ExponentialBackoffStrategy.php

<?php
 
namespace Guzzle\Plugin\Backoff;
 
use Guzzle\Http\Message\RequestInterface;
use Guzzle\Http\Message\Response;
use Guzzle\Http\Exception\HttpException;
 
class ExponentialBackoffStrategy extends AbstractBackoffStrategy
{
    public function makesDecision()
    {
        return false;
    }
 
    protected function getDelay($retries, RequestInterface $request, Response $response = null, HttpException $e = null)
    {
        return (int) pow(2, $retries);
    }
}