| /* |
| * 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 ( |
| "github.com/apache/servicecomb-service-center/pkg/log" |
| "github.com/apache/servicecomb-service-center/pkg/util" |
| apt "github.com/apache/servicecomb-service-center/server/core" |
| "github.com/apache/servicecomb-service-center/server/core/backend" |
| pb "github.com/apache/servicecomb-service-center/server/core/proto" |
| "github.com/apache/servicecomb-service-center/server/plugin/pkg/discovery" |
| "github.com/apache/servicecomb-service-center/server/service/cache" |
| "github.com/apache/servicecomb-service-center/server/service/metrics" |
| nf "github.com/apache/servicecomb-service-center/server/service/notification" |
| serviceUtil "github.com/apache/servicecomb-service-center/server/service/util" |
| "golang.org/x/net/context" |
| "strings" |
| ) |
| |
| type InstanceEventHandler struct { |
| } |
| |
| func (h *InstanceEventHandler) Type() discovery.Type { |
| return backend.INSTANCE |
| } |
| |
| func (h *InstanceEventHandler) OnEvent(evt discovery.KvEvent) { |
| action := evt.Type |
| providerId, providerInstanceId, domainProject := apt.GetInfoFromInstKV(evt.KV.Key) |
| |
| switch action { |
| case pb.EVT_INIT: |
| metrics.ReportInstances(1) |
| return |
| case pb.EVT_CREATE: |
| metrics.ReportInstances(1) |
| case pb.EVT_DELETE: |
| metrics.ReportInstances(-1) |
| |
| splited := strings.Split(domainProject, "/") |
| if len(splited) == 2 && !apt.IsDefaultDomainProject(domainProject) { |
| domainName, projectName := splited[0], splited[1] |
| serviceUtil.RemandInstanceQuota( |
| util.SetDomainProject(context.Background(), domainName, projectName)) |
| } |
| } |
| |
| if nf.GetNotifyService().Closed() { |
| log.Warnf("caught [%s] instance[%s/%s] event, but notify service is closed", |
| action, providerId, providerInstanceId) |
| return |
| } |
| |
| // 查询服务版本信息 |
| ctx := context.WithValue(context.WithValue(context.Background(), |
| serviceUtil.CTX_CACHEONLY, "1"), |
| serviceUtil.CTX_GLOBAL, "1") |
| ms, err := serviceUtil.GetService(ctx, domainProject, providerId) |
| if ms == nil { |
| log.Errorf(err, "caught [%s] instance[%s/%s] event, get cached provider's file failed", |
| action, providerId, providerInstanceId) |
| return |
| } |
| |
| log.Infof("caught [%s] service[%s][%s/%s/%s/%s] instance[%s] event", |
| action, providerId, ms.Environment, ms.AppId, ms.ServiceName, ms.Version, providerInstanceId) |
| |
| // 查询所有consumer |
| consumerIds, _, err := serviceUtil.GetAllConsumerIds(ctx, domainProject, ms) |
| if err != nil { |
| log.Errorf(err, "get service[%s][%s/%s/%s/%s]'s consumerIds failed", |
| providerId, ms.Environment, ms.AppId, ms.ServiceName, ms.Version) |
| return |
| } |
| |
| PublishInstanceEvent(domainProject, action, pb.MicroServiceToKey(domainProject, ms), |
| evt.KV.Value.(*pb.MicroServiceInstance), evt.Revision, consumerIds) |
| } |
| |
| func NewInstanceEventHandler() *InstanceEventHandler { |
| return &InstanceEventHandler{} |
| } |
| |
| func PublishInstanceEvent(domainProject string, action pb.EventType, serviceKey *pb.MicroServiceKey, instance *pb.MicroServiceInstance, rev int64, subscribers []string) { |
| defer cache.FindInstances.Remove(serviceKey) |
| |
| if len(subscribers) == 0 { |
| return |
| } |
| |
| response := &pb.WatchInstanceResponse{ |
| Response: pb.CreateResponse(pb.Response_SUCCESS, "Watch instance successfully."), |
| Action: string(action), |
| Key: serviceKey, |
| Instance: instance, |
| } |
| for _, consumerId := range subscribers { |
| // TODO add超时怎么处理? |
| job := nf.NewWatchJob(consumerId, apt.GetInstanceRootKey(domainProject)+"/", rev, response) |
| nf.GetNotifyService().AddJob(job) |
| } |
| } |