Domain-Driven Design as a Software Design Approach
🔍 Definition — Domain-Driven Design (DDD) is a software design approach that focuses on modeling software to align with the business domain, using input from domain experts.
📚 Origin — The concept was introduced by Eric Evans in his 2003 book ‘Domain-Driven Design: Tackling Complexity in the Heart of Software’.
🗣️ Ubiquitous Language — DDD emphasizes the use of a common language shared by developers and domain experts to ensure clear communication and accurate representation of the domain.
📐 Bounded Contexts — DDD divides a large system into bounded contexts, each with its own model, to manage complexity and maintain clarity.
🤝 Collaboration — It involves close collaboration between technical and domain experts to iteratively refine a conceptual model that addresses specific domain problems.
Key Concepts
🏢 Domain — Refers to the specific business area or problem that the software system aims to address, such as banking or healthcare.
🗺️ Bounded Contexts — These are specific areas within a problem domain where a particular model or language is consistently used, helping to manage complexity.
🔄 Domain Events — Significant business events that trigger changes within the domain, used to communicate changes between different parts of the domain.
🔗 Aggregates — Clusters of domain objects treated as a single unit for data consistency, with one root entity known as the Aggregate Root.
📚 Ubiquitous Language — A shared vocabulary used consistently by all stakeholders to capture relevant domain knowledge and ensure clear communication.
Strategic Design
🗺️ Context Mapping — Defines relationships and interactions between different bounded contexts, ensuring effective communication and integration.
🔄 Shared Kernel — A strategic pattern identifying common areas between contexts, allowing collaboration while maintaining distinct models.
🛡️ Anti-Corruption Layer — Protects the system from external influences by acting as a translation layer between different models or languages.
📐 Strategic Patterns — Guidelines for organizing software architecture in alignment with the problem domain, addressing high-level concerns.
🔍 Focus — Strategic design focuses on defining the overall architecture and structure of a software system to align with the problem domain.
Tactical Design Patterns
🔍 Entity — A domain object with a distinct identity and lifecycle, characterized by unique identifiers and mutable state.
💼 Value Object — Represents a value that is conceptually unchangeable, lacking a unique identity, and used to describe attributes of entities.
🔗 Aggregate — A cluster of domain objects treated as a single unit for data consistency, with one entity as the aggregate root.
📦 Repository — Separates data access logic from the domain model, providing a consistent interface for querying and storing domain objects.
🔄 Domain Events — Represent significant business events that trigger transactions and changes within the domain.
Originally published at https://dev.to on December 16, 2024.
