lukecwik commented on a change in pull request #11418: [BEAM-8872] Support
split at fraction for OffsetRangeTracker
URL: https://github.com/apache/beam/pull/11418#discussion_r408473046
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/OffsetRangeTracker.java
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@@ -49,13 +50,22 @@ public OffsetRange currentRestriction() {
@Override
public SplitResult<OffsetRange> trySplit(double fractionOfRemainder) {
- // TODO(BEAM-8872): Add support for splitting off a fixed amount of work
for this restriction
- // instead of only supporting checkpointing.
-
- checkState(
- lastClaimedOffset != null, "Can't checkpoint before any offset was
successfully claimed");
- OffsetRange res = new OffsetRange(lastClaimedOffset + 1, range.getTo());
- this.range = new OffsetRange(range.getFrom(), lastClaimedOffset + 1);
+ checkState(lastClaimedOffset != null, "Can't split before any offset was
successfully claimed");
Review comment:
We can split before any successfully claimed block by returning `[from, to)`
and updating the current range to be `[from, from)`
This makes sense in some cases where we want to handoff all the work to
someone else for the active element while this Bundle finishes other processing.
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