/**
* Returns an instance of the distributed cache driver
*
* @return Pfw_Cache|null instance of a Pfw_Cache object or null if none
* is configured
*/
public static function getInstance()
{
if (!is_null(self::$instance)) {
return self::$instance;
}
if (null == ($dist_cache = Pfw_Config::get('dist_cache'))) {
return null;
}
if (is_array($dist_cache)) {
$class = $dist_cache['class'];
unset($dist_cache['class']);
$options = $dist_cache;
} else {
$class = $dist_cache;
$options = array();
}
Pfw_Loader::loadClass($class);
self::$instance = new $class($options);
return self::$instance;
}
