Building Domain-Driven Design (DDD)

Domain-Driven Design (DDD) is a methodology and set of practices aimed at understanding and solving complexity at the heart of software. This approach is used to design and model software based on the “domain,” or the business’s core logic and key concepts. Using a common language and dividing the system into clear contexts, DDD promotes a deep understanding of the problem space and leads to a design that accurately reflects the underlying business needs. It’s particularly valuable in complex domains, where aligning the software closely with the real-world concepts it represents is vital.

Let’s delve into DDD using a concrete example and use case. For this, we’ll consider the domain of a Healthcare Management System (HMS). Imagine we’re developing a system that manages patient records, appointments, medical treatments, billing, etc. for a healthcare provider. Here’s how we could apply DDD...