Domain-Driven Design: Concepts and Practices for Senior Developers Training Course

Introduction to Domain-Driven Design

• Foundational principles and the rationale for DDD.
• The role of ubiquitous language and collaboration with domain experts.
• Differentiating between core, supporting, and generic subdomains.

Strategic Design and Bounded Contexts

• Establishing bounded contexts and defining their specific responsibilities.
• Context mapping and various integration patterns.
• Managing team structures, organisational boundaries, and data ownership.

Tactical Patterns — The Core Elements of the Domain Model

• Entities and the management of identity.
• Value objects and the principle of immutability.
• Aggregates and the definition of transaction boundaries.

Domain Services, Repositories, and Factories

• Determining when to utilise domain services versus application services.
• Repository patterns and considerations for persistence.
• Factory patterns for the creation of complex objects.

Modelling Complex Behaviour and Invariants

• Designing invariants and enforcing business rules.
• Event-driven modelling and the use of domain events.
• Consistency models, including eventual consistency and sagas.

Aligning DDD with Architectural and Engineering Practices

• Harmonising DDD with microservices and modular monolith architectures.
• API design, anti-corruption layers, and integration strategies.
• Testing domain logic through unit tests, integration tests, and contract tests.

Implementing DDD in Teams and Organisations

• Conducting domain discovery workshops and Event Storming sessions.
• Establishing and maintaining a ubiquitous language across teams.
• Evaluating success and iterating on the domain model.

Summary and Recommended Next Steps