StefanRRichter commented on a change in pull request #7188: [FLINK-10473][State
TTL] TTL state incremental cleanup for heap backend
URL: https://github.com/apache/flink/pull/7188#discussion_r246428260
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/state/KeyedStateBackend.java
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@@ -106,4 +106,23 @@
@Override
void dispose();
+
+ /** State backend will call {@link KeyChangeListener#keyChanged} when
key context changes if supported. */
+ default void registerKeyChangeListener(KeyChangeListener<K> listener) {
Review comment:
Again, I would suggest not to use `default` methods
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