/**
* it cleans cache
*
*/
private function _cleanCache()
{
$dir = opendir($this->_path);
$fileList = new FileList();
while (false !== ($fileName = readdir($dir))) {
if ($fileName != '.' && $fileName != '..') {
$fileList->add($this->_path . '/' . $fileName);
}
}
$fileList->deleteOldest(self::$numberOfFilesToDelete);
}
