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[Java] Bound the Watch deduplication state with a timestamp cursor #39746

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Merged
Abacn merged 5 commits into from
Aug 26, 2026
Merged

[Java] Bound the Watch deduplication state with a timestamp cursor #39746

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5c603c7
[Java] Bound the Watch deduplication state with a timestamp cursor
Eliaaazzz Aug 13, 2026
7e9fced
Address review on the Watch timestamp cursor
Eliaaazzz Aug 13, 2026
f2f1173
Advance the watermark to the retention floor on empty rounds
Eliaaazzz Aug 20, 2026
3504ac7
Merge remote-tracking branch 'upstream/master' into java-watch-timest…
Eliaaazzz Aug 24, 2026
faf2708
Cover Java and Python in the Watch timestamp-cursor CHANGES entry
Eliaaazzz Aug 24, 2026
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1 change: 1 addition & 0 deletions CHANGES.md
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Expand Up @@ -69,6 +69,7 @@
## New Features / Improvements

* X feature added (Java/Python) ([#X](https://github.com/apache/beam/issues/X)).
* (Java) `Watch.growthOf` can bound its deduplication state by event time with `withTimestampCursor`, which retires an output key once the greatest emitted timestamp has moved more than the allowed lateness past it ([#18459](https://github.com/apache/beam/issues/18459)).

@Abacn Abacn Aug 21, 2026 •
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This statement applies to both Java and Python.

@Eliaaazzz Eliaaazzz Aug 26, 2026

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Done in faf2708. The entry now reads (Java/Python) and names both surfaces: Watch.growthOf(...).withTimestampCursor() in Java, and allowed_lateness in Python, which #39461 added for the existing timestamp_cursor option after the 2.76 branch cut. I also merged master in 3504ac7 to clear the CHANGES.md conflict.


## Breaking Changes

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