mjsax commented on code in PR #13496:
URL: https://github.com/apache/kafka/pull/13496#discussion_r1158792312
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KTableValueGetter.java:
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@@ -25,5 +25,21 @@
ValueAndTimestamp<V> get(K key);
+ /**
+ * Returns the latest record version, associated with the provided key,
with timestamp
+ * not exceeding the provided timestamp bound. This method may only be
called if
+ * {@link #isVersioned()} is true.
+ */
+ default ValueAndTimestamp<V> get(K key, long asOfTimestamp) {
+ throw new UnsupportedOperationException("get(key, timestamp) is only
supported for versioned stores");
+ }
+
+ /**
+ * @return whether this value getter supports multiple record versions for
the same key.
+ * If true, then {@link #get(Object, long)} must be implemented.
If not, then
+ * {@link #get(Object, long)} must not be called.
+ */
+ boolean isVersioned();
Review Comment:
As `get(key, asOfTs)` throws and exception by default, should we let
`isVersioned` return `false` by default?
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