@Experimental public interface ResponseCollector<T>
|Modifier and Type||Method and Description|
Called when a response is received, or when a target node becomes unavailable.
When a target node leaves the cluster, this method is called with a
Should return a non-
null result if the request should complete with that value, or
if it should wait for more responses.
If the method throws an exception, the request will be completed with that exception.
If the last response is received and
addResponse() still returns
finish() will also be called to obtain a result.
addResponse() will *not* be called concurrently from multiple threads,
and the request will not be completed while
addResponse() is running.
nullfor the last response.
finish() finishes normally, the request will complete with its return value
finish() throws an exception, the request will complete exceptionally with that exception,
wrapped in a
CompletionException (unless the exception is already a
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