Exponential backoff sample code written in Go.

main.go

package main

import (
	"fmt"
	"math/rand"
	"time"

	"github.com/cenkalti/backoff/v4"
)

const (
	MaxElapsedTime = 15 * time.Minute
	MaxInterval    = 120 * time.Second
	JitterRange    = 5
)

func fail() error {
	// Sample code that would normally make the request
	// to the api would go here.
	return fmt.Errorf("request failed")
}

func main() {
	// jitter the initial interval
	rand.Seed(time.Now().UnixNano())
	randomJitter := rand.Intn(JitterRange) + 1

	// override default values for NewExponentialBackOff()
	exp := backoff.NewExponentialBackOff()
	exp.MaxElapsedTime = MaxElapsedTime
	exp.InitialInterval = time.Duration(randomJitter) * time.Second
	exp.MaxInterval = MaxInterval

	// notify function that will log when an error occurs.
	notify := func(err error, time time.Duration) {
		fmt.Printf("connection error %+v, retrying in %s\n", err, time)
	}
	// connect function that will run our request code.
	connect := func() error {
		return fail()
	}

	// backoff.RetryNotify() call that brings it altogether and handles the backoff.
	err := backoff.RetryNotify(connect, exp, notify)

	if err != nil {
		fmt.Printf("backoff %+v\n", err)
	}
}