private static double calculateFillRatio(long totalLength, int size) {
        if (size > 0) {
            return Math.min(1, (double) totalLength / size / BookKeeperConfig.MAX_APPEND_LENGTH);
        } else {
            return 0;
        }
    }
private static double calculateFillRatio ( long totalLength , int size ) { if ( size > 0 ) { return Math . min ( 1 , ( double ) totalLength / size / BookKeeperConfig . MAX_APPEND_LENGTH ) ; } else { return 0 ; } }
Calculates the FillRatio, which is a number between [0, 1] that represents the average fill of each
write with respect to the maximum BookKeeper write allowance.
@param totalLength Total length of the writes.
@param size Total number of writes.