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[nspcc-dev#112] api: Add cache for ListObjectsV2
Signed-off-by: Angira Kekteeva <kira@nspcc.ru>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package layer | ||
|
|
||
| import ( | ||
| "sync" | ||
| "time" | ||
|
|
||
| cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id" | ||
| ) | ||
|
|
||
| // ObjectsListV2Cache provides interface for cache of ListObjectsV2 in a layer struct. | ||
| type ObjectsListV2Cache interface { | ||
| Timer | ||
| GetCache(token string, key string) []*ObjectInfo | ||
| PutCache(key string, objects []*ObjectInfo) | ||
| } | ||
|
|
||
| var ( | ||
| ticker = time.NewTicker(time.Second * 60) | ||
| ) | ||
|
|
||
| type ( | ||
| listObjectsCache struct { | ||
| caches map[string]cache | ||
| quit chan struct{} | ||
| mtx sync.RWMutex | ||
| } | ||
| cache struct { | ||
| list []*ObjectInfo | ||
| created time.Time | ||
| } | ||
| ) | ||
|
|
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| func (l *listObjectsCache) GetCache(token, key string) []*ObjectInfo { | ||
| if val, ok := l.caches[key]; ok { | ||
| for i, obj := range val.list { | ||
| if obj.ID().String() == token { | ||
| return val.list[i:] | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
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| func (l *listObjectsCache) PutCache(key string, objects []*ObjectInfo) { | ||
| var ( | ||
| c cache | ||
| ) | ||
| l.mtx.Lock() | ||
| defer l.mtx.Unlock() | ||
| c.list = objects | ||
| c.created = time.Now().UTC() | ||
| l.caches[key] = c | ||
| } | ||
|
|
||
| func (l *listObjectsCache) StartTimer() { | ||
| for { | ||
| select { | ||
| case <-ticker.C: | ||
| cur := time.Now() | ||
| for key, obj := range l.caches { | ||
| if cur.Sub(obj.created) >= time.Minute { | ||
| l.mtx.Lock() | ||
| delete(l.caches, key) | ||
| l.mtx.Unlock() | ||
| } | ||
| } | ||
| case <-l.quit: | ||
| ticker.Stop() | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (l *listObjectsCache) StopTimer() { | ||
| l.quit <- struct{}{} | ||
| } | ||
|
|
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| func createKey(accessKey *string, cid *cid.ID) string { | ||
| return *accessKey + cid.String() | ||
| } | ||
|
|
||
| func newListObjectsCache() *listObjectsCache { | ||
| c := listObjectsCache{} | ||
|
|
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| c.quit = make(chan struct{}) | ||
| c.caches = make(map[string]cache) | ||
|
|
||
| return &c | ||
| } |
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