https://github.com/vvatanabe/goretryer

Retry exponential backoff algorithm in Go. Generalized HTTP Request retry logic in aws/aws-sdk-go.
https://github.com/vvatanabe/goretryer

exponential-backoff golang retry

Last synced: 24 days ago
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Retry exponential backoff algorithm in Go. Generalized HTTP Request retry logic in aws/aws-sdk-go.

• Host: GitHub
• URL: https://github.com/vvatanabe/goretryer
• Owner: vvatanabe
• License: mit
• Created: 2020-01-18T03:29:46.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-01-26T10:18:02.000Z (almost 5 years ago)
• Last Synced: 2024-05-21T12:38:01.183Z (6 months ago)
• Topics: exponential-backoff, golang, retry
• Language: Go
• Homepage:
• Size: 5.86 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# goretryer

Retry exponential backoff algorithm in Go. Generalized HTTP Request retry logic in [aws/aws-sdk-go](https://github.com/aws/aws-sdk-go).

## Requires

- Go 1.13+

## Installation

This package can be installed with the go get command:

```

$ go get github.com/vvatanabe/goretryer

```

## Usage

### Basically

```go

package main

import (

	"context"

	"errors"

	"github.com/vvatanabe/goretryer/exponential"

	"log"

	"time"

)

var ErrTemporary = errors.New("temporary")

func main() {

	log.SetFlags(log.Lmicroseconds)

	retryer := exponential.Retryer{

		NumMaxRetries: 5,

		MinRetryDelay: 300 * time.Millisecond,

		MaxRetryDelay: 300 * time.Second,

	}

	var cnt int

	operation := func(ctx context.Context) error {

		cnt++

		log.Println("cnt", cnt)

		return ErrTemporary

	}

	isErrorRetryable := func(err error) bool {

		return err == ErrTemporary

	}

	over, err := retryer.Do(context.Background(), operation, isErrorRetryable)

	if err != nil {

		log.Printf("retry over: %v, error: %v\n", over, err)

	}

}

```

## Acknowledgments

See [aws-sdk-go/aws/client/default_retryer.go](https://github.com/aws/aws-sdk-go/blob/84fbd57ef75762a07aade079776907d01be3891d/aws/client/default_retryer.go) for great origins.

## Bugs and Feedback

For bugs, questions and discussions please use the Github Issues.