| /* |
| * 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" |
| "strconv" |
| ) |
| |
| 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() { |
| extension.AddCustomizers(&ProtocolPortsMetadataCustomizer{}) |
| } |
| |
| // ProtocolPortsMetadataCustomizer will update the endpoints |
| type ProtocolPortsMetadataCustomizer struct{} |
| |
| // GetPriority will return 0, which means it will be invoked at the beginning |
| func (p *ProtocolPortsMetadataCustomizer) GetPriority() int { |
| return 0 |
| } |
| |
| // Customize put the the string like [{"protocol": "dubbo", "port": 123}] into instance's metadata |
| func (p *ProtocolPortsMetadataCustomizer) Customize(instance registry.ServiceInstance) { |
| metadataService, err := getMetadataService() |
| if err != nil { |
| logger.Errorf("Could not init the MetadataService", err) |
| return |
| } |
| |
| // 4 is enough... we don't have many protocol |
| protocolMap := make(map[string]int, 4) |
| |
| list, err := metadataService.GetExportedURLs(constant.ANY_VALUE, constant.ANY_VALUE, constant.ANY_VALUE, constant.ANY_VALUE) |
| if err != nil || len(list) == 0 { |
| logger.Debugf("Could not find exported urls", err) |
| return |
| } |
| |
| for _, ui := range list { |
| u, err := common.NewURL(ui.(string)) |
| if err != nil || len(u.Protocol) == 0 { |
| logger.Errorf("the url string is invalid: %s", ui.(string), err) |
| continue |
| } |
| |
| port, err := strconv.Atoi(u.Port) |
| if err != nil { |
| logger.Errorf("Could not customize the metadata of port. ", err) |
| } |
| protocolMap[u.Protocol] = port |
| } |
| |
| instance.GetMetadata()[constant.SERVICE_INSTANCE_ENDPOINTS] = endpointsStr(protocolMap) |
| } |
| |
| // endpointsStr convert the map to json like [{"protocol": "dubbo", "port": 123}] |
| func endpointsStr(protocolMap map[string]int) string { |
| if len(protocolMap) == 0 { |
| return "" |
| } |
| |
| endpoints := make([]endpoint, 0, len(protocolMap)) |
| for k, v := range protocolMap { |
| endpoints = append(endpoints, endpoint{ |
| Port: v, |
| Protocol: k, |
| }) |
| } |
| |
| str, err := json.Marshal(endpoints) |
| if err != nil { |
| logger.Errorf("could not convert the endpoints to json", err) |
| return "" |
| } |
| return string(str) |
| } |
| |
| // nolint |
| type endpoint struct { |
| Port int `json:"port, omitempty"` |
| Protocol string `json:"protocol, omitempty"` |
| } |