I'd like to propose creating an operator utility in com.datatorrent.lib.operatorutils to convert time into number of windows and tuples / second into tuples / window. The way in which this currently can be specified is through a property like operationWindowCount or tuplesPerWindow. This works but I've observed that this can lead to confusion. The confusion comes from the fact that the people who develop apps are not necessarily the ones who test deployment configurations and manage the apps, so they think in time not application windows. Also the default application window count and streaming window size is not common knowledge, so it's not easy to compute the conversion from windows to time. This small utility method could be reused across operators.
Any feedback? Thanks, Tim
