apollo-client/src/main/java/com/ctrip/framework/apollo/internals/RemoteConfigLongPollService.java/RemoteConfigLongPollService/updateRemoteNotifications
class RemoteConfigLongPollService:  private void updateRemoteNotifications(List<ApolloConfigNotification> deltaNotifications) {
    for (ApolloConfigNotification notification : deltaNotifications) {
      if (Strings.isNullOrEmpty(notification.getNamespaceName())) {
        continue;
      }

      if (notification.getMessages() == null || notification.getMessages().isEmpty()) {
        continue;
      }

      ApolloNotificationMessages localRemoteMessages =
          m_remoteNotificationMessages.get(notification.getNamespaceName());
      if (localRemoteMessages == null) {
        localRemoteMessages = new ApolloNotificationMessages();
        m_remoteNotificationMessages.put(notification.getNamespaceName(), localRemoteMessages);
      }

      localRemoteMessages.mergeFrom(notification.getMessages());
    }
  }