Hexagonal Architecture & DDD Design FAQs

Question 1

What architectural patterns does this skill support?

Accepted Answer

It primarily supports Hexagonal Architecture (Ports & Adapters), Domain-Driven Design (DDD), CQRS, and Event Sourcing patterns specifically tailored for Java Spring environments.

Question 2

How does it handle dependency management between layers?

Accepted Answer

The skill enforces 'dependencies inward' rules: the Domain layer remains pure (Java stdlib only), the Application layer depends on the Domain, and the Infrastructure layer handles external concerns like DBs and APIs.

Question 3

Can this skill generate code for state transitions?

Accepted Answer

Yes, it provides patterns for Aggregate Roots where state transitions are handled via business methods that guard invariants and register Domain Events rather than using simple setters.

Question 4

Does it include support for architectural testing?

Accepted Answer

Yes, it includes guidance on using ArchUnit to programmatically verify that your package structure and dependency rules are never violated during development.

Question 5

When is it best to use this architectural approach?

Accepted Answer

It is best for complex business logic and long-lived enterprise projects where maintainability and testing are priorities. For simple CRUD apps or quick prototypes, a simpler structure may be more efficient.

Hexagonal Architecture & DDD Design

Hexagonal Architecture & DDD Design

Key Features

Use Cases

Key Features

Use Cases