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

Introduction to Domain-Driven Design

• The foundational principles and driving forces 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 delineating their specific responsibilities.
• Mapping contexts and selecting appropriate integration patterns.
• Navigating team structures, organizational boundaries, and data ownership.

Tactical Patterns — The Building Blocks of the Domain Model

• Managing entities and their identity.
• Utilizing value objects and ensuring immutability.
• Defining aggregates and establishing transaction boundaries.

Domain Services, Repositories, and Factories

• Determining when to employ domain services versus application services.
• Applying repository patterns and considering persistence strategies.
• Using factory patterns for the creation of complex objects.

Modeling Complex Behavior and Invariants

• Designing invariants to enforce critical business rules.
• Implementing event-driven modeling and domain events.
• Exploring consistency models, including eventual consistency and sagas.

Integrating DDD with Architecture and Engineering Practices

• Aligning DDD strategies with microservices and modular monoliths.
• Designing APIs, implementing anti-corruption layers, and planning 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.
• Establishing and maintaining a ubiquitous language across multiple teams.
• Measuring success metrics and iterating on the domain model.

Summary and Next Steps