Github user rbnks commented on the pull request:
https://github.com/apache/incubator-streams/pull/15#issuecomment-43766976
@mfranklin So I can see how maybe we want to change the name of
keepRunning, or we might want to have a shut off now method in the future. But
currently we only have one way to shut down the queue. And checking if 'datum
!= null' will flush all of the data out of the queue before it shuts. And
since local mode shuts down each task in upstream to downstream order, we can
know we will flush all of the data.
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