@Override
        public Integer getValue() {
          return forGauge.get();
        }
Get the AtomicInteger behind an existing gauge, or create a new gauge if it does not already
exist.
@param name Name of gauge.  This should come from MetricConstants
@return AtomicInteger underlying this gauge.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/metrics/Metrics.java