steveloughran commented on pull request #2323:
URL: https://github.com/apache/hadoop/pull/2323#issuecomment-700777072


   Update: you will get the ability to wrap a Callable, CallableRaisingIOE or 
functionRaisingIOE with a duration tracking, which then returns a new instance 
of the same
   
   ```java
   submit(unboundedThreadPool,
             trackDurationOfCallable(
                 listingContext.getDurationTrackerFactory(),
                 OBJECT_LIST_REQUEST,
                 () -> listObjects(request)));
   ```
   
   When there's a failure we update the failure count, move timings into the 
failures section. Attempts are counted for both, so success == attempts - 
failures.


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