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<?php
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 3.6.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Core\Retry;
use Exception;
/**
* Allows any action to be retried in case of an exception.
*
* This class can be parametrized with a strategy, which will be followed
* to determine whether or not the action should be retried.
*/
class CommandRetry
{
/**
* The strategy to follow should the executed action fail.
*
* @var \Cake\Core\Retry\RetryStrategyInterface
*/
protected $strategy;
/**
* The number of retries to perform in case of failure.
*
* @var int
*/
protected $retries;
/**
* Creates the CommandRetry object with the given strategy and retry count
*
* @param \Cake\Core\Retry\RetryStrategyInterface $strategy The strategy to follow should the action fail
* @param int $retries The number of times the action has been already called
*/
public function __construct(RetryStrategyInterface $strategy, $retries = 1)
{
$this->strategy = $strategy;
$this->retries = $retries;
}
/**
* The number of retries to perform in case of failure
*
* @param callable $action The callable action to execute with a retry strategy
* @return mixed The return value of the passed action callable
*/
public function run(callable $action)
{
$retryCount = 0;
$lastException = null;
do {
try {
return $action();
} catch (Exception $e) {
$lastException = $e;
if (!$this->strategy->shouldRetry($e, $retryCount)) {
throw $e;
}
}
} while ($this->retries > $retryCount++);
if ($lastException !== null) {
throw $lastException;
}
}
}