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

Introduction to Domain-Driven Design

• Core principles and the drivers behind adopting DDD.
• Building a ubiquitous language through collaboration with domain experts.
• Differentiating between core, supporting, and generic subdomains.

Strategic Design and Bounded Contexts

• Defining the scope and responsibilities of bounded contexts.
• Mapping contexts and selecting appropriate integration patterns.
• Managing organizational boundaries, team structures, and data ownership.

Tactical Patterns — Constructing the Domain Model

• Understanding entities and managing their identity.
• Utilizing value objects and enforcing immutability.
• Structuring aggregates to define transaction boundaries.

Domain Services, Repositories, and Factories

• Determining when to employ domain services versus application services.
• Applying repository patterns while considering persistence strategies.
• Using factory patterns to handle complex object creation logic.

Modeling Complex Behavior and Invariants

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

Aligning DDD with Architecture and Engineering

• Harmonizing DDD with microservices and modular monolith architectures.
• Designing APIs, implementing anti-corruption layers, and planning integrations.
• Validating domain logic through unit, integration, and contract tests.

Implementing DDD Across Teams and Organizations

• Facilitating domain discovery workshops and Event Storming sessions.
• Establishing and maintaining a shared ubiquitous language across teams.
• Evaluating outcomes and continuously refining the domain model.

Conclusion and Future Directions