ddd-architecture

Structure a Spring service with clean domain boundaries by mapping each service to its own bounded context and separating domain models from infrastructure using mappers for persistence translation.

No, you cannot keep JPA annotations in the domain layer when applying DDD in Java. The domain layer must remain pure, requiring mappers to translate between domain models and persistence entities.

The best way to separate repository interfaces and implementations in DDD is to define interfaces within the domain layer and place their concrete implementations in the infrastructure layer.

Manage aggregate boundaries and value objects in a Java DDD architecture by explicitly defining aggregate roots, using value objects for IDs, and encapsulating models within bounded contexts to ensure consistent modeling rules.

Yes, this DDD architecture approach works explicitly for single-service module design, guiding internal layer separation between presentation, application, domain, and infrastructure layers to isolate infrastructure dependencies.

You should use mappers to translate between domain models and persistence entities whenever infrastructure dependencies must be isolated, ensuring the domain layer contains no persistence annotations like JPA.