@Override
public Progress getProgress() {
if (currentIteratorIndex < 0) {
// Reading has not been started yet.
return null;
}
ConcatPosition concatPosition = new ConcatPosition();
concatPosition.setIndex(currentIteratorIndex);
Progress progressOfCurrentIterator = currentIterator.getProgress();
if (!(progressOfCurrentIterator instanceof DataflowReaderProgress)) {
throw new IllegalArgumentException(
"Cannot process progress "
+ progressOfCurrentIterator
+ " since ConcatReader can only handle readers that generate a progress of type "
+ "DataflowReaderProgress");
}
com.google.api.services.dataflow.model.Position positionOfCurrentIterator =
((DataflowReaderProgress) progressOfCurrentIterator).cloudProgress.getPosition();
if (positionOfCurrentIterator != null) {
concatPosition.setPosition(positionOfCurrentIterator);
}
ApproximateReportedProgress progress = new ApproximateReportedProgress();
com.google.api.services.dataflow.model.Position currentPosition =
new com.google.api.services.dataflow.model.Position();
currentPosition.setConcatPosition(concatPosition);
progress.setPosition(currentPosition);
return cloudProgressToReaderProgress(progress);
}
@Override
public Progress getProgress() {
// Currently we assume that only a record index position is reported as
// current progress. An implementer can override this method to update
// other metrics, e.g. completion percentage or remaining time.
com.google.api.services.dataflow.model.Position currentPosition =
new com.google.api.services.dataflow.model.Position();
currentPosition.setRecordIndex((long) nextIndex);
ApproximateReportedProgress progress = new ApproximateReportedProgress();
progress.setPosition(currentPosition);
return cloudProgressToReaderProgress(progress);
}