: Decoupled systems allow for easier unit testing of business rules without requiring a live database.
: Implement functions like NewAggregateName to handle complex initialization and ensure the domain starts in a valid state.
: Objects with a unique identity that persists over time. : Decoupled systems allow for easier unit testing
: Focuses on "what" the system does rather than "how" it's stored, which is vital for long-term project health.
: An abstraction layer between the domain and the data store, allowing the domain to remain agnostic of the underlying database. Proposed Project Structure : Focuses on "what" the system does rather
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
DDD is divided into strategic and tactical patterns. Tactical patterns are the primary focus when structuring a Go codebase. A common approach is to use the internal
: Ensuring that the code reflects the same terminology used by business experts (e.g., using LoanApplication instead of GenericForm ).