backoff

func Retry ¶

func Retry(attempts int, sleep time.Duration, f func() error, shouldRetry func(error) bool) error

Retry executes f up to attempts times with exponential backoff starting at sleep. It returns nil on the first successful attempt, or the last error if all attempts fail. The shouldRetry predicate decides whether a given error is retryable; if it returns false, Retry stops immediately and returns that error.