cache

type Config struct {
	CacheSize  int64
	MaxEntry   int64
	CacheMedia string
}

type FileCachePool interface {
	// GetLen fetch value length if hit
	GetLen(path string) (int64, bool)
	// PutLen set value length
	PutLen(path string, length int64) bool
	// GetOrRefill try to fetch cache value, call `fetch` if not hit
	GetOrRefill(path string, offset int64, count int, fetch func() ([]byte, error)) ([]byte, error)
	// GetHost get P2P Host for key
	GetHost(path string) (string, bool)
	// PutHost store P2P Host for key
	PutHost(path string, host string) bool
	// DelHost clear P2P Host for key
	DelHost(path string)
}