gcache

type Config struct {
	MaxMemoryUsage int64
	BlockSize      int64
	DiskCache      diskcache.Cache
	Hydrator       hydrator.Hydrator
	GroupName      string
	PeeringAddress string
	Etcd           []string
	PassThrough    []string
}

type Key struct {
	// required
	Url string

	// required if present
	ContentLength   uint64 `json:",omitempty"`
	ContentEncoding string `json:",omitempty"`

	// require only first.
	// last retrieved used as fallback
	// if last retrieved is set, always set to time.Now() to force expiration
	Etag          string `json:",omitempty"`
	Sha512        string `json:",omitempty"`
	Sha256        string `json:",omitempty"`
	Sha1          string `json:",omitempty"`
	Md5           string `json:",omitempty"`
	LastModified  string `json:",omitempty"`
	LastRetrieved string `json:",omitempty"`
}

type MetadataCache interface {
	Add(key string, cacheEntry hydrator.CacheEntry) error
	AddWithoutSync(key string, metadata hydrator.CacheEntry)
	Get(key string, clientHeaders http.Header) (*hydrator.CacheEntry, bool)
	Remove(key string)
	RemoveWithoutSync(key string)
	AddSync(syncer MetadataSyncer)
}

type MetadataRequest struct {
	Url     string
	Key     string
	Headers map[string]string
}

type MetadataSyncer interface {
	Add(key string, value hydrator.CacheEntry) error
	Remove(key string) error
	Sync()
}

type NotCacheable struct{}

type WriterReadSeeker interface {
	io.ReadSeeker
	io.WriterTo
}