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 and effective collaboration with domain experts
• Differentiating between core, supporting, and generic subdomains

Strategic Design and Bounded Contexts

• Establishing bounded contexts and defining their specific responsibilities
• Utilizing context mapping and standard integration patterns
• Addressing team structures, organizational boundaries, and data ownership issues

Tactical Patterns — The Building Blocks of the Domain Model

• Managing entity identity
• Leveraging value objects and ensuring immutability
• Defining aggregates and their transaction boundaries

Domain Services, Repositories, and Factories

• Determining when to employ domain services versus application services
• Exploring repository patterns and associated persistence considerations
• Using factory patterns to manage the creation of complex objects

Modeling Complex Behavior and Invariants

• Designing invariants and enforcing critical business rules
• Applying event-driven modeling and handling domain events
• Implementing consistency models, including eventual consistency and sagas

Integrating DDD with Architecture and Engineering Practices

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

Adopting DDD in Teams and Organizations

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

Summary and Next Steps