Ok I'll chime in here since I use FDS with Cairngorm. Examples taken from the first Flex 2.0 app we built.
First off we initialize the DS in the model that it relates too:
public class ConsumerModel {
public var consumerDS:DataService;
....
public function ConsumerModel() {
consumerDS = new DataService( "consumerDS" );
consumerDS.autoCommit = false;
// set other properties first
}
}
Then in the commands that we need to, we use the DS to perform the operations
that the command requires, as an example update:
public class SaveConsumerCmd {
public function execute( event:CairngormEvent ):void {
...
var token:AsynToken = ConsumerModel.getInstance().consumerDS.commit();
token.addResponders( this );
}
}
Now the examples are simple, but working with a DataService and a RemoteObject
is different. So I don't use delegates, but because u can set responders for
each operation, thus u can have every command handle each DataService operation
as it sees fit.
Hope that helps,
Dimitrios Gianninas
Optimal Payments Inc.
-----Original Message-----
From: flexcoders@yahoogroups.com on behalf of billy_d_white
Sent: Mon 2/26/2007 4:49 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Cairngorm FDS Sample
So far I'm finding that using FDS mixed with Cairngorm is pretty
difficult.
1. When I define my services in the services.xml file, if I specify
'autoSyncEnabled' in the XML declaration, it throws a null pointer
exception. It looks to me like things are getting initialized out of
order.
2. I've had to specify fault handlers in the services.xml file if you
want to user 'fault' attributes in the service declaration tags. If I
do not do this, then some errors do not get handled at all, even if I
have a fault handler method declared correctly on my responder (ie my
calling command)
3. Many of the solutions I read about on this forum that show how to
handle calls to the backend in FDS are not easily applied to a
Cairngorm structure. For example, it is hard to call
service.revertChanges in my fault routine because my fault handler
method is in my command object and the service call is made in my
delegate object. I have to create a reference to the service using
the ServiceLocator solely to call revertChanges in the event of a fault.
Anyone else experience these problems using FDS and Cairngorm
together? If not, I'd love to see some examples showing me what I'm
doing wrong.
Thanks
--- In flexcoders@yahoogroups.com, "auddaraj" <[EMAIL PROTECTED]> wrote:
>
> Thanks for getting back & posting your sample, Jeff.
> Yes Cairngorm store uses remoteobject which requires FDS, however
> they don't make you data management services. I would be intersted
> if any one might have any tips or sample app using data management
> services with Cairngorm.
>
>
> --- In flexcoders@yahoogroups.com, Jeffry Houser <jeff@> wrote:
> >
> >
> > I thought that any use of RemoteObject was accessing Flex Data
> > Services (or a ColdFusion server). The Cairngorm Store 2.1 uses
> > RemoteObject and therefore must be using Flex Data Services.
> >
> > I also converted the Cairngorm Store to work with a CF backend
> if
> > anyone is interested, download are more details are here:
> > http://www.jeffryhouser.com/index.cfm/2007/2/19/Learning-Cairngorm-
> Part-3 .
> >
> > At 02:53 PM 2/26/2007, you wrote:
> >
> > >Hi,
> > >We are planning to use Cairngorm in our flex project which uses
> FDS. I
> > >tried looking around for samples that use FDS(not remoting) but no
> > >luck. From www.cairngormdocs.org I am able to find number of
> sample
> > >that use webservices, remoting etc..
> > >
> > >Can anyone suggest a sample Cairngorm app that uses FDS(Data
> > >services). I am trying to see how FDS methods like fill etc. fit
> into
> > >cairngorm model
> > >
> > >Thanks,
> > >ANAND.
> >
> >
> > --
> > Jeffry Houser, Software Developer, Writer, Songwriter, Recording
> Engineer
> > AIM: Reboog711 | Phone: 1-203-379-0773
> > --
> > My Company: <http://www.dot-com-it.com>
> > My Podcast: <http://www.theflexshow.com>
> > My Blog: <http://www.jeffryhouser.com>
> > Connecticut Macromedia User Group: <http://www.ctmug.com>
> >
>
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