Github user gaborhermann commented on the pull request:
https://github.com/apache/flink/pull/872#issuecomment-116671285
I'd prefer the function implementation (like `(K, Int) => Int`), but it
should stay consistent with the batch API. I don't see why the wrapping would
effect the compatibility checking of the partitioning.
Is it okay, if I change it to the function implementation in both (Scala
batch, Scala streaming) APIs? If not, then let's just stick with the
partitioner implementation in the APIs.
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