architecture-patterns

To separate domain logic from infrastructure during a monolith refactoring, apply clean architecture and port-and-adapter boundaries. This ensures dependencies flow inward and use cases import only domain interfaces, keeping core business logic framework-agnostic and testable.

The best way to design bounded contexts for new microservices is using Domain-Driven Design tactical artifacts. Document context maps and dependency rules early to keep each layer pure, prevent circular imports, and enable in-memory test doubles.

Hexagonal architecture prevents dependency leaks by enforcing port-and-adapter discipline. Use cases import only domain interfaces while infrastructure binds concrete implementations, ensuring core business logic remains framework-agnostic and allowing adapters to be swapped without touching the domain.

You need an Anti-Corruption Layer when integrating new microservices with legacy systems to prevent domain pollution. It isolates external models by translating them into your bounded context, ensuring use case and domain layers remain pure and testable.

Structure clean architecture layers for an order management service by separating domain, use case, and adapter components. Define port-and-adapter boundaries so dependencies flow inward, keeping business logic framework-agnostic and enabling in-memory test doubles for use cases.

Use cases should import only domain interfaces in clean architecture to enforce dependency rules and prevent circular imports. This port-and-adapter discipline allows infrastructure to bind concrete implementations and enables in-memory test doubles for isolated testing.