backoff

Documentation

Index

• Constants
• Variables
• type Backoff
  • func (b Backoff) DelayAfter(failedAttempts int) time.Duration
  • func (b Backoff) String() string

Examples

• Backoff

Constants

const InfiniteDelay time.Duration = 1000000000 * time.Second

Variables

var GoodBackoff = Backoff{
	ImmediateRetries: 1,

	FixedDelayRetries: 2,
	FixedDelay:        time.Second,

	BackoffRetries:  50,
	MaxBackoffDelay: time.Hour,
}

var NoBackoff = Backoff{}

var SlowBackoff = Backoff{
	FixedDelayRetries: 1,
	FixedDelay:        time.Second,

	MinBackoffDelay: 1 * time.Minute,
	BackoffRetries:  20,
	MaxBackoffDelay: 4 * time.Hour,
	BackoffFactor:   4,
}

Types

type Backoff

type Backoff struct {
	ImmediateRetries int

	FixedDelayRetries int
	FixedDelay        time.Duration

	BackoffRetries  int
	MinBackoffDelay time.Duration
	MaxBackoffDelay time.Duration
	BackoffFactor   float64
}

Example

b := Backoff{
	ImmediateRetries: 1,

	FixedDelayRetries: 2,
	FixedDelay:        time.Second,

	BackoffRetries:  10,
	MaxBackoffDelay: time.Minute,
}

for a := 1; a <= 15; a++ {
	s := b.DelayAfter(a).Seconds()
	fmt.Printf("after %2d failures delay is %.0f seconds\n", a, s)
}

Output:

after  1 failures delay is 0 seconds
after  2 failures delay is 1 seconds
after  3 failures delay is 1 seconds
after  4 failures delay is 2 seconds
after  5 failures delay is 4 seconds
after  6 failures delay is 8 seconds
after  7 failures delay is 16 seconds
after  8 failures delay is 32 seconds
after  9 failures delay is 60 seconds
after 10 failures delay is 60 seconds
after 11 failures delay is 60 seconds
after 12 failures delay is 60 seconds
after 13 failures delay is 60 seconds
after 14 failures delay is 1000000000 seconds
after 15 failures delay is 1000000000 seconds

func (Backoff) DelayAfter

func (b Backoff) DelayAfter(failedAttempts int) time.Duration

func (Backoff) String

func (b Backoff) String() string