apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/AppNamespaceServiceWithCache.java/AppNamespaceServiceWithCache/populateDataBaseInterval
class AppNamespaceServiceWithCache:  private void populateDataBaseInterval() {
    scanInterval = bizConfig.appNamespaceCacheScanInterval();
    scanIntervalTimeUnit = bizConfig.appNamespaceCacheScanIntervalTimeUnit();
    rebuildInterval = bizConfig.appNamespaceCacheRebuildInterval();
    rebuildIntervalTimeUnit = bizConfig.appNamespaceCacheRebuildIntervalTimeUnit();
  }