| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package configurable |
| |
| import ( |
| "context" |
| "errors" |
| "sync" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go/common" |
| "github.com/apache/dubbo-go/common/constant" |
| "github.com/apache/dubbo-go/common/logger" |
| "github.com/apache/dubbo-go/config" |
| "github.com/apache/dubbo-go/metadata/service" |
| "github.com/apache/dubbo-go/metadata/service/exporter" |
| ) |
| |
| // MetadataServiceExporter is the ConfigurableMetadataServiceExporter which implement MetadataServiceExporter interface |
| type MetadataServiceExporter struct { |
| ServiceConfig *config.ServiceConfig |
| lock sync.RWMutex |
| metadataService service.MetadataService |
| } |
| |
| // NewMetadataServiceExporter will return a service_exporter.MetadataServiceExporter with the specified metadata service |
| func NewMetadataServiceExporter(metadataService service.MetadataService) exporter.MetadataServiceExporter { |
| return &MetadataServiceExporter{ |
| metadataService: metadataService, |
| } |
| } |
| |
| // Export will export the metadataService |
| func (exporter *MetadataServiceExporter) Export(url *common.URL) error { |
| if !exporter.IsExported() { |
| serviceConfig := config.NewServiceConfig(constant.SIMPLE_METADATA_SERVICE_NAME, context.Background()) |
| serviceConfig.Protocol = constant.DEFAULT_PROTOCOL |
| if url == nil || url.SubURL == nil { |
| return errors.New("metadata server url is nil, pls check your configuration") |
| } |
| serviceConfig.Protocols = map[string]*config.ProtocolConfig{ |
| constant.DEFAULT_PROTOCOL: { |
| Name: url.SubURL.Protocol, |
| Port: url.SubURL.Port, |
| }, |
| } |
| serviceConfig.InterfaceName = constant.METADATA_SERVICE_NAME |
| // identify this is a golang server |
| serviceConfig.Params = map[string]string{} |
| serviceConfig.Group = config.GetApplicationConfig().Name |
| // now the error will always be nil |
| serviceConfig.Version, _ = exporter.metadataService.Version() |
| |
| var err error |
| func() { |
| exporter.lock.Lock() |
| defer exporter.lock.Unlock() |
| exporter.ServiceConfig = serviceConfig |
| exporter.ServiceConfig.Implement(exporter.metadataService) |
| err = exporter.ServiceConfig.Export() |
| }() |
| |
| logger.Infof("The MetadataService exports urls : %v ", exporter.ServiceConfig.GetExportedUrls()) |
| return err |
| } |
| logger.Warnf("The MetadataService has been exported : %v ", exporter.ServiceConfig.GetExportedUrls()) |
| return nil |
| } |
| |
| // Unexport will unexport the metadataService |
| func (exporter *MetadataServiceExporter) Unexport() { |
| if exporter.IsExported() { |
| exporter.ServiceConfig.Unexport() |
| } |
| } |
| |
| // GetExportedURLs will return the urls that export use. |
| // Noticeļ¼The exported url is not same as url in registry , for example it lack the ip. |
| func (exporter *MetadataServiceExporter) GetExportedURLs() []*common.URL { |
| return exporter.ServiceConfig.GetExportedUrls() |
| } |
| |
| // isExported will return is metadataServiceExporter exported or not |
| func (exporter *MetadataServiceExporter) IsExported() bool { |
| exporter.lock.RLock() |
| defer exporter.lock.RUnlock() |
| return exporter.ServiceConfig != nil && exporter.ServiceConfig.IsExport() |
| } |