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

Introduction to Domain-Driven Design

• The underlying principles and motivations behind DDD.
• Establishing a ubiquitous language and fostering collaboration with domain experts.
• Differentiating between core, supporting, and generic subdomains.

Strategic Design and Bounded Contexts

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

Tactical Patterns — Core Components of the Domain Model

• Entities and identity management.
• Value objects and the concept of immutability.
• Aggregates and defining transaction boundaries.

Domain Services, Repositories, and Factories

• Determining when to utilise domain services versus application services.
• Repository patterns and considerations for persistence.
• Utilising 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.

Integrating DDD with Architecture and Engineering Practices

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

Adopting DDD in Teams and Organisations

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

Summary and Next Steps