apollo-configservice/src/main/java/com/ctrip/framework/apollo/configservice/ConfigServiceAutoConfiguration.java/MessageScannerConfiguration/MessageScannerConfiguration
class MessageScannerConfiguration:    public MessageScannerConfiguration(
        final NotificationController notificationController,
        final ConfigFileController configFileController,
        final NotificationControllerV2 notificationControllerV2,
        final GrayReleaseRulesHolder grayReleaseRulesHolder,
        final ReleaseMessageServiceWithCache releaseMessageServiceWithCache,
        final ConfigService configService) {
      this.notificationController = notificationController;
      this.configFileController = configFileController;
      this.notificationControllerV2 = notificationControllerV2;
      this.grayReleaseRulesHolder = grayReleaseRulesHolder;
      this.releaseMessageServiceWithCache = releaseMessageServiceWithCache;
      this.configService = configService;
    }