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

Introduction to Domain-Driven Design

• Core principles and the rationale behind DDD
• The role of ubiquitous language in collaborating with domain experts
• Differentiating between core, supporting, and generic subdomains

Strategic Design and Bounded Contexts

• Establishing bounded contexts and defining their responsibilities
• Context mapping and integration strategies
• Managing teams, organisational boundaries, and data ownership

Tactical Patterns — Building Blocks of the Domain Model

• Entities and managing identity
• Value objects and the principle of immutability
• Aggregates and defining transaction boundaries

Domain Services, Repositories, and Factories

• Determining when to use domain services versus application services
• Repository patterns and considerations for persistence
• Utilising factory patterns for complex object creation

Modelling Complex Behaviour and Invariants

• Designing invariants to enforce business rules
• Event-driven modelling and the use of domain events
• Consistency models: eventual consistency and sagas

Integrating DDD with Architecture and Engineering Practices

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

Adopting DDD in Teams and Organisations

• Facilitating domain discovery workshops and Event Storming
• Developing and maintaining a ubiquitous language across teams
• Measuring success and iteratively refining the domain model

Summary and Next Steps