func invalidateCache(req *wcg.Request, kind *Kind, cache *memcache.Driver, keys ...string) { if err := cache.DeleteMulti(keys); memcache.IsMemcacheError(err) { req.Logger.Warnf("[%s] Could not delete from cache (keys=%v): %v", kind, keys, err) } else { req.Logger.Debugf("[%s] Invalidated entities cache (keys=%v)", kind, keys) } }