lukecwik commented on a change in pull request #11454:
URL: https://github.com/apache/beam/pull/11454#discussion_r414101722
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File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/ByteKeyRangeTracker.java
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@@ -64,31 +64,56 @@ public ByteKeyRange currentRestriction() {
@Override
public SplitResult<ByteKeyRange> trySplit(double fractionOfRemainder) {
- // TODO(BEAM-8871): Add support for splitting off a fixed amount of work
for this restriction
- // instead of only supporting checkpointing.
+ // No split on an empty range.
+ if (NO_KEYS.equals(range)) {
+ return null;
+ }
+ // There is no more remaining work after the entire range has been claimed.
+ if (lastAttemptedKey != null && lastAttemptedKey.isEmpty()) {
+ return null;
+ }
- // If we haven't done any work, we should return the original range we
were processing
- // as the checkpoint.
- if (lastAttemptedKey == null) {
- ByteKeyRange rval = range;
- // We update our current range to an interval that contains no elements.
- range = NO_KEYS;
- return SplitResult.of(range, rval);
+ ByteKey startKey = (lastAttemptedKey == null) ? range.getStartKey() :
next(lastAttemptedKey);
+ ByteKey endKey = range.getEndKey();
Review comment:
I see. Thanks
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