Type: SystemInt32 the number of replica that should have been
(known) alive for the operation to be attempted.
aliveReplica
Type: SystemInt32 the number of replica that were know to be alive
by the coordinator of the operation.
nbRetry
Type: SystemInt32 the number of retry already performed for this
operation.
Return Value
Type: RetryDecision the retry decision. If RetryDecision.Rethrow is
returned, an
com.datastax.driver.core.exceptions.UnavailableException will be
thrown for the operation.