| /* |
| * 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 ( |
| "context" |
| "fmt" |
| |
| "github.com/apache/servicecomb-service-center/datasource" |
| "github.com/apache/servicecomb-service-center/datasource/etcd/cache" |
| "github.com/apache/servicecomb-service-center/datasource/etcd/path" |
| "github.com/apache/servicecomb-service-center/datasource/etcd/sd" |
| "github.com/apache/servicecomb-service-center/datasource/etcd/state/kvstore" |
| serviceUtil "github.com/apache/servicecomb-service-center/datasource/etcd/util" |
| "github.com/apache/servicecomb-service-center/pkg/dump" |
| "github.com/apache/servicecomb-service-center/pkg/log" |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| "github.com/apache/servicecomb-service-center/server/event" |
| quotasvc "github.com/apache/servicecomb-service-center/server/service/quota" |
| "github.com/apache/servicecomb-service-center/server/syncernotify" |
| pb "github.com/go-chassis/cari/discovery" |
| ) |
| |
| const ( |
| msKeyPrefix = "/cse-sr/ms/files/" |
| sep = "/" |
| ) |
| |
| // InstanceEventHandler is the handler to handle: |
| // 1. report instance metrics |
| // 2. recover the instance quota |
| // 3. publish the instance events to the subscribers |
| // 4. reset the find instance cache |
| type InstanceEventHandler struct { |
| } |
| |
| func (h *InstanceEventHandler) Type() kvstore.Type { |
| return sd.TypeInstance |
| } |
| |
| func (h *InstanceEventHandler) OnEvent(evt kvstore.Event) { |
| action := evt.Type |
| instance, ok := evt.KV.Value.(*pb.MicroServiceInstance) |
| if !ok { |
| log.Error("failed to assert microServiceInstance", datasource.ErrAssertFail) |
| return |
| } |
| providerID, providerInstanceID, domainProject := path.GetInfoFromInstKV(evt.KV.Key) |
| ctx := util.WithGlobal(util.WithCacheOnly(context.Background())) |
| |
| if action == pb.EVT_INIT { |
| return |
| } |
| |
| if action == pb.EVT_DELETE && !datasource.IsDefaultDomainProject(domainProject) { |
| domain, project := path.SplitDomainProject(domainProject) |
| quotasvc.RemandInstance(util.SetDomainProject(context.Background(), domain, project)) |
| } |
| |
| // 查询服务版本信息 |
| ms, err := serviceUtil.GetService(ctx, domainProject, providerID) |
| if err != nil { |
| log.Error(fmt.Sprintf("caught [%s] instance[%s/%s] event, endpoints %v, get cached provider's file failed", |
| action, providerID, providerInstanceID, instance.Endpoints), err) |
| return |
| } |
| |
| if !syncernotify.GetSyncerNotifyCenter().Closed() { |
| NotifySyncerInstanceEvent(evt, domainProject, ms) |
| } |
| |
| if event.Center().Closed() { |
| log.Warn(fmt.Sprintf("caught [%s] instance[%s/%s] event, endpoints %v, but notify service is closed", |
| action, providerID, providerInstanceID, instance.Endpoints)) |
| return |
| } |
| |
| log.Info(fmt.Sprintf("caught [%s] service[%s][%s/%s/%s/%s] instance[%s] event, endpoints %v", |
| action, providerID, ms.Environment, ms.AppId, ms.ServiceName, ms.Version, |
| providerInstanceID, instance.Endpoints)) |
| |
| // 查询所有consumer |
| consumerIDs, err := serviceUtil.GetConsumerIds(ctx, domainProject, ms) |
| if err != nil { |
| log.Error(fmt.Sprintf("get service[%s][%s/%s/%s/%s]'s consumerIDs failed", |
| providerID, ms.Environment, ms.AppId, ms.ServiceName, ms.Version), err) |
| return |
| } |
| |
| PublishInstanceEvent(evt, pb.MicroServiceToKey(domainProject, ms), consumerIDs) |
| } |
| |
| func NewInstanceEventHandler() *InstanceEventHandler { |
| return &InstanceEventHandler{} |
| } |
| |
| func PublishInstanceEvent(evt kvstore.Event, serviceKey *pb.MicroServiceKey, subscribers []string) { |
| defer cache.FindInstances.Remove(serviceKey) |
| |
| if len(subscribers) == 0 { |
| return |
| } |
| |
| response := &pb.WatchInstanceResponse{ |
| Response: pb.CreateResponse(pb.ResponseSuccess, "Watch instance successfully."), |
| Action: string(evt.Type), |
| Key: serviceKey, |
| Instance: evt.KV.Value.(*pb.MicroServiceInstance), |
| } |
| for _, consumerID := range subscribers { |
| evt := event.NewInstanceEvent(consumerID, evt.Revision, evt.CreateAt, response) |
| err := event.Center().Fire(evt) |
| if err != nil { |
| log.Error(fmt.Sprintf("publish event[%v] into channel failed", evt), err) |
| } |
| } |
| } |
| |
| func NotifySyncerInstanceEvent(evt kvstore.Event, domainProject string, ms *pb.MicroService) { |
| msInstance := evt.KV.Value.(*pb.MicroServiceInstance) |
| |
| serviceKey := msKeyPrefix + domainProject + sep + ms.ServiceId |
| msKV := &dump.KV{Key: serviceKey, ClusterName: evt.KV.ClusterName} |
| service := &dump.Microservice{KV: msKV, Value: ms} |
| |
| instKey := string(evt.KV.Key) |
| instKV := &dump.KV{Key: instKey, ClusterName: evt.KV.ClusterName} |
| instance := &dump.Instance{KV: instKV, Value: msInstance} |
| |
| instEvent := &dump.WatchInstanceChangedEvent{ |
| Action: string(evt.Type), |
| Service: service, |
| Instance: instance, |
| } |
| |
| syncernotify.GetSyncerNotifyCenter().AddEvent(instEvent) |
| |
| log.Debug(fmt.Sprintf("success to add instance change event: %v to event queue", instEvent)) |
| } |