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

Introduction to Domain-Driven Design

• Foundational principles and the motivations behind DDD
• The role of ubiquitous language and collaboration with domain experts
• Distinguishing between core, supporting, and generic subdomains

Strategic Design and Bounded Contexts

• Defining bounded contexts and clarifying their specific responsibilities
• Context mapping and common integration patterns
• Managing team structures, organizational boundaries, and data ownership

Tactical Patterns — The Building Blocks of the Domain Model

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

Domain Services, Repositories, and Factories

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

Modelling Complex Behaviour and Invariants

• Designing invariants to enforce critical 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 principles with microservices and modular monolith architectures
• API design, anti-corruption layers, and effective integration strategies
• Testing domain logic through unit, integration, and contract tests

Adopting DDD in Teams and Organizations

• Conducting 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