package cache import ( "fmt" "time" "github.com/bluele/gcache" "github.com/nspcc-dev/neofs-s3-gw/api/data" "go.uber.org/zap" ) // SystemCache provides lru cache for objects. // This cache contains "system" objects (bucket versioning settings, tagging object etc.). // Key is bucketName+systemFileName. type SystemCache struct { cache gcache.Cache logger *zap.Logger } const ( // DefaultSystemCacheSize is a default maximum number of entries in cache. DefaultSystemCacheSize = 1e4 // DefaultSystemCacheLifetime is a default lifetime of entries in cache. DefaultSystemCacheLifetime = 5 * time.Minute ) // DefaultSystemConfig returns new default cache expiration values. func DefaultSystemConfig(logger *zap.Logger) *Config { return &Config{ Size: DefaultSystemCacheSize, Lifetime: DefaultSystemCacheLifetime, Logger: logger, } } // NewSystemCache creates an object of SystemCache. func NewSystemCache(config *Config) *SystemCache { gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build() return &SystemCache{cache: gc, logger: config.Logger} } // GetObject returns a cached object. func (o *SystemCache) GetObject(key string) *data.ObjectInfo { entry, err := o.cache.Get(key) if err != nil { return nil } result, ok := entry.(*data.ObjectInfo) if !ok { o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)), zap.String("expected", "*data.ObjectInfo")) return nil } return result } func (o *SystemCache) GetCORS(key string) *data.CORSConfiguration { entry, err := o.cache.Get(key) if err != nil { return nil } result, ok := entry.(*data.CORSConfiguration) if !ok { o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)), zap.String("expected", "*data.CORSConfiguration")) return nil } return result } func (o *SystemCache) GetSettings(key string) *data.BucketSettings { entry, err := o.cache.Get(key) if err != nil { return nil } result, ok := entry.(*data.BucketSettings) if !ok { o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)), zap.String("expected", "*data.BucketSettings")) return nil } return result } func (o *SystemCache) GetNotificationConfiguration(key string) *data.NotificationConfiguration { entry, err := o.cache.Get(key) if err != nil { return nil } result, ok := entry.(*data.NotificationConfiguration) if !ok { o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)), zap.String("expected", "*data.NotificationConfiguration")) return nil } return result } // PutObject puts an object to cache. func (o *SystemCache) PutObject(key string, obj *data.ObjectInfo) error { return o.cache.Set(key, obj) } func (o *SystemCache) PutCORS(key string, obj *data.CORSConfiguration) error { return o.cache.Set(key, obj) } func (o *SystemCache) PutSettings(key string, settings *data.BucketSettings) error { return o.cache.Set(key, settings) } func (o *SystemCache) PutNotificationConfiguration(key string, obj *data.NotificationConfiguration) error { return o.cache.Set(key, obj) } // Delete deletes an object from cache. func (o *SystemCache) Delete(key string) bool { return o.cache.Remove(key) }