Go constant backoff retry with max iterations count

main.go

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package main

import (
	"errors"
	"fmt"
	"time"

	"github.com/cenkalti/backoff"
)

type ConstantBackOff struct {
	Interval time.Duration
	count    int
	maxCount int
}

func (b *ConstantBackOff) Reset() {}
func (b *ConstantBackOff) NextBackOff() time.Duration {
	b.count++
	if b.count >= b.maxCount {
		return backoff.Stop
	}

	return b.Interval
}

func NewConstantBackOff(d time.Duration) *ConstantBackOff {
	return &ConstantBackOff{Interval: d, maxCount: 10}
}

func main() {
	// An operation that may fail.
	operation := func() error {
		fmt.Println("trying")
		return errors.New("oops")
	}

	err := backoff.Retry(operation, NewConstantBackOff(time.Second*3))
	if err != nil {
		fmt.Printf("got error: %s\n", err)
		return
	}

	// Operation is successful.
}