A.若代理可执行该操作,返回notErrorB.若代理可执行该操作,返回ValueC.若代理不执行该操作,返回wrongValueD.若代理不执行该操作,返回Error
A.active notInService notReadyB.active notInService createAndWaitC.active createAndWait createAndGoD.active createAndWait destroy
A.RowStatus notReadyB.RowStatus write -onlyC.RowStatus read -writeD.RowStatus read -only