hexagonal-architecture

Hexagonal architecture, or ports-and-adapters, keeps business logic independent from frameworks and infrastructure by ensuring the core domain depends only on abstract ports, while adapters implement concrete I/O and persistence details.

Define clear inbound and outbound ports to model use cases and dependencies, implement pure orchestration in use cases with ports injected at the edges, and wire a single composition root to bind adapters to ports.

Yes, hexagonal architecture applies to multi-language services across TypeScript, Java, Kotlin, and Go, enabling use-case orchestration with clear boundaries and interchangeable adapters for each language ecosystem.

Wire a single composition root to bind adapters to ports. This approach enables testable architectures by defining inbound and outbound ports, domain models, and adapter implementations with explicit wiring and tests.

Hexagonal architecture adds structural overhead through defining inbound and outbound ports, a composition root, domain models, and adapter implementations with explicit wiring and tests, making it excessive for simple or prototype-level services.

Your domain logic lacks decoupled boundaries. Hexagonal architecture solves this by ensuring the core domain depends only on abstract ports, while adapters implement concrete I/O and infrastructure details independently.