This guide covers best practices and guidelines for implementing interceptors in your Goa services.
Design Time Best Practices
1. Keep Interceptors Focused
Interceptors should follow the single responsibility principle. Each interceptor should handle one specific cross-cutting concern, such as logging, metrics, or authentication. This makes them:
- Easier to maintain and update independently
- Simpler to test in isolation
- More reusable across different services
- Clearer in their purpose and behavior
- Easier to compose together in different combinations
For example, instead of creating one large interceptor that handles both logging and metrics, create two separate focused interceptors that can be used together when needed. This separation of concerns leads to more maintainable and flexible code.
