package cache import ( "fmt" "time" "github.com/bluele/gcache" "github.com/nspcc-dev/neofs-sdk-go/object" oid "github.com/nspcc-dev/neofs-sdk-go/object/id" "go.uber.org/zap" ) // ObjectsCache provides lru cache for objects. type ObjectsCache struct { cache gcache.Cache logger *zap.Logger } const ( // DefaultObjectsCacheLifetime is a default lifetime of entries in objects' cache. DefaultObjectsCacheLifetime = time.Minute * 5 // DefaultObjectsCacheSize is a default maximum number of entries in objects' cache. DefaultObjectsCacheSize = 1e6 ) // DefaultObjectsConfig returns new default cache expiration values. func DefaultObjectsConfig(logger *zap.Logger) *Config { return &Config{ Size: DefaultObjectsCacheSize, Lifetime: DefaultObjectsCacheLifetime, Logger: logger, } } // New creates an object of ObjectHeadersCache. func New(config *Config) *ObjectsCache { gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build() return &ObjectsCache{cache: gc, logger: config.Logger} } // Get returns a cached object. func (o *ObjectsCache) Get(address oid.Address) *object.Object { entry, err := o.cache.Get(address.EncodeToString()) if err != nil { return nil } result, ok := entry.(object.Object) if !ok { o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)), zap.String("expected", "object.Object")) return nil } return &result } // Put puts an object to cache. func (o *ObjectsCache) Put(obj object.Object) error { cnrID, ok := obj.ContainerID() if !ok { return fmt.Errorf("empty container id") } objID, ok := obj.ID() if !ok { return fmt.Errorf("empty object id") } var addr oid.Address addr.SetContainer(cnrID) addr.SetObject(objID) return o.cache.Set(addr.EncodeToString(), obj) } // Delete deletes an object from cache. func (o *ObjectsCache) Delete(address oid.Address) bool { return o.cache.Remove(address.EncodeToString()) }