[GitHub] [arrow] lidavidm commented on issue #12974: [Python][flight] How to log the GeneratorStream duration

[GitBox <gi...@apache.org>]

lidavidm commented on issue #12974:
URL: https://github.com/apache/arrow/issues/12974#issuecomment-1108490825

   Do the timing in the generator itself, or use middleware, something like
   
   ```python
   class TimingServerMiddleware(flight.ServerMiddleware):
       def __init__(self, start):
           self.start = start
           
       def call_completed(self, exception):
           print("Duration:", time.monotonic() - self.start)
   
   class TimingServerMiddlewareFactory(flight.ServerMiddlewareFactory):
       def start_call(self, info, headers):
           return TimingServerMiddleware(time.monotonic())
   
   server = Server(..., middlware={"timing": TimingServerMiddlewareFactory()})
   ```


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