What are the best practices for implementing hexagonal architecture?

What are the best practices for implementing hexagonal architecture?

Hexagonal architecture, also known as ports and adapters, emphasizes separation of concerns. Key practices include defining clear boundaries between the core application and external systems, using interfaces for communication, and ensuring that the core logic is independent of frameworks.

Can you explain how to structure the application layers?

Certainly! In hexagonal architecture, you typically have three main layers: the core domain layer, the application layer, and the infrastructure layer. The core domain contains business logic, the application layer handles use cases, and the infrastructure layer deals with external systems like databases and APIs.

What are some common pitfalls to avoid?

Common pitfalls include tightly coupling the core logic to specific frameworks, neglecting to define clear interfaces, and overcomplicating the architecture with unnecessary layers. It's important to keep the design simple and focused on the business needs.

How do I test components in hexagonal architecture?

Testing in hexagonal architecture can be done by isolating the core logic from external dependencies. You can use mocks or stubs for the adapters and focus on unit tests for the core domain logic, ensuring that each component behaves as expected.