<?php
/**
* This file is part of the PHP Video Toolkit v2 package.
*
* @author Oliver Lillie (aka buggedcom) <publicmail@buggedcom.co.uk>
* @license Dual licensed under MIT and GPLv2
* @copyright Copyright (c) 2008-2014 Oliver Lillie <http://www.buggedcom.co.uk>
* @package PHPVideoToolkit V2
* @version 2.1.7-beta
* @uses ffmpeg http://ffmpeg.sourceforge.net/
*/
namespace PHPVideoToolkit;
/**
* @access public
* @author Oliver Lillie
* @package default
*/
abstract class CacheAbstract implements CacheInterface
{
protected $_config;
protected $_key_prefix = 'phpvideotoolkit_v2';
public function __construct(Config $config=null)
{
$this->_config = $config === null ? Config::getInstance() : $config;
if($this->isAvailable() === false)
{
$class_name = get_class($this);
throw new Exception('The cache driver `'.substr($class_name, strrpos($class_name, '_')+1).'` is not available on your system.');
}
}
public function set($key, $value, $expiration=null)
{
$this->_cache[$key] = $value;
return $this->_set($this->_key_prefix.'_'.$key, $value, $expiration);
}
public function get($key, $default_value=null)
{
$key = $this->_key_prefix.'_'.$key;
if($this->_isMiss($key) === true)
{
return $default_value;
}
return $this->_get($key);
}
abstract protected function _get($key);
abstract protected function _isMiss($key);
abstract protected function _set($key, $value, $expiration=null);
}
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