| /* |
| * 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" |
| "time" |
| |
| "github.com/go-chassis/cari/discovery" |
| |
| "github.com/apache/servicecomb-service-center/datasource" |
| "github.com/apache/servicecomb-service-center/datasource/mongo" |
| "github.com/apache/servicecomb-service-center/datasource/mongo/model" |
| "github.com/apache/servicecomb-service-center/datasource/mongo/sd" |
| "github.com/apache/servicecomb-service-center/pkg/log" |
| simple "github.com/apache/servicecomb-service-center/pkg/time" |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| "github.com/apache/servicecomb-service-center/server/event" |
| ) |
| |
| // InstanceEventHandler is the handler to handle events |
| // as instance registry or instance delete, and notify syncer |
| type InstanceEventHandler struct { |
| } |
| |
| func (h InstanceEventHandler) Type() string { |
| return model.CollectionInstance |
| } |
| |
| func (h InstanceEventHandler) OnEvent(evt sd.MongoEvent) { |
| action := evt.Type |
| instance, ok := evt.Value.(model.Instance) |
| if !ok { |
| log.Error("failed to assert instance", datasource.ErrAssertFail) |
| return |
| } |
| providerID := instance.Instance.ServiceId |
| providerInstanceID := instance.Instance.InstanceId |
| domainProject := instance.Domain + "/" + instance.Project |
| ctx := util.SetDomainProject(context.Background(), instance.Domain, instance.Project) |
| |
| res, err := mongo.GetServiceByID(ctx, providerID) |
| if err != nil { |
| log.Error(fmt.Sprintf("caught [%s] instance[%s/%s] event, endpoints %v, get provider's file failed from db\n", |
| action, providerID, providerInstanceID, instance.Instance.Endpoints), err) |
| } |
| if res == nil { |
| return |
| } |
| microService := res.Service |
| if action == discovery.EVT_INIT { |
| return |
| } |
| consumerIDs, err := mongo.GetConsumerIDs(ctx, microService) |
| if err != nil { |
| log.Error(fmt.Sprintf("get service[%s][%s/%s/%s/%s]'s consumerIDs failed", |
| providerID, microService.Environment, microService.AppId, microService.ServiceName, microService.Version), err) |
| return |
| } |
| PublishInstanceEvent(evt, discovery.MicroServiceToKey(domainProject, microService), consumerIDs) |
| } |
| |
| func NewInstanceEventHandler() *InstanceEventHandler { |
| return &InstanceEventHandler{} |
| } |
| |
| func PublishInstanceEvent(evt sd.MongoEvent, serviceKey *discovery.MicroServiceKey, subscribers []string) { |
| if len(subscribers) == 0 { |
| return |
| } |
| response := &discovery.WatchInstanceResponse{ |
| Action: string(evt.Type), |
| Key: serviceKey, |
| Instance: evt.Value.(model.Instance).Instance, |
| } |
| for _, consumerID := range subscribers { |
| evt := event.NewInstanceEvent(consumerID, -1, simple.FromTime(time.Now()), response) |
| err := event.Center().Fire(evt) |
| if err != nil { |
| log.Error(fmt.Sprintf("publish event[%v] into channel failed", evt), err) |
| } |
| } |
| } |