func()

in config/service_config.go [227:334]

• 95 lines of code
• 20 McCabe index (conditional complexity)

func (s *ServiceConfig) Export() error {
	// TODO: delay export
	if s.unexported != nil && s.unexported.Load() {
		err := perrors.Errorf("The service %v has already unexported!", s.Interface)
		logger.Errorf(err.Error())
		return err
	}
	if s.exported != nil && s.exported.Load() {
		logger.Warnf("The service %v has already exported!", s.Interface)
		return nil
	}

	regUrls := make([]*common.URL, 0)
	if !s.NotRegister {
		regUrls = loadRegistries(s.RegistryIDs, s.RCRegistriesMap, common.PROVIDER)
	}

	urlMap := s.getUrlMap()
	protocolConfigs := loadProtocol(s.ProtocolIDs, s.RCProtocolsMap)
	if len(protocolConfigs) == 0 {
		logger.Warnf("The service %v's '%v' protocols don't has right protocolConfigs, Please check your configuration center and transfer protocol ", s.Interface, s.ProtocolIDs)
		return nil
	}

	ports := getRandomPort(protocolConfigs)
	nextPort := ports.Front()
	proxyFactory := extension.GetProxyFactory(s.ProxyFactoryKey)
	for _, proto := range protocolConfigs {
		// registry the service reflect
		methods, err := common.ServiceMap.Register(s.Interface, proto.Name, s.Group, s.Version, s.rpcService)
		if err != nil {
			formatErr := perrors.Errorf("The service %v export the protocol %v error! Error message is %v.",
				s.Interface, proto.Name, err.Error())
			logger.Errorf(formatErr.Error())
			return formatErr
		}

		port := proto.Port
		if len(proto.Port) == 0 {
			port = nextPort.Value.(string)
			nextPort = nextPort.Next()
		}
		ivkURL := common.NewURLWithOptions(
			common.WithPath(s.Interface),
			common.WithProtocol(proto.Name),
			common.WithIp(proto.Ip),
			common.WithPort(port),
			common.WithParams(urlMap),
			common.WithParamsValue(constant.BeanNameKey, s.id),
			//common.WithParamsValue(constant.SslEnabledKey, strconv.FormatBool(config.GetSslEnabled())),
			common.WithMethods(strings.Split(methods, ",")),
			common.WithToken(s.Token),
			common.WithParamsValue(constant.MetadataTypeKey, s.metadataType),
			// fix https://github.com/apache/dubbo-go/issues/2176
			common.WithParamsValue(constant.MaxServerSendMsgSize, proto.MaxServerSendMsgSize),
			common.WithParamsValue(constant.MaxServerRecvMsgSize, proto.MaxServerRecvMsgSize),
		)
		if len(s.Tag) > 0 {
			ivkURL.AddParam(constant.Tagkey, s.Tag)
		}

		// post process the URL to be exported
		s.postProcessConfig(ivkURL)
		// config post processor may set "export" to false
		if !ivkURL.GetParamBool(constant.ExportKey, true) {
			return nil
		}

		if len(regUrls) > 0 {
			s.cacheMutex.Lock()
			if s.cacheProtocol == nil {
				logger.Debugf(fmt.Sprintf("First load the registry protocol, url is {%v}!", ivkURL))
				s.cacheProtocol = extension.GetProtocol(constant.RegistryProtocol)
			}
			s.cacheMutex.Unlock()

			for _, regUrl := range regUrls {
				setRegistrySubURL(ivkURL, regUrl)
				invoker := proxyFactory.GetInvoker(regUrl)
				exporter := s.cacheProtocol.Export(invoker)
				if exporter == nil {
					return perrors.New(fmt.Sprintf("Registry protocol new exporter error, registry is {%v}, url is {%v}", regUrl, ivkURL))
				}
				s.exporters = append(s.exporters, exporter)
			}
		} else {
			if ivkURL.GetParam(constant.InterfaceKey, "") == constant.MetadataServiceName {
				ms, err := extension.GetLocalMetadataService("")
				if err != nil {
					logger.Warnf("export org.apache.dubbo.metadata.MetadataService failed beacause of %s ! pls check if you import _ \"dubbo.apache.org/dubbo-go/v3/metadata/service/local\"", err)
					return nil
				}
				if err := ms.SetMetadataServiceURL(ivkURL); err != nil {
					logger.Warnf("SetMetadataServiceURL error = %s", err)
				}
			}
			invoker := proxyFactory.GetInvoker(ivkURL)
			exporter := extension.GetProtocol(protocolwrapper.FILTER).Export(invoker)
			if exporter == nil {
				return perrors.New(fmt.Sprintf("Filter protocol without registry new exporter error, url is {%v}", ivkURL))
			}
			s.exporters = append(s.exporters, exporter)
		}
		publishServiceDefinition(ivkURL)
	}
	s.exported.Store(true)
	return nil
}