<?php

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namespace Guzzle\Plugin\Backoff;

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use Guzzle\Common\Exception\InvalidArgumentException;

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use Guzzle\Http\Message\RequestInterface;

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use Guzzle\Http\Message\Response;

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use Guzzle\Http\Exception\HttpException;

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/**

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* Strategy that will invoke a closure to determine whether or not to retry with a delay

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*/

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class CallbackBackoffStrategy extends AbstractBackoffStrategy

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{

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/** @var \Closure|array|mixed Callable method to invoke */

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protected $callback;

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/** @var bool Whether or not this strategy makes a retry decision */

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protected $decision;

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/**

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* @param \Closure|array|mixed $callback Callable method to invoke

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* @param bool $decision Set to true if this strategy makes a backoff decision

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* @param BackoffStrategyInterface $next The optional next strategy

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*

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* @throws InvalidArgumentException

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*/

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public function __construct($callback, $decision, BackoffStrategyInterface $next = null)

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{

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if (!is_callable($callback)) {

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throw new InvalidArgumentException('The callback must be callable');

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}

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$this->callback = $callback;

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$this->decision = (bool) $decision;

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$this->next = $next;

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}

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public function makesDecision()

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{

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return $this->decision;

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}

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protected function getDelay($retries, RequestInterface $request, Response $response = null, HttpException $e = null)

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{

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return call_user_func($this->callback, $retries, $request, $response, $e);

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}

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}

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