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

Introduction to Domain-Driven Design

• Core principles and the rationale 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 clarifying their respective responsibilities.
• Developing context maps and selecting appropriate integration patterns.
• Navigating team structures, organizational boundaries, and data ownership.

Tactical Patterns — The Building Blocks of the Domain Model

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

Domain Services, Repositories, and Factories

• Determining when to utilize domain services versus application services.
• Repository patterns and key considerations for persistence.
• Factory patterns for managing complex object instantiation.

Modeling Complex Behavior and Invariants

• Designing invariants and enforcing critical business rules.
• Event-driven modeling and the role 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 tests, integration tests, and contract tests.

Adopting DDD in Teams and Organizations

• Conducting domain discovery workshops and Event Storming sessions.
• Creating and sustaining a ubiquitous language across multiple teams.
• Measuring success and iteratively refining the domain model.

Summary and Next Steps