@Override
public DynamicSplitResult requestDynamicSplit(DynamicSplitRequest splitRequest) {
checkNotNull(splitRequest);
ApproximateSplitRequest splitProgress = splitRequestToApproximateSplitRequest(splitRequest);
com.google.api.services.dataflow.model.Position cloudPosition = splitProgress.getPosition();
if (cloudPosition == null) {
LOG.warn("Concat only supports split at a Position. Requested: {}", splitRequest);
return null;
}
ConcatPosition concatPosition = cloudPosition.getConcatPosition();
if (concatPosition == null) {
LOG.warn(
"ConcatReader only supports split at a ConcatPosition. Requested: {}", cloudPosition);
return null;
}
if (rangeTracker.trySplitAtPosition(concatPosition.getIndex())) {
com.google.api.services.dataflow.model.Position positionToSplit =
new com.google.api.services.dataflow.model.Position();
positionToSplit.setConcatPosition(
new ConcatPosition().setIndex((int) rangeTracker.getStopPosition().longValue()));
return new DynamicSplitResultWithPosition(cloudPositionToReaderPosition(positionToSplit));
} else {
LOG.debug("Could not perform the dynamic split request " + splitRequest);
return null;
}
}
@Override
public double getRemainingParallelism() {
return tracker.getStopPosition() - nextIndex;
}