clean-architecture

Structure a NestJS backend with Clean Architecture by separating domain, application, and infrastructure layers. Define bounded contexts, enforce inward dependencies, and wire use cases to adapters for data access to ensure maintainable domain models.

Implement Hexagonal Architecture in TypeScript by defining ports for data access and implementing adapters to connect the domain to infrastructure. This isolates domain logic and promotes highly testable use cases across your application.

You need bounded contexts and domain events in NestJS when modeling complex, maintainable domain models. This approach separates large business domains into distinct logical boundaries, ensuring clear architectural limits and easier testing.

Enforce inward dependencies in a TypeScript clean architecture project by ensuring infrastructure and application layers depend on the domain layer, while the domain layer remains isolated. Declare ports for data access to maintain strict boundary separation.

Yes, you can use NestJS dependency injection to wire adapters and repositories. Define ports in the domain layer for data access, implement adapters in the infrastructure layer, and inject them into application use cases to maintain testability.

Domain logic leaks into infrastructure when inward dependencies are not enforced. Apply Hexagonal Architecture patterns by defining ports for data access and keeping rich domain models with invariants isolated in the domain layer.