retry

type Backoff struct {
	// Initial time to wait. A Backoff call will change this value.
	InitialBackoff time.Duration
	// Maximum time returned.
	MaxBackoff time.Duration
	// For a Linear backoff, InitialBackoff will be multiplied by Multiplier
	// after each call.
	Multiplier float64
}

type Config struct {
	// The operation will be retried until StartTimeout has elapsed. 0 means
	// forever.
	StartTimeout time.Duration

	// RetryDelay gives the time elapsed after a failure and before we try
	// again. Returns 2s by default.
	RetryDelay func() time.Duration

	// Max number of retries, 0 means infinite
	Tries int

	// ShouldRetry tells whether error should be retried. Nil defaults to always
	// true.
	ShouldRetry func(error) bool
}

type RetryExhaustedError struct {
	Err error
}