using_retry_with_decorator.go

type ReaderRetryDecorator struct {
	reader IReader
}

func (d ReaderRetryDecorator) ReadWithRetry(ctx context.Context, retryAttempts int) error {
	var err error
	for i := 0; i < retryAttempts; i++ {
		select {
		case <-ctx.Done():
			return ctx.Err()
		default:
		}
		err := d.reader.Read()
		if err == nil {
			return nil
		}
	}
	return err
}

func main() {
	retryReader := ReaderRetryDecorator{Reader{}}
	retryReader.ReadWithRetry(context.Background(), 3)
}