private long getMillisecondsTime(long time) {
    if (time < 9999999999l) {
      return time * 1000;
    } else {
      return time;
    }
  }
Map of metricName to metric values. Works on the assumption that metric
name is unique
ambari-server/src/main/java/org/apache/ambari/server/controller/metrics/timeline/cache/TimelineMetricsCacheValue.java