Domain-Driven Design (DDD)

Domain-Driven Design (DDD) was invented and popularized by Eric Evans, a software engineer and author. Eric Evans introduced the concept of DDD in his book titled “Domain-Driven Design: Tackling Complexity in the Heart of Software,” first published in 2003. The book presents a comprehensive methodology for building software systems that are closely aligned with the problem domain and emphasizes effective collaboration between domain experts and developers. Since its introduction, DDD has gained widespread recognition and has become a popular approach in software development for tackling complex domains and creating well-designed, maintainable systems.

What is Domain-Driven Design?

Domain-Driven Design (DDD) is an approach to software development that focuses on building complex software systems based on a deep understanding of the underlying business domain. It aims to align the software design with the real-world problem domain, emphasizing effective collaboration between domain experts and technical teams.

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Domain Driven design example

Here’s an example of a Java microservice using Domain-Driven Design (DDD) principles. We’ll demonstrate the application of key DDD principles in each component:

Bounded Context: In this example, let’s consider the “Order Management” bounded context within the e-commerce system.

Ubiquitous Language: We establish a shared language, where terms like “Order,” “Customer,” and “Product” are used consistently by both domain experts and developers.

Domain Model:

Order Entity: Represents an order with attributes like orderId, customerId, and productIds.

Customer Entity: Represents a customer with attributes like customerId, name, and email.

Product Entity: Represents a product with attributes like productId, name, and price.

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