Overview Of Domain-driven design (DDD)

What is Domain-driven design (DDD) ?

Domain-driven design (DDD) is a software development approach that focuses on modeling the problem domain and building the software system around that model, to create more effective and maintainable software.

Key Concepts and Terminology of DDD

Domain

The specific area of knowledge or expertise that a software system is being built for, which can be a business domain or a technical domain.

Aggregate

A cluster of domain objects that can be treated as a single unit. Aggregates ensure consistency and integrity within the domain.

Ubiquitous Language

Common language and concepts for technical and non-technical teams to discuss software system domain.

Value Object

Value objects lack unique identity and are defined by attributes, representing measurable concepts within the domain.

Bounded Context

A specific boundary within which a model, language, and set of concepts are defined and applicable. Each bounded context represents a specific part of the domain.

Domain Event

An event that has occurred within the domain and is of interest to other parts of the system. Domain events represent important business activities or changes within the domain.

Pros of Domain-driven design

-Common language & understanding for better stakeholder communication. -Improves alignment with business needs & requirements. -Manages system complexity.

Cons of Domain-driven design

-Requires significant time & resources to apply. -Challenging to implement in rigid/siloed organizations. -May not be suitable for simple/well-defined domains.

When to use Domain-driven design?

DDD is used to create software that reflects the understanding of the problem domain, particularly in complex business domains where requirements are not well-defined or are subject to frequent change.