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

Introduction to Domain-Driven Design

• Foundational 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 assigning their respective responsibilities.
• Utilizing context mapping and various integration patterns.
• Managing team dynamics, organizational boundaries, and data ownership.

Tactical Patterns — Building Blocks of the Domain Model

• Managing entities and their identity.
• Implementing 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.
• Exploring repository patterns and persistence strategies.
• Utilizing factory patterns for the creation of complex objects.

Modeling Complex Behavior and Invariants

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

Integrating DDD with Architecture and Engineering Practices

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

Adopting DDD in Teams and Organizations

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

Summary and Next Steps