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need design hints for Managed class

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Steve_Pruitt
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Steve_Pruitt
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03-08-2010

I need help understanding the underlying LCDS mechanisms when a complex object hierarchy is managed in LCDS.  I have a custom Assembler because I have specialized persistence requirements.  My object hierarchy is basically the following:

Document

    Chapter

        Page

            Text

Document is the [Managed] class.  When a new Document is created, it is initialized with a Chapter.  Pages and Text are created when the document is edited.  I create new instance of Document and initialize it with an instance of Chapter.  On the client, I invoke the DataService using the createItem method.  My custom Assembler is called, I do the necessary persistence operation and return.  Back on the client I receive the ItemReference containing the AS Document.  This all works ok.  I am now faced with the runtime operations when the user starts creating Chapters, Pages and entering text.

Given that I start the editing session with a single ItemReference, I don't understand how to handle the Document sub-tree.  The LCDS documentation says the purpose of the [Managed] class tag is so the entire object tree does not need to be transmitted when a property changes on a child object.  Its the responsibility of the sub class to keep the remote object in sync.  But, I don't know the best way to go about doing this.

The [Managed] annotation makes the properties of the managed class bindable.  I can add an event listener to the ItemReference to handle property changes on the Document, but what about the rest of the object tree?    Do I explicitly make the properties of the child objects bindable?  Do I make each parent object an event listener for its child object properties and propagate the event up the tree?

Any suggestions or patterns to make this a little more understandable would be greatly appreciated.

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04-08-2010

Looking at Tour de Flex - Managing Associations and Lazy Loading...  The source code for Product, Account, Contact, etc. would be nice, so I can see how they are setup w/regard to handling the data services.  I assume these are all [Managed]?  Is the whole example downloadable from somewhere?