alanlau28 commented on code in PR #23037:
URL: https://github.com/apache/kafka/pull/23037#discussion_r3758298165
##########
streams/src/main/java/org/apache/kafka/streams/state/internals/PlainToHeadersWindowStoreAdapter.java:
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@@ -68,6 +68,23 @@ public PlainToHeadersWindowStoreAdapter(final
WindowStore<Bytes, byte[]> store)
this.store = store;
}
+ /**
+ * Report the retention of the store being adapted. This adapter holds its
delegate in a private
+ * field rather than as a {@link WrappedStateStore}, so {@code
extractRetentionPeriod}'s unwrap
+ * walk terminates here; without this it resolves -1 and the KAFKA-13499
windowed-restore
+ * optimisation is silently skipped for every store behind the adapter.
+ */
+ @Override
+ public long retentionPeriod() {
+ StateStore current = store;
Review Comment:
Thanks @bbejeck, this makes sense. I created a static method for the
interface.
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