question: @ Override public StateConnection onCloseRead ( ) { ConnectionProtocol request = request ( ) ; if ( request != null ) { request . onCloseRead ( ) ; } _sequenceClose . set ( _sequenceRead . get ( ) ) ; if ( _sequenceFlush . get ( ) < _sequenceClose . get ( ) ) { _isClosePending . set ( true ) ; if ( _sequenceFlush . get ( ) < _sequenceClose . get ( ) ) { return StateConnection . CLOSE_READ_S ; } else { _isClosePending . set ( false ) ; return StateConnection . CLOSE ; } } else { return StateConnection . CLOSE ; } }
target:  Called by reader thread on reader end of file.