package cache import ( "fmt" "time" "github.com/bluele/gcache" "github.com/nspcc-dev/neofs-s3-gw/api/data" 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} } // GetObject returns a cached object info. func (o *ObjectsCache) GetObject(address oid.Address) *data.ExtendedObjectInfo { entry, err := o.cache.Get(address) if err != nil { return nil } result, ok := entry.(*data.ExtendedObjectInfo) if !ok { o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)), zap.String("expected", fmt.Sprintf("%T", result))) return nil } return result } // PutObject puts an object info to cache. func (o *ObjectsCache) PutObject(obj *data.ExtendedObjectInfo) error { return o.cache.Set(obj.ObjectInfo.Address(), obj) } // Delete deletes an object from cache. func (o *ObjectsCache) Delete(address oid.Address) bool { return o.cache.Remove(address) }