apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/environment/DatabasePortalMetaServerProvider.java/DatabasePortalMetaServerProvider/reload
class DatabasePortalMetaServerProvider:  @Override
  public void reload() {
    Map<String, String> map = portalConfig.getMetaServers();
    addresses = Env.transformToEnvMap(map);
    logger.info("Loaded meta server addresses from portal config: {}", addresses);
  }