Domain-Driven Design (DDD)

Engineers are often not the experts in business domains. Yet, they’re responsible for building complex applications that represent real-world domains. Traditionally, software architectures often struggle to express the intricacies and subtlety of business domains effectively, leading to systems that are challenging to understand, maintain, and evolve. This is where domain-driven design (DDD) is brought into play.

In Chapter 7, we covered three architectural styles around the concept of having a dedicated layer to host business logic within an application. DDD aims to help engineers identify business behaviors that belong to the corresponding domain and the boundaries around it so that they can be implemented in the Core, Domain, or Use Case layer of an application.

This chapter explores the powerful software design approach of DDD, which centers around the business domain in the software design process. It focuses on capturing and expressing...