apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/grayReleaseRule/GrayReleaseRulesHolder.java/GrayReleaseRulesHolder/populateDataBaseInterval
class GrayReleaseRulesHolder:  private void populateDataBaseInterval() {
    databaseScanInterval = bizConfig.grayReleaseRuleScanInterval();
  }