Implementing cross-boundary instrumentation
Let’s translate our understanding of Clean Architecture’s observability benefits into practical implementation. Modern web frameworks such as Flask provide their own logging infrastructure, which can tempt developers into tightly coupling business operations with framework-specific logging. We’ll see how to work effectively with these framework mechanisms while keeping our core business logic framework-independent. Through a careful implementation of structured logging and request tracing, we’ll demonstrate patterns that maintain Clean Architecture’s boundaries while delivering comprehensive system observability.
Avoiding framework coupling in logging
As we mentioned, web frameworks often provide their own logging infrastructure. Flask, for instance, encourages direct use of its application logger (app.logger):
@app.route('/tasks/new', methods=['POST'])
def create_task()...
