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

Introduction to Domain-Driven Design

• Core principles and motivations driving 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 their specific responsibilities.
• Context mapping and applicable integration patterns.
• Managing team dynamics, organizational boundaries, and data ownership.

Tactical Patterns — Fundamental Components of the Domain Model

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

Domain Services, Repositories, and Factories

• Distinguishing when to use domain services versus application services.
• Repository patterns and considerations for data persistence.
• Utilizing factory patterns for complex object instantiation.

Modeling Complex Behavior and Invariants

• Designing invariants and enforcing business rules.
• Event-driven modeling and the use of domain events.
• Consistency models: understanding eventual consistency and sagas.

Integrating DDD with Architecture and Engineering Practices

• Aligning DDD concepts with microservices and modular monolith architectures.
• API design, implementing anti-corruption layers, and establishing 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 maintaining a ubiquitous language across teams.
• Measuring success metrics and iterating on the domain model.

Summary and Next Steps