In the PureMVC framework, Proxies communicate with the ApplicationFacade (and thus any interested components) via a Notification. Should this Notification be sent via their own instance, or the Singleton instance of the ApplicationFacade? Frankly, does it matter?
Here are two ways of doing this (in Flex/AS):
// from the proxy itself
this.sendNotification(ApplicationFacade.NOTIFY_ALL);
// via the ApplicationFacade instance
ApplicationFacade.getInstance().notifyObservers(new Notification(ApplicationFacade.NOTIFY_ALL));
The second method looks more verbose and less intuitive to me. Moreover, the Proxy has the ability to send Notifications, which, in my mind, means it probably should. Are there instances where the Proxy should only send a Notification via the ApplicationFacade instance?