--- In flexcoders@yahoogroups.com, Tom Chiverton <[EMAIL PROTECTED]> wrote:
> Oh, collery: Using FDS data-sync is a bad idea from this point of view, as it allows the app very fine grained access (i.e. at the level of tables) as opposed to a high level business process (create a user with these properties). I don't see a way to have FDS managed data-sync *and* proper control over what goes in the DB. < On the contrary the client side code of FDMS only manages changes to an object's properties and messages those changes to the server which processes them and sends the changes to other subscribed clients. This object is your transfer object (TO) which, typically represents only a portion of your server side domain model. This TO can contain logic or merely values (as in the value object or VO case). But, it is an object which typically represents something like a customer, user, or some complex object graph not merely a row in a DB table. It is the server side "assembler" that is responsible for reconciling the updates to these objects with the corresponding server model. This includes identifying conflicts or other data integrity constraints and faulting as appropriate. This "assembler" can contact any business process it needs to, typically a data access object layer. And it does support the notion of "create a user with these properties". The assembler is notified of each request from the client through a change object. This "assembler" is custom code that you write to run in a server side container. This gives the developer complete control over what is applied to the domain model on the server side (which could be persisted to a DB). A hibernate "assembler" is provided and can perform DB interactions directly but, its use is not enforced by FDMS, it is provided as a convenience. Hope that clears things up. jw -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/flexcoders/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
