/**
* Returns the globally available instance of a CakeEventManager
* this is used for dispatching events attached from outside the scope
* other managers were created. Usually for creating hook systems or inter-class
* communication
*
* If called with a first params, it will be set as the globally available instance
*
* @param CakeEventManager $manager
* @return CakeEventManager the global event manager
*/
public static function instance($manager = null)
{
if ($manager instanceof CakeEventManager) {
self::$_generalManager = $manager;
}
if (empty(self::$_generalManager)) {
self::$_generalManager = new CakeEventManager();
}
self::$_generalManager->_isGlobal = true;
return self::$_generalManager;
}
