readcaching

func NewDownloader ¶

func NewDownloader[TReference object.BasicReference, TLeaseFast any](slow object.Downloader[TReference], fast object.Store[object.FlatReference, TLeaseFast]) object.Downloader[TReference]

NewDownloader creates a decorator for object.Downloader that adds read caching.

Read requests first go to a fast backend. If that backend returns NOT_FOUND, the data is read from the slow backend and written into the fast backend prior to returning.

Writes always go to the fast backend.