Clean Architecture & Hexagonal Patterns FAQs

Question 1

What is the primary benefit of using the Architecture skill?

Accepted Answer

It ensures your business logic (Domain) is completely decoupled from external frameworks and databases, making the core code significantly easier to test, maintain, and evolve over time.

Question 2

How does the dependency rule work in this architecture?

Accepted Answer

Dependencies always point inward. The Infrastructure layer depends on the Application layer, and the Application layer depends on the Domain. The Domain layer depends on nothing, ensuring it remains pure.

Question 3

What is a 'Rich Entity' in this context?

Accepted Answer

A Rich Entity is an object that contains both data and the business logic (behavior) associated with that data, rather than being a simple data container with external utility functions.

Question 4

Can I use this with different ORMs like Prisma or TypeORM?

Accepted Answer

Yes. Because the Domain layer defines Repository Interfaces and the Infrastructure layer handles the implementation, you can swap ORMs or databases without touching your core business logic.

Question 5

Why does the implementation order start with the Domain?

Accepted Answer

Because all other layers depend on the Domain. By defining entities and repository interfaces first, you create a stable foundation that doesn't rely on implementation details like databases.

Clean Architecture & Hexagonal Patterns

Key Features

Use Cases

Clean Architecture & Hexagonal Patterns

Key Features

Use Cases