errcode

pkg/utils/retry/stratey.go

@@ -0,0 +1,56 @@
+package retry
+
+import "time"
+
+type BackoffStrategy int
+
+const (
+	StrategyConstant BackoffStrategy = iota
+	StrategyLinear
+	StrategyFibonacci
+)
+
+type Strategy interface {
+	Sleep(times int) time.Duration
+}
+type Constant struct {
+	startInterval time.Duration
+}
+
+func NewConstant(d time.Duration) *Constant {
+	return &Constant{startInterval: d}
+}
+
+type Linear struct {
+	startInterval time.Duration
+}
+
+func NewLinear(d time.Duration) *Linear {
+	return &Linear{startInterval: d}
+}
+
+type Fibonacci struct {
+	startInterval time.Duration
+}
+
+func NewFibonacci(d time.Duration) *Fibonacci {
+	return &Fibonacci{startInterval: d}
+}
+
+func (c *Constant) Sleep(_ int) time.Duration {
+	return c.startInterval
+}
+func (l *Linear) Sleep(times int) time.Duration {
+	return l.startInterval * time.Duration(times)
+
+}
+func (f *Fibonacci) Sleep(times int) time.Duration {
+	return f.startInterval * time.Duration(fibonacciNumber(times))
+
+}
+func fibonacciNumber(n int) int {
+	if n == 0 || n == 1 {
+		return n
+	}
+	return fibonacciNumber(n-1) + fibonacciNumber(n-2)
+}