public static function getLog($className = null) {
		if (empty($className)) {
			$className = Common::read('Log.classname', 'CakeLog');
		}
		list($plugin, $className) = pluginSplit($className, true);

		$key = 'CommonLog';

		if (!ClassRegistry::isKeySet('CommonLog')) {
			App::uses($className, $plugin . 'Log');
			ClassRegistry::addObject('CommonLog', new $className);
		}

		$Log = ClassRegistry::getObject('CommonLog');

		return $Log;
	}