Github user chenqin commented on the issue:
https://github.com/apache/flink/pull/2982
@aljoscha Looks good to me ð
I briefly looked at your git branch, a minor comment would be adding
comments to `sideOutputLateData` so user get better idea when they opt-in to
late arriving event stream.
Initial late arriving event is decided by comparing watermark & eventTime,
do you think there is a need to allow user pass a kinda `Evaluator` and enable
user sideOutput any kind of sideOutputs?
`window.sideOutput(OutputTag<IN>, Evaluator)`
`interface Evaluator{ MergedWindows, key, watermark}`
- Regarding `split` `select`, I think there is a chance of consolidate
select and build upon `OutputTag`, but might be out of this PR's scope.
- Regarding to `WindowStream`, I am a bit confused to figure out if I use
`allowedlateness` and `sideOutputLateData` at same time.
Thanks,
Chen
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