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57 lines
1.0 KiB
57 lines
1.0 KiB
package retry
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import "time"
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type BackoffStrategy int
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const (
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StrategyConstant BackoffStrategy = iota
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StrategyLinear
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StrategyFibonacci
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)
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type Strategy interface {
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Sleep(times int) time.Duration
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}
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type Constant struct {
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startInterval time.Duration
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}
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func NewConstant(d time.Duration) *Constant {
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return &Constant{startInterval: d}
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}
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type Linear struct {
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startInterval time.Duration
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}
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func NewLinear(d time.Duration) *Linear {
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return &Linear{startInterval: d}
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}
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type Fibonacci struct {
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startInterval time.Duration
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}
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func NewFibonacci(d time.Duration) *Fibonacci {
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return &Fibonacci{startInterval: d}
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}
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func (c *Constant) Sleep(_ int) time.Duration {
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return c.startInterval
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}
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func (l *Linear) Sleep(times int) time.Duration {
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return l.startInterval * time.Duration(times)
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}
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func (f *Fibonacci) Sleep(times int) time.Duration {
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return f.startInterval * time.Duration(fibonacciNumber(times))
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}
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func fibonacciNumber(n int) int {
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if n == 0 || n == 1 {
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return n
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}
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return fibonacciNumber(n-1) + fibonacciNumber(n-2)
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}
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