lct45 commented on a change in pull request #9039:
URL: https://github.com/apache/kafka/pull/9039#discussion_r463026843
##########
File path:
streams/src/main/java/org/apache/kafka/streams/kstream/internals/CogroupedStreamAggregateBuilder.java
##########
@@ -132,16 +135,19 @@
final boolean stateCreated,
final StoreBuilder<?> storeBuilder,
final Windows<W> windows,
+
final SlidingWindows slidingWindows,
final SessionWindows sessionWindows,
final Merger<? super K, VOut> sessionMerger) {
final ProcessorSupplier<K, ?> kStreamAggregate;
- if (windows == null && sessionWindows == null) {
+ if (windows == null && slidingWindows == null && sessionWindows ==
null) {
kStreamAggregate = new KStreamAggregate<>(storeBuilder.name(),
initializer, aggregator);
- } else if (windows != null && sessionWindows == null) {
+ } else if (windows != null && slidingWindows == null && sessionWindows
== null) {
kStreamAggregate = new KStreamWindowAggregate<>(windows,
storeBuilder.name(), initializer, aggregator);
- } else if (windows == null && sessionMerger != null) {
+ } else if (windows == null && slidingWindows != null && sessionWindows
== null) {
+ kStreamAggregate = new
KStreamSlidingWindowAggregate<>(slidingWindows, storeBuilder.name(),
initializer, aggregator);
+ } else if (windows == null && slidingWindows == null && sessionMerger
!= null) {
Review comment:
The original just had the check for `sessionMerger != null`, are there
scenarios where the sessionMerger would be null but the sessionWindows
wouldn't? I did think it was kind of inconsistent to check 'sessionMerger' just
that one time and check 'sessionWindows' the other times so maybe it was a
mistake
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