James Duong created ARROW-10106:
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Summary: [FlightRPC][Java] Expose onIsReady() callback on
OutboundStreamListener
Key: ARROW-10106
URL: https://issues.apache.org/jira/browse/ARROW-10106
Project: Apache Arrow
Issue Type: Improvement
Components: FlightRPC, Java
Reporter: James Duong
OutboundStreamListener has a method isReady() that FlightProducers need to poll
during implementations of getStream() to avoid buffering too much data.
An enhancement would be to allow setting a callback to run (for example,
notifying a CountdownLatch) so that FlightProducer implementations don't need
to busy wait.
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