Yes, hexagonal architecture works for improving software testability by enforcing dependency inversion and clear separation of concerns. It reduces tight coupling between components, allowing infrastructure adapters to be swapped or mocked effortlessly during testing.

Dependency injection and ports work together by injecting concrete adapter implementations through defined port interfaces. This system architecture strategy inverts dependencies, ensuring the business core remains isolated from external infrastructure and highly flexible.

You should avoid using the hexagonal architecture pattern for very small or simple applications where the overhead of defining ports and adapters outweighs the benefits. If your system does not require high modularity or extensive testability, simpler architectural patterns may be more appropriate.