44 linhas
1 KiB
Go
44 linhas
1 KiB
Go
package backoff
|
|
|
|
// LinearBackOff is a back-off policy whose back-off time is multiplied by mult and incremented by incr
|
|
// each time it is called.
|
|
// mult can be one ;).
|
|
import "time"
|
|
|
|
// grows linearly until
|
|
type LinearBackOff struct {
|
|
InitialInterval time.Duration
|
|
Multiplier float64
|
|
Increment time.Duration
|
|
MaxInterval time.Duration
|
|
currentInterval time.Duration
|
|
}
|
|
|
|
var _ Interface = (*LinearBackOff)(nil)
|
|
|
|
func NewLinear(from, to, incr time.Duration, mult float64) *LinearBackOff {
|
|
return &LinearBackOff{
|
|
InitialInterval: from,
|
|
MaxInterval: to,
|
|
currentInterval: from,
|
|
Increment: incr,
|
|
Multiplier: mult,
|
|
}
|
|
}
|
|
|
|
func (lb *LinearBackOff) Reset() {
|
|
lb.currentInterval = lb.InitialInterval
|
|
}
|
|
|
|
func (lb *LinearBackOff) increment() {
|
|
lb.currentInterval = time.Duration(float64(lb.currentInterval) * lb.Multiplier)
|
|
lb.currentInterval += lb.Increment
|
|
if lb.currentInterval > lb.MaxInterval {
|
|
lb.currentInterval = lb.MaxInterval
|
|
}
|
|
}
|
|
|
|
func (lb *LinearBackOff) BackOff() {
|
|
time.Sleep(lb.currentInterval)
|
|
lb.increment()
|
|
}
|