| /* |
| * 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 dynamic |
| |
| import ( |
| "strconv" |
| "sync" |
| "time" |
| ) |
| |
| import ( |
| "github.com/dubbogo/gost/container/set" |
| perrors "github.com/pkg/errors" |
| ) |
| |
| import ( |
| commonCfg "dubbo.apache.org/dubbo-go/v3/common/config" |
| "dubbo.apache.org/dubbo-go/v3/common/constant" |
| "dubbo.apache.org/dubbo-go/v3/common/extension" |
| "dubbo.apache.org/dubbo-go/v3/common/logger" |
| "dubbo.apache.org/dubbo-go/v3/config" |
| "dubbo.apache.org/dubbo-go/v3/config_center" |
| "dubbo.apache.org/dubbo-go/v3/metadata/mapping" |
| ) |
| |
| const ( |
| defaultGroup = "mapping" |
| slash = "/" |
| ) |
| |
| func init() { |
| extension.SetGlobalServiceNameMapping(GetNameMappingInstance) |
| } |
| |
| // DynamicConfigurationServiceNameMapping is the implementation based on config center |
| // it's a singleton |
| type DynamicConfigurationServiceNameMapping struct { |
| dc config_center.DynamicConfiguration |
| } |
| |
| // Map will map the service to this application-level service |
| func (d *DynamicConfigurationServiceNameMapping) Map(serviceInterface string, group string, version string, protocol string) error { |
| // metadata service is admin service, should not be mapped |
| if constant.METADATA_SERVICE_NAME == serviceInterface { |
| logger.Info("try to map the metadata service, will be ignored") |
| return nil |
| } |
| |
| appName := config.GetApplicationConfig().Name |
| value := time.Now().UnixNano() |
| |
| err := d.dc.PublishConfig(appName, |
| d.buildGroup(serviceInterface), |
| strconv.FormatInt(value, 10)) |
| if err != nil { |
| return perrors.WithStack(err) |
| } |
| return nil |
| } |
| |
| // Get will return the application-level services. If not found, the empty set will be returned. |
| // if the dynamic configuration got error, the error will return |
| func (d *DynamicConfigurationServiceNameMapping) Get(serviceInterface string, group string, version string, protocol string) (*gxset.HashSet, error) { |
| return d.dc.GetConfigKeysByGroup(d.buildGroup(serviceInterface)) |
| } |
| |
| // buildGroup will return group, now it looks like defaultGroup/serviceInterface |
| func (d *DynamicConfigurationServiceNameMapping) buildGroup(serviceInterface string) string { |
| // the issue : https://github.com/apache/dubbo/issues/4671 |
| // so other params are ignored and remove, including group string, version string, protocol string |
| return defaultGroup + slash + serviceInterface |
| } |
| |
| var ( |
| serviceNameMappingInstance *DynamicConfigurationServiceNameMapping |
| serviceNameMappingOnce sync.Once |
| ) |
| |
| // GetNameMappingInstance return an instance, if not found, it creates one |
| func GetNameMappingInstance() mapping.ServiceNameMapping { |
| serviceNameMappingOnce.Do(func() { |
| dc := commonCfg.GetEnvInstance().GetDynamicConfiguration() |
| serviceNameMappingInstance = &DynamicConfigurationServiceNameMapping{dc: dc} |
| }) |
| return serviceNameMappingInstance |
| } |