damccorm commented on code in PR #23302:
URL: https://github.com/apache/beam/pull/23302#discussion_r975406751
##########
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/PeriodicSequence.java:
##########
@@ -178,9 +182,22 @@ public RestrictionTracker<OffsetRange, Long>
newTracker(@Restriction OffsetRange
return new OutputRangeTracker(restriction);
}
+ @GetInitialWatermarkEstimatorState
+ public Instant getInitialWatermarkState() {
+ return BoundedWindow.TIMESTAMP_MIN_VALUE;
+ }
+
+ @NewWatermarkEstimator
+ public WatermarkEstimator<Instant> newWatermarkEstimator(
+ @WatermarkEstimatorState Instant state) {
+
+ return new WatermarkEstimators.Manual(state);
Review Comment:
```suggestion
return new WatermarkEstimators.Manual(state);
```
##########
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/PeriodicSequence.java:
##########
@@ -178,9 +182,22 @@ public RestrictionTracker<OffsetRange, Long>
newTracker(@Restriction OffsetRange
return new OutputRangeTracker(restriction);
}
+ @GetInitialWatermarkEstimatorState
Review Comment:
Non-blocking for this PR, but I noticed above that the restriction is always
Bounded - should we set it to unbounded if the endTimestamp is omitted (set to
`BoundedWindow.TIMESTAMP_MAX_VALUE`)?
##########
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/PeriodicSequence.java:
##########
@@ -178,9 +182,22 @@ public RestrictionTracker<OffsetRange, Long>
newTracker(@Restriction OffsetRange
return new OutputRangeTracker(restriction);
}
+ @GetInitialWatermarkEstimatorState
+ public Instant getInitialWatermarkState() {
+ return BoundedWindow.TIMESTAMP_MIN_VALUE;
Review Comment:
Should we use the restriction's minimum value here? (or maybe slightly less
than that to allow the first element to be emitted)
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