<?php
/**
 * Copyright (c) 2009, RealDolmen
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of RealDolmen nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY RealDolmen ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL RealDolmen BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   Microsoft
 * @package    Microsoft
 * @copyright  Copyright (c) 2009, RealDolmen (http://www.realdolmen.com)
 * @license    http://phpazure.codeplex.com/license
 */

namespace Akeeba\Engine\Postproc\Connector\Azure\Retrypolicy;

// Protection against direct access
defined('AKEEBAENGINE') or die();

use Akeeba\Engine\Postproc\Connector\Azure\Retrypolicy;
use Akeeba\Engine\Postproc\Connector\Azure\Exception\Retrypolicy as RetrypolicyException;

/**
 * @category   Microsoft
 * @package    Microsoft_WindowsAzure
 * @subpackage RetryPolicy
 * @copyright  Copyright (c) 2009, RealDolmen (http://www.realdolmen.com)
 * @license    http://phpazure.codeplex.com/license
 */
class Ntimes extends Retrypolicy
{
	/**
	 * Number of retries
	 *
	 * @var int
	 */
	protected $_retryCount = 1;

	/**
	 * Interval between retries (in milliseconds)
	 *
	 * @var int
	 */
	protected $_retryInterval = 0;

	/**
	 * Constructor
	 *
	 * @param int $count                  Number of retries
	 * @param int $intervalBetweenRetries Interval between retries (in milliseconds)
	 */
	public function __construct($count = 1, $intervalBetweenRetries = 0)
	{
		$this->_retryCount = $count;
		$this->_retryInterval = $intervalBetweenRetries;
	}

	/**
	 * Execute function under retry policy
	 *
	 * @param string|array $function   Function to execute
	 * @param array        $parameters Parameters for function call
	 *
	 * @return mixed
	 *
	 * @throws RetrypolicyException
	 */
	public function execute($function, $parameters = array())
	{
		$returnValue = null;

		for ($retriesLeft = $this->_retryCount; $retriesLeft >= 0; --$retriesLeft)
		{
			try
			{
				$returnValue = call_user_func_array($function, $parameters);

				return $returnValue;
			}
			catch (\Exception $ex)
			{
				if ($retriesLeft == 1)
				{
					throw new RetrypolicyException("Exceeded retry count of " . $this->_retryCount . ". " . $ex->getMessage());
				}

				usleep($this->_retryInterval * 1000);
			}
		}
	}
}

