Jeff, which version of Flex are you using? Can you make a test case in two 20-line mxml files?
Alex Harui Flex SDK Developer Adobe Systems Inc.<http://www.adobe.com/> Blog: http://blogs.adobe.com/aharui From: [email protected] [mailto:[email protected]] On Behalf Of Battershall, Jeff Sent: Friday, April 24, 2009 11:57 AM To: [email protected] Subject: RE: [flexcoders] Unloading Modules - Binding is the Enemy? Gregor, It does seem to be connected to the ComboBox issue - is this in the Adobe BugBase? It doesn't turn up in my searches. I can get the reference to release if I navigate to another module and then logout, but if I change the selected index of the combo box to greater than -1 before that, it will not release no matter what I do. This is a royal PITA because my instantiation code is based upon a first time load of the module and if I cannot unload a module then my method of injecting model objects into my module will have to be re-done. If there's no workaround for this bug, then Modules are effectively broken if something as commonplace as a combobox prevents an unload. Jeff -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Battershall, Jeff Sent: Thursday, April 23, 2009 10:13 AM To: [email protected] Subject: RE: [flexcoders] Unloading Modules - Binding is the Enemy? Gregor, Very interesting indeed. If I login, load the module, interact with the combobox, logout, the instance remains in the profiler. However if I do all that and THEN load another module and logout, the number of instances of the first module goes to zero. These modules are being loaded into a ViewStack, BTW. Is this the FocusManager bug you described? Is there a workaround? I'd be thrilled to discover that Binding was not the culprit here. Jeff -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Gregor Kiddie Sent: Thursday, April 23, 2009 9:40 AM To: [email protected] Subject: RE: [flexcoders] Unloading Modules - Binding is the Enemy? It does sound like you are describing the bug where the focus manager holds onto the reference of the combo box and stops the module unloading... If you lose the combobox focus, does the module unload? Gk. Gregor Kiddie Senior Developer INPS Tel: 01382 564343 Registered address: The Bread Factory, 1a Broughton Street, London SW8 3QJ Registered Number: 1788577 Registered in the UK Visit our Internet Web site at www.inps.co.uk<blocked::http://www.inps.co.uk/> The information in this internet email is confidential and is intended solely for the addressee. Access, copying or re-use of information in it by anyone else is not authorised. Any views or opinions presented are solely those of the author and do not necessarily represent those of INPS or any of its affiliates. If you are not the intended recipient please contact [email protected] ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Battershall, Jeff Sent: 23 April 2009 14:32 To: [email protected] Subject: RE: [flexcoders] Unloading Modules - Binding is the Enemy? Thanks Pedro, I've seen what your describing in the docs - I'm looking at this via the profiler which is giving me feedback as to number of live instances, etc. Here's what I'm basing my statements on:. 1) I start up my app, which loads modules at runtime based upon user choice from a menu. 2) Module exectues Cairngorm Event/Command/Delegate to get array to populate a combo box. I'm passing a reference to the module's model in my Cairngorm event and the model is updated upon completion of the Command. 3) Combobox is bound (via MXML) to the model. 4) If I don't interact with the combobox, I can then logout and unload the module successfully. The profiler tells me there was previously 1 instance of the module and now there are zero instances. 5) If I make the combobox active (by interacting with it in any way), and then logout, the module remains in memory, with the profiler reporting one instance instead of zero. 6) If I then login again, the Profiler reports 2 active instances of the module. Note that any model objects are duplicated as well. For example, if my list of suppliers (used to popuate my combobox) (a strongly typed AS class) was previously 64, the profiler now reports there are 128 instances. There's my behavior. When my UI object (in this case ComboBox), becomes active, the binding becomes active and then the module will not unload, even if I set the modules model to null before attempting to unload. It would appear that I need to invalidate all outstanding bindings to any data object before the module will fully unload. This would seem to indicate that MXML binding (via curly braces) isn't going to allow this. Jeff
