apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/service/ReleaseMessageServiceWithCache.java/ReleaseMessageServiceWithCache/populateDataBaseInterval
class ReleaseMessageServiceWithCache:  private void populateDataBaseInterval() {
    scanInterval = bizConfig.releaseMessageCacheScanInterval();
    scanIntervalTimeUnit = bizConfig.releaseMessageCacheScanIntervalTimeUnit();
  }