| /* |
| * 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 nacos |
| |
| import ( |
| "bytes" |
| "strconv" |
| "strings" |
| "time" |
| ) |
| |
| import ( |
| nacosClient "github.com/dubbogo/gost/database/kv/nacos" |
| |
| "github.com/nacos-group/nacos-sdk-go/vo" |
| |
| perrors "github.com/pkg/errors" |
| ) |
| |
| import ( |
| "dubbo.apache.org/dubbo-go/v3/common" |
| "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/registry" |
| "dubbo.apache.org/dubbo-go/v3/remoting/nacos" |
| ) |
| |
| var localIP = "" |
| |
| const ( |
| // RegistryConnDelay registry connection delay |
| RegistryConnDelay = 3 |
| ) |
| |
| func init() { |
| localIP = common.GetLocalIp() |
| extension.SetRegistry(constant.NACOS_KEY, newNacosRegistry) |
| } |
| |
| type nacosRegistry struct { |
| *common.URL |
| namingClient *nacosClient.NacosNamingClient |
| registryUrls []*common.URL |
| } |
| |
| func getCategory(url *common.URL) string { |
| role, _ := strconv.Atoi(url.GetParam(constant.ROLE_KEY, strconv.Itoa(constant.NACOS_DEFAULT_ROLETYPE))) |
| category := common.DubboNodes[role] |
| return category |
| } |
| |
| func getServiceName(url *common.URL) string { |
| var buffer bytes.Buffer |
| |
| buffer.Write([]byte(getCategory(url))) |
| appendParam(&buffer, url, constant.INTERFACE_KEY) |
| appendParam(&buffer, url, constant.VERSION_KEY) |
| appendParam(&buffer, url, constant.GROUP_KEY) |
| return buffer.String() |
| } |
| |
| func appendParam(target *bytes.Buffer, url *common.URL, key string) { |
| value := url.GetParam(key, "") |
| target.Write([]byte(constant.NACOS_SERVICE_NAME_SEPARATOR)) |
| if strings.TrimSpace(value) != "" { |
| target.Write([]byte(value)) |
| } |
| } |
| |
| func createRegisterParam(url *common.URL, serviceName string) vo.RegisterInstanceParam { |
| category := getCategory(url) |
| params := make(map[string]string) |
| |
| url.RangeParams(func(key, value string) bool { |
| params[key] = value |
| return true |
| }) |
| |
| params[constant.NACOS_CATEGORY_KEY] = category |
| params[constant.NACOS_PROTOCOL_KEY] = url.Protocol |
| params[constant.NACOS_PATH_KEY] = url.Path |
| if len(url.Ip) == 0 { |
| url.Ip = localIP |
| } |
| if len(url.Port) == 0 || url.Port == "0" { |
| url.Port = "80" |
| } |
| port, _ := strconv.Atoi(url.Port) |
| instance := vo.RegisterInstanceParam{ |
| Ip: url.Ip, |
| Port: uint64(port), |
| Metadata: params, |
| Weight: 1, |
| Enable: true, |
| Healthy: true, |
| Ephemeral: true, |
| ServiceName: serviceName, |
| } |
| return instance |
| } |
| |
| // Register will register the service @url to its nacos registry center |
| func (nr *nacosRegistry) Register(url *common.URL) error { |
| serviceName := getServiceName(url) |
| param := createRegisterParam(url, serviceName) |
| isRegistry, err := nr.namingClient.Client().RegisterInstance(param) |
| if err != nil { |
| return err |
| } |
| if !isRegistry { |
| return perrors.New("registry [" + serviceName + "] to nacos failed") |
| } |
| nr.registryUrls = append(nr.registryUrls, url) |
| return nil |
| } |
| |
| func createDeregisterParam(url *common.URL, serviceName string) vo.DeregisterInstanceParam { |
| if len(url.Ip) == 0 { |
| url.Ip = localIP |
| } |
| if len(url.Port) == 0 || url.Port == "0" { |
| url.Port = "80" |
| } |
| port, _ := strconv.Atoi(url.Port) |
| return vo.DeregisterInstanceParam{ |
| Ip: url.Ip, |
| Port: uint64(port), |
| ServiceName: serviceName, |
| Ephemeral: true, |
| } |
| } |
| |
| func (nr *nacosRegistry) DeRegister(url *common.URL) error { |
| serviceName := getServiceName(url) |
| param := createDeregisterParam(url, serviceName) |
| isDeRegistry, err := nr.namingClient.Client().DeregisterInstance(param) |
| if err != nil { |
| return err |
| } |
| if !isDeRegistry { |
| return perrors.New("DeRegistry [" + serviceName + "] to nacos failed") |
| } |
| return nil |
| } |
| |
| // UnRegister |
| func (nr *nacosRegistry) UnRegister(conf *common.URL) error { |
| return perrors.New("UnRegister is not support in nacosRegistry") |
| } |
| |
| func (nr *nacosRegistry) subscribe(conf *common.URL) (registry.Listener, error) { |
| return NewNacosListener(conf, nr.namingClient) |
| } |
| |
| // subscribe from registry |
| func (nr *nacosRegistry) Subscribe(url *common.URL, notifyListener registry.NotifyListener) error { |
| // TODO |
| // role, _ := strconv.Atoi(nr.URL.GetParam(constant.ROLE_KEY, "")) |
| role, _ := strconv.Atoi(url.GetParam(constant.ROLE_KEY, "")) |
| if role != common.CONSUMER { |
| return nil |
| } |
| |
| for { |
| if !nr.IsAvailable() { |
| logger.Warnf("event listener game over.") |
| return perrors.New("nacosRegistry is not available.") |
| } |
| |
| listener, err := nr.subscribe(url) |
| if err != nil { |
| if !nr.IsAvailable() { |
| logger.Warnf("event listener game over.") |
| return err |
| } |
| logger.Warnf("getListener() = err:%v", perrors.WithStack(err)) |
| time.Sleep(time.Duration(RegistryConnDelay) * time.Second) |
| continue |
| } |
| |
| for { |
| serviceEvent, err := listener.Next() |
| if err != nil { |
| logger.Warnf("Selector.watch() = error{%v}", perrors.WithStack(err)) |
| listener.Close() |
| return err |
| } |
| logger.Infof("update begin, service event: %v", serviceEvent.String()) |
| notifyListener.Notify(serviceEvent) |
| } |
| } |
| } |
| |
| // UnSubscribe : |
| func (nr *nacosRegistry) UnSubscribe(url *common.URL, notifyListener registry.NotifyListener) error { |
| return perrors.New("UnSubscribe not support in nacosRegistry") |
| } |
| |
| // GetURL gets its registration URL |
| func (nr *nacosRegistry) GetURL() *common.URL { |
| return nr.URL |
| } |
| |
| // IsAvailable determines nacos registry center whether it is available |
| func (nr *nacosRegistry) IsAvailable() bool { |
| // TODO |
| return true |
| } |
| |
| // nolint |
| func (nr *nacosRegistry) Destroy() { |
| for _, url := range nr.registryUrls { |
| err := nr.DeRegister(url) |
| logger.Infof("DeRegister Nacos URL:%+v", url) |
| if err != nil { |
| logger.Errorf("Deregister URL:%+v err:%v", url, err.Error()) |
| } |
| } |
| return |
| } |
| |
| // newNacosRegistry will create new instance |
| func newNacosRegistry(url *common.URL) (registry.Registry, error) { |
| namingClient, err := nacos.NewNacosClientByUrl(url) |
| if err != nil { |
| return &nacosRegistry{}, err |
| } |
| tmpRegistry := &nacosRegistry{ |
| URL: url, |
| namingClient: namingClient, |
| registryUrls: []*common.URL{}, |
| } |
| return tmpRegistry, nil |
| } |