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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /** | ||
| * Tencent is pleased to support the open source community by making Polaris available. | ||
| * | ||
| * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved. | ||
| * | ||
| * Licensed under the BSD 3-Clause License (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://opensource.org/licenses/BSD-3-Clause | ||
| * | ||
| * 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 gray | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "time" | ||
|
|
||
| "go.uber.org/zap" | ||
| "golang.org/x/sync/singleflight" | ||
|
|
||
| "github.com/golang/protobuf/jsonpb" | ||
| types "github.com/polarismesh/polaris/cache/api" | ||
| "github.com/polarismesh/polaris/common/log" | ||
| "github.com/polarismesh/polaris/common/model" | ||
| "github.com/polarismesh/polaris/common/utils" | ||
| "github.com/polarismesh/polaris/store" | ||
| apimodel "github.com/polarismesh/specification/source/go/api/v1/model" | ||
| ) | ||
|
|
||
| var ( | ||
| _ types.GrayCache = (*grayCache)(nil) | ||
| ) | ||
|
|
||
| type grayCache struct { | ||
| *types.BaseCache | ||
| storage store.Store | ||
| grayResources *utils.SyncMap[string, *apimodel.MatchTerm] | ||
| updater *singleflight.Group | ||
| } | ||
|
|
||
| // NewGrayCache create gray cache obj | ||
| func NewGrayCache(storage store.Store, cacheMgr types.CacheManager) types.GrayCache { | ||
| return &grayCache{ | ||
| BaseCache: types.NewBaseCache(storage, cacheMgr), | ||
| storage: storage, | ||
| } | ||
| } | ||
|
|
||
| // Initialize init gray cache | ||
| func (gc *grayCache) Initialize(opt map[string]interface{}) error { | ||
| gc.grayResources = utils.NewSyncMap[string, *apimodel.MatchTerm]() | ||
| gc.updater = &singleflight.Group{} | ||
| return nil | ||
| } | ||
|
|
||
| // Update update cache | ||
| func (gc *grayCache) Update() error { | ||
| // 多个线程竞争，只有一个线程进行更新 | ||
| _, err, _ := gc.updater.Do(gc.Name(), func() (interface{}, error) { | ||
| return nil, gc.DoCacheUpdate(gc.Name(), gc.realUpdate) | ||
| }) | ||
| return err | ||
| } | ||
|
|
||
| func (gc *grayCache) realUpdate() (map[string]time.Time, int64, error) { | ||
| grayResources, err := gc.storage.GetMoreGrayResouces(gc.IsFirstUpdate(), gc.LastFetchTime()) | ||
|
|
||
| if err != nil { | ||
| log.Error("[Cache][Gray] get storage more", zap.Error(err)) | ||
| return nil, -1, err | ||
| } | ||
| if len(grayResources) == 0 { | ||
| return nil, 0, nil | ||
| } | ||
| lastMtimes := gc.setGrayResources(grayResources) | ||
| log.Info("[Cache][Gray] get more gray resource", | ||
| zap.Int("total", len(grayResources))) | ||
| return lastMtimes, int64(len(grayResources)), nil | ||
| } | ||
|
|
||
| func (gc *grayCache) setGrayResources(grayResources []*model.GrayResource) map[string]time.Time { | ||
| lastMtime := gc.LastMtime(gc.Name()).Unix() | ||
| for _, grayResource := range grayResources { | ||
| modifyUnix := grayResource.ModifyTime.Unix() | ||
| if modifyUnix > lastMtime { | ||
| lastMtime = modifyUnix | ||
| } | ||
| grayRule := &apimodel.MatchTerm{} | ||
| reader := bytes.NewReader([]byte(grayResource.MatchRule)) | ||
| err := jsonpb.Unmarshal(reader, grayRule) | ||
| if err != nil { | ||
| log.Error("[Cache][Gray] setGrayResources unmarshal gray rule fail.", | ||
| zap.String("name", grayResource.Name), zap.Error(err)) | ||
| continue | ||
| } | ||
| gc.grayResources.Store(grayResource.Name, grayRule) | ||
| } | ||
|
|
||
| return map[string]time.Time{ | ||
| gc.Name(): time.Unix(lastMtime, 0), | ||
| } | ||
| } | ||
|
|
||
| // Clear clear cache | ||
| func (gc *grayCache) Clear() error { | ||
| gc.BaseCache.Clear() | ||
| gc.grayResources = utils.NewSyncMap[string, *apimodel.MatchTerm]() | ||
| return nil | ||
| } | ||
|
|
||
| // Name return gray name | ||
| func (gc *grayCache) Name() string { | ||
| return types.GrayName | ||
| } | ||
|
|
||
| // GetGrayRule get gray rule | ||
| func (gc *grayCache) GetGrayRule(name string) *apimodel.MatchTerm { | ||
| val, ok := gc.grayResources.Load(name) | ||
| if !ok { | ||
| return nil | ||
| } | ||
| return val | ||
| } |
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