Custom Metrics in Windowed AggregateFunction

[Chirag Dewan]

Hi,
I am writing a Flink job for aggregating events in a window. 
I am trying to use the AggregateFunction implementation for this. 
Now, since WindowedStream does not allow a RichAggregateFunction for 
aggregation, I cant use the RuntimeContext to get the Metric group. 
I dont even see any other way of accessing the Metric Group in a non-rich 
function implementation?
Is there any way around here? 
Any help appreciated.
Thanks,
Chirag