package cache import ( "time" "github.com/bluele/gcache" cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id" "github.com/nspcc-dev/neofs-api-go/pkg/owner" ) type ( // BucketCache provides interface for lru cache for objects. BucketCache interface { Get(key string) *BucketInfo Put(bkt *BucketInfo) error Delete(key string) bool } // BucketInfo stores basic bucket data. BucketInfo struct { Name string CID *cid.ID Owner *owner.ID Created time.Time BasicACL uint32 } // GetBucketCache contains cache with objects and lifetime of cache entries. GetBucketCache struct { cache gcache.Cache lifetime time.Duration } ) // NewBucketCache creates an object of BucketCache. func NewBucketCache(cacheSize int, lifetime time.Duration) *GetBucketCache { gc := gcache.New(cacheSize).LRU().Build() return &GetBucketCache{cache: gc, lifetime: lifetime} } // Get returns cached object. func (o *GetBucketCache) Get(key string) *BucketInfo { entry, err := o.cache.Get(key) if err != nil { return nil } result, ok := entry.(*BucketInfo) if !ok { return nil } return result } // Put puts an object to cache. func (o *GetBucketCache) Put(bkt *BucketInfo) error { return o.cache.SetWithExpire(bkt.Name, bkt, o.lifetime) } // Delete deletes an object from cache. func (o *GetBucketCache) Delete(key string) bool { return o.cache.Remove(key) } const bktVersionSettingsObject = ".s3-versioning-settings" // SettingsObjectName is system name for bucket settings file. func (b *BucketInfo) SettingsObjectName() string { return bktVersionSettingsObject } // SystemObjectKey is key to use in SystemCache. func (b *BucketInfo) SystemObjectKey(obj string) string { return b.Name + obj }