: Ensuring that the code reflects the same terminology used by business experts (e.g., using LoanApplication instead of GenericForm ).
: An abstraction layer between the domain and the data store, allowing the domain to remain agnostic of the underlying database. Proposed Project Structure
: Implement functions like NewAggregateName to handle complex initialization and ensure the domain starts in a valid state. : Ensuring that the code reflects the same
: By isolating the business logic, you can change your database or web framework without rewriting the core domain.
Go's package system is well-suited for DDD. A common approach is to use the internal directory to prevent external exposure of domain-specific logic. Responsibility Typical Go Package Core business logic, entities, and repository interfaces. internal/domain Application Orchestrates tasks and delegates to domain objects. internal/application Infrastructure Implements repository interfaces (DB, APIs). internal/infrastructure Interfaces Entry points for the system (HTTP, CLI, gRPC). internal/interfaces Key Tactical Implementation Steps : By isolating the business logic, you can
: Focuses on "what" the system does rather than "how" it's stored, which is vital for long-term project health.
: Use Ports & Adapters (Hexagonal Architecture) alongside DDD to ensure that external technologies (like MongoDB or Postgres) do not leak into the business logic. Strategic Benefits : By isolating the business logic
: Decoupled systems allow for easier unit testing of business rules without requiring a live database.