Hi all, I'm working on an API to allow developers to write apps which connect to an AMFPHP service. For security reasons, we're placing all the code that actually deals directly with the service in a connector SWF which sits on our server and is loaded in the developer's app by a loader class which loads the connector and provides an interface to it.
An architecture decision has been made to use callback functions to get messages back to classes in the app, so when the connector receives messages from the service, it calls callback methods in any object which has registered itself as a listener (It also dispatches events like a proper implementation should, but these callbacks are a legacy hangover from the AS2 version. Y'all know how it is ;) ). To this end, I've defined two interfaces: IAPIConnector, which defines the available methods on the single class in the connector SWF, and IAPIListener, which defines the callbacks which should be present in a listening class. Classes make calls through a variable in the connector class cast as IAPIConnector, and the connector calls methods on objects cast as IAPIListener. This way, neither the loader contains any imported connector code (just the interface definition) and vice versa. This works as expected when both SWF files are on the local filesystem, but when I attempt to load the Connector from a remote location, I get errors along these lines: TypeError: Error #1034: Type Coercion failed: cannot convert api.test::[EMAIL PROTECTED] to api.interfaces.IAPIListener. (when passing a listener class [which definitely does implement IAPIListener] to the loaded connector class ) TypeError: Error #1034: Type Coercion failed: cannot convert api::[EMAIL PROTECTED] to api.interfaces.IAPIConnector. (when trying to cast an instance of the loaded connector class to IAPIConnector [ which it definitely does implement] in the loader class) This really has me scratching my head. My best guess is that there's some kind of ApplicationDomain weirdness going on which is causing both SWFs to have their own independent definitions of the Interfaces, and so therefore complaining when something from the other SWF, which implements its own definition of the interface, is passed through. I am, however, explicitly using a LoaderContext to load the connector into a child of the current ApplicationDomain, like so: $loader = new Loader(); $loader.contentLoaderInfo.addEventListener( Event.COMPLETE, onAPILoaded ); var cxt:LoaderContext = new LoaderContext(); cxt.applicationDomain =new ApplicationDomain( ApplicationDomain.currentDomain ) $loader.load( new URLRequest( swfUrl ), cxt ); And if that was wrong, surely it wouldn't work locally either? It's driving me mental! Any insights very gratefully received, Henry _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
