| /* |
| * 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 event |
| |
| import ( |
| "encoding/json" |
| ) |
| |
| import ( |
| gxset "github.com/dubbogo/gost/container/set" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go/common" |
| "github.com/apache/dubbo-go/common/constant" |
| "github.com/apache/dubbo-go/common/extension" |
| "github.com/apache/dubbo-go/common/logger" |
| "github.com/apache/dubbo-go/registry" |
| ) |
| |
| func init() { |
| exceptKeys := gxset.NewSet( |
| // remove APPLICATION_KEY because service name must be present |
| constant.APPLICATION_KEY, |
| // remove GROUP_KEY, always uses service name. |
| constant.GROUP_KEY, |
| // remove TIMESTAMP_KEY because it's nonsense |
| constant.TIMESTAMP_KEY) |
| extension.AddCustomizers(&metadataServiceURLParamsMetadataCustomizer{exceptKeys: exceptKeys}) |
| } |
| |
| type metadataServiceURLParamsMetadataCustomizer struct { |
| exceptKeys *gxset.HashSet |
| } |
| |
| // GetPriority will return 0 so that it will be invoked in front of user defining Customizer |
| func (m *metadataServiceURLParamsMetadataCustomizer) GetPriority() int { |
| return 0 |
| } |
| |
| func (m *metadataServiceURLParamsMetadataCustomizer) Customize(instance registry.ServiceInstance) { |
| ms, err := getMetadataService() |
| if err != nil { |
| logger.Errorf("could not find the metadata service", err) |
| return |
| } |
| serviceName := constant.METADATA_SERVICE_NAME |
| // error always is nil |
| version, _ := ms.Version() |
| group := instance.GetServiceName() |
| urls, err := ms.GetExportedURLs(serviceName, group, version, constant.ANY_VALUE) |
| if err != nil || len(urls) == 0 { |
| logger.Info("could not find the exported urls", err) |
| return |
| } |
| ps := m.convertToParams(urls) |
| str, err := json.Marshal(ps) |
| if err != nil { |
| logger.Errorf("could not transfer the map to json", err) |
| return |
| } |
| instance.GetMetadata()[constant.METADATA_SERVICE_URL_PARAMS_PROPERTY_NAME] = string(str) |
| } |
| |
| func (m *metadataServiceURLParamsMetadataCustomizer) convertToParams(urls []interface{}) map[string]map[string]string { |
| // usually there will be only one protocol |
| res := make(map[string]map[string]string, 1) |
| // those keys are useless |
| |
| for _, ui := range urls { |
| u, err := common.NewURL(ui.(string)) |
| if err != nil { |
| logger.Errorf("could not parse the string to url: %s", ui.(string), err) |
| continue |
| } |
| p := make(map[string]string, len(u.GetParams())) |
| for k, v := range u.GetParams() { |
| // we will ignore that |
| if m.exceptKeys.Contains(k) || len(v) == 0 || len(v[0]) == 0 { |
| continue |
| } |
| p[k] = v[0] |
| } |
| p[constant.PORT_KEY] = u.Port |
| res[u.Protocol] = p |
| } |
| return res |
| } |