mjsax commented on a change in pull request #11582:
URL: https://github.com/apache/kafka/pull/11582#discussion_r771733023
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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;
Review comment:
> I suppose we could throw an IllegalStateException, since the caller
probably shouldn't be even trying to "swap" the result on a failed result to
begin with, but this seems fine, too.
If there is no strict reason not to throw an `IllegalStateException`, I
would strongly advocate to throw. It not only guards against potential bugs,
but also expresses the semantics for developers (ie, us) much cleaner and makes
the code easier to read/reason about.
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