vvcephei commented on a change in pull request #11582:
URL: https://github.com/apache/kafka/pull/11582#discussion_r771472556
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File path: streams/src/main/java/org/apache/kafka/streams/query/QueryResult.java
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@@ -197,6 +197,18 @@ public R getResult() {
return result;
}
+ @SuppressWarnings("unchecked")
+ public <V> QueryResult<V> swapResult(final V value) {
+ if (isFailure()) {
+ return (QueryResult<V>) this;
+ } else {
+ final QueryResult<V> result = new QueryResult<>(value);
Review comment:
What's happening here is that we're turning a `QueryResult<R>` into a
`QueryResult<V>`. A concrete example (in fact the only use case) of this is in
the MeteredStore, we get back a raw result from the BytesStore and need to
deserialize it, so we need to convert the `QueryResult<byte[]>` into a
`QueryResult<Integer>` or something.
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