| /* |
| * 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 polaris |
| |
| import ( |
| "fmt" |
| "strconv" |
| "sync" |
| "time" |
| ) |
| |
| import ( |
| "github.com/dubbogo/gost/log/logger" |
| |
| perrors "github.com/pkg/errors" |
| |
| api "github.com/polarismesh/polaris-go" |
| "github.com/polarismesh/polaris-go/pkg/model" |
| ) |
| |
| 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/registry" |
| "dubbo.apache.org/dubbo-go/v3/remoting" |
| "dubbo.apache.org/dubbo-go/v3/remoting/polaris" |
| ) |
| |
| const ( |
| RegistryConnDelay = 3 |
| defaultHeartbeatIntervalSec = 5 |
| ) |
| |
| func init() { |
| extension.SetRegistry(constant.PolarisKey, newPolarisRegistry) |
| } |
| |
| // newPolarisRegistry will create new instance |
| func newPolarisRegistry(url *common.URL) (registry.Registry, error) { |
| if err := polaris.InitSDKContext(url); err != nil { |
| return &polarisRegistry{}, err |
| } |
| |
| providerApi, err := polaris.GetProviderAPI() |
| if err != nil { |
| return nil, err |
| } |
| |
| consumerApi, err := polaris.GetConsumerAPI() |
| if err != nil { |
| return nil, err |
| } |
| |
| pRegistry := &polarisRegistry{ |
| url: url, |
| namespace: url.GetParam(constant.RegistryNamespaceKey, constant.PolarisDefaultNamespace), |
| provider: providerApi, |
| consumer: consumerApi, |
| registryUrls: make([]*common.URL, 0, 4), |
| watchers: map[string]*PolarisServiceWatcher{}, |
| } |
| |
| return pRegistry, nil |
| } |
| |
| type polarisRegistry struct { |
| namespace string |
| url *common.URL |
| consumer api.ConsumerAPI |
| provider api.ProviderAPI |
| lock sync.RWMutex |
| registryUrls []*common.URL |
| listenerLock sync.RWMutex |
| watchers map[string]*PolarisServiceWatcher |
| } |
| |
| // Register will register the service @url to its polaris registry center. |
| func (pr *polarisRegistry) Register(url *common.URL) error { |
| |
| serviceName := getServiceName(url) |
| request := createRegisterParam(url, serviceName) |
| request.Namespace = pr.namespace |
| resp, err := pr.provider.RegisterInstance(request) |
| if err != nil { |
| return err |
| } |
| |
| if resp.Existed { |
| logger.Warnf("instance already regist, namespace:%+v, service:%+v, host:%+v, port:%+v", |
| request.Namespace, request.Service, request.Host, request.Port) |
| } |
| url.SetParam(constant.PolarisInstanceID, resp.InstanceID) |
| |
| pr.lock.Lock() |
| pr.registryUrls = append(pr.registryUrls, url) |
| pr.lock.Unlock() |
| |
| return nil |
| } |
| |
| // UnRegister returns nil if unregister successfully. If not, returns an error. |
| func (pr *polarisRegistry) UnRegister(conf *common.URL) error { |
| request := createDeregisterParam(conf, getServiceName(conf)) |
| request.Namespace = pr.namespace |
| if err := pr.provider.Deregister(request); err != nil { |
| return perrors.WithMessagef(err, "register(conf:%+v)", conf) |
| } |
| return nil |
| } |
| |
| // Subscribe returns nil if subscribing registry successfully. If not returns an error. |
| func (pr *polarisRegistry) Subscribe(url *common.URL, notifyListener registry.NotifyListener) error { |
| |
| role, _ := strconv.Atoi(url.GetParam(constant.RegistryRoleKey, "")) |
| if role != common.CONSUMER { |
| return nil |
| } |
| timer := time.NewTimer(time.Duration(RegistryConnDelay) * time.Second) |
| defer timer.Stop() |
| |
| for { |
| serviceName := getSubscribeName(url) |
| watcher, err := pr.createPolarisWatcher(serviceName) |
| if err != nil { |
| logger.Warnf("getwatcher() = err:%v", perrors.WithStack(err)) |
| <-timer.C |
| timer.Reset(time.Duration(RegistryConnDelay) * time.Second) |
| continue |
| } |
| |
| listener, err := NewPolarisListener(watcher) |
| if err != nil { |
| logger.Warnf("getListener() = err:%v", perrors.WithStack(err)) |
| <-timer.C |
| timer.Reset(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 returns nil if unsubscribing registry successfully. If not returns an error. |
| func (pr *polarisRegistry) UnSubscribe(url *common.URL, notifyListener registry.NotifyListener) error { |
| // TODO wait polaris support it |
| return perrors.New("UnSubscribe not support in polarisRegistry") |
| } |
| |
| // LoadSubscribeInstances load subscribe instance |
| func (pr *polarisRegistry) LoadSubscribeInstances(url *common.URL, notify registry.NotifyListener) error { |
| serviceName := getSubscribeName(url) |
| resp, err := pr.consumer.GetAllInstances(&api.GetAllInstancesRequest{ |
| GetAllInstancesRequest: model.GetAllInstancesRequest{ |
| Service: serviceName, |
| Namespace: pr.namespace, |
| }, |
| }) |
| if err != nil { |
| return perrors.New(fmt.Sprintf("could not query the instances for serviceName=%s,namespace=%s,error=%v", |
| serviceName, pr.namespace, err)) |
| } |
| for i := range resp.Instances { |
| if newUrl := generateUrl(resp.Instances[i]); newUrl != nil { |
| notify.Notify(®istry.ServiceEvent{Action: remoting.EventTypeAdd, Service: newUrl}) |
| } |
| } |
| return nil |
| } |
| |
| // GetURL returns polaris registry's url. |
| func (pr *polarisRegistry) GetURL() *common.URL { |
| return pr.url |
| } |
| |
| func (pr *polarisRegistry) createPolarisWatcher(serviceName string) (*PolarisServiceWatcher, error) { |
| |
| pr.listenerLock.Lock() |
| defer pr.listenerLock.Unlock() |
| |
| if _, exist := pr.watchers[serviceName]; !exist { |
| subscribeParam := &api.WatchServiceRequest{ |
| WatchServiceRequest: model.WatchServiceRequest{ |
| Key: model.ServiceKey{ |
| Namespace: pr.namespace, |
| Service: serviceName, |
| }, |
| }, |
| } |
| |
| watcher, err := newPolarisWatcher(subscribeParam, pr.consumer) |
| if err != nil { |
| return nil, err |
| } |
| pr.watchers[serviceName] = watcher |
| } |
| |
| return pr.watchers[serviceName], nil |
| } |
| |
| // Destroy stop polaris registry. |
| func (pr *polarisRegistry) Destroy() { |
| for i := range pr.registryUrls { |
| url := pr.registryUrls[i] |
| err := pr.UnRegister(url) |
| logger.Infof("DeRegister Polaris URL:%+v", url) |
| if err != nil { |
| logger.Errorf("Deregister Polaris URL:%+v err:%v", url, err.Error()) |
| } |
| } |
| return |
| } |
| |
| // IsAvailable always return true when use polaris |
| func (pr *polarisRegistry) IsAvailable() bool { |
| return true |
| } |
| |
| // createRegisterParam convert dubbo url to polaris instance register request |
| func createRegisterParam(url *common.URL, serviceName string) *api.InstanceRegisterRequest { |
| common.HandleRegisterIPAndPort(url) |
| port, _ := strconv.Atoi(url.Port) |
| |
| metadata := make(map[string]string, len(url.GetParams())) |
| url.RangeParams(func(key, value string) bool { |
| metadata[key] = value |
| return true |
| }) |
| metadata[constant.PolarisDubboPath] = url.Path |
| |
| ver := url.GetParam("version", "") |
| |
| req := &api.InstanceRegisterRequest{ |
| InstanceRegisterRequest: model.InstanceRegisterRequest{ |
| Service: serviceName, |
| Host: url.Ip, |
| Port: port, |
| Protocol: &protocolForDubboGO, |
| Version: &ver, |
| Metadata: metadata, |
| }, |
| } |
| |
| req.SetTTL(defaultHeartbeatIntervalSec) |
| |
| return req |
| } |
| |
| // createDeregisterParam convert dubbo url to polaris instance deregister request |
| func createDeregisterParam(url *common.URL, serviceName string) *api.InstanceDeRegisterRequest { |
| common.HandleRegisterIPAndPort(url) |
| port, _ := strconv.Atoi(url.Port) |
| return &api.InstanceDeRegisterRequest{ |
| InstanceDeRegisterRequest: model.InstanceDeRegisterRequest{ |
| Service: serviceName, |
| Host: url.Ip, |
| Port: port, |
| }, |
| } |
| } |