Retry

Simple and easy retry mechanism package for Go

Installation

Install the package using

$ go get github.com/thedevsaddam/retry

Usage

To use the package import it in your *.go code

import "github.com/thedevsaddam/retry"

Example

Simply retry a function to execute for max 10 times with interval of 1 second

package main

import (
	"fmt"
	"time"

	"github.com/thedevsaddam/retry"
)

func main() {
	i := 1 // lets assume we expect i to be a value of 8
	err := retry.DoFunc(10, 1*time.Second, func() error {
		fmt.Printf("trying for: %dth time\n", i)
		i++
		if i > 7 {
			return nil
		}
		return fmt.Errorf("i = %d is still low value", i)
	})

	if err != nil {
		panic(err)
	}

	fmt.Println("Got our expected result: ", i)
}

We can execute function from other package with arguments and return values

package main

import (
	"errors"
	"log"
	"time"

	"github.com/thedevsaddam/retry"
)

func div(a, b float64) (float64, error) {
	if b == 0 {
		return 0, errors.New("Can not divide by zero")
	}
	return a / b, nil
}

func main() {
	a := 20.6
	b := 3.7 // if we assign 0.0 to b, it will cause an error and will retry for 3 times
	res, err := retry.Do(3, 5*time.Second, div, a, b)
	if err != nil {
		panic(err)
	}
	log.Println(res)
}

Contribution

If you are interested to make the package better please send pull requests or create an issue so that others can fix. Read the contribution guide here.

License

The retry is an open-source software licensed under the MIT License.