/**
* set cache
*/
protected function _setCache()
{
if (null === self::$_cache) {
$frontendOptions = array('lifeTime' => 3600, 'automatic_serialization' => true);
$backendOptions = array('cache_dir' => SP_APP_PATH . '/cache/');
self::$_cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
}
}
