goretryer

Retry exponential backoff algorithm in Go. Generalized HTTP Request retry logic in 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

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 for great origins.

Bugs and Feedback

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