/
Cache.php
100 lines (92 loc) · 2.4 KB
/
Cache.php
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<?PHP
/**
* Base class for all caches
*
* $Id$
*
* @package Services_Ebay
* @author Stephan Schmidt <schst@php.net>
*/
abstract class Services_Ebay_Cache
{
/**
* options of the cache
*
* @var array
*/
protected $options = array();
/**
* stores the expiry object
*
* @var object
*/
protected $expiry = null;
/**
* constructor
*
* @param array options for the cache
*/
public function __construct($options)
{
$this->options = $options;
}
/**
* load a model from cache
*
* @param string model type
* @param string primary key
* @param integer detail level
* @return array|boolean
*/
abstract public function load($Type, $Key, $DetailLevel);
/**
* store model data in the cache
*
* @param string model type
* @param string primary key
* @param integer detail level
* @param array properties
* @return boolean
*/
abstract public function store($Type, $Key, $DetailLevel, $Props);
/**
* set the expiry type
*
* Services_Ebay allows custom expiry objects to check the validity of
* a cached model.
* This enables you to create a cache lifetime depending of the
* end of the auction or the version number of a category listing.
*
* The following expiry types have been implemented:
* - Static
*
* @param string expiry type
* @param mixed parameters for the expiry
*/
public function setExpiry($type, $params)
{
$className = 'Services_Ebay_Cache_ExpiryCheck_' . $type;
$fileName = SERVICES_EBAY_BASEDIR . '/Ebay/Cache/ExpiryCheck/' . $type . '.php';
@include_once $fileName;
if (!class_exists($className)) {
throw new Services_Ebay_Exception('Unknown expiry check \''.$type.'\'.');
}
$this->expiry = new $className($params);
return true;
}
/**
* check the validity of the cache
*
* @param string type of the model
* @param integer time the cache has been created
* @param array model properties
*/
protected function isValid($Type, $ts, $props)
{
if (!is_object($this->expiry)) {
return true;
}
return $this->expiry->isValid($Type, $ts, $props);
}
}
?>