Domain Instrumentation: Keeping Use Cases Expressive
Instrumentation is essential in any application: logs for debugging, metrics for monitoring, and traces to understand execution flow. But when this instrumentation is mixed directly into use cases, the code becomes difficult to read, maintain, and especially, to test. In this post, I’ll explore a pattern I regularly apply: abstracting instrumentation behind domain-specific interfaces, keeping use cases expressive and focused on business logic. Additionally, it helps me postpone infrastructure decisions and dramatically improves test quality. ...