// readExpBackoffConfig handles the internal logic of determining what the // backoff policy is. By default if no information is available, NoBackoff. // TODO Generalize this see #17727 . func readExpBackoffConfig() BackoffManager { backoffBase := os.Getenv(envBackoffBase) backoffDuration := os.Getenv(envBackoffDuration) backoffBaseInt, errBase := strconv.ParseInt(backoffBase, 10, 64) backoffDurationInt, errDuration := strconv.ParseInt(backoffDuration, 10, 64) if errBase != nil || errDuration != nil { return &NoBackoff{} } else { return &URLBackoff{ Backoff: util.NewBackOff( time.Duration(backoffBaseInt)*time.Second, time.Duration(backoffDurationInt)*time.Second)} } }
// Disable makes the backoff trivial, i.e., sets it to zero. This might be used // by tests which want to run 1000s of mock requests without slowing down. func (b *URLBackoff) Disable() { glog.V(4).Infof("Disabling backoff strategy") b.Backoff = util.NewBackOff(0*time.Second, 0*time.Second) }