Asynchronous methods like fill() return an AsyncToken instance which you
can use to add custom data to it (i.e. mark that ypu invoked a fill operation).
In the result handling function the AsyncToken is available again, so you can
add additional logic to your result handler, e.g.
private function
resultHandler(event:ResultEvent):void
{
switch (event.token.kind)
{
case "fill":
...
case "delete":
...
}
}
AsyncToken is a dynamic class so you can add whatever properties you
like.
Another use case of AsyncToken is to add responders to it - this allows
you to dynamically setup result/fault handling functions:
var
token:AsyncToken = ds.fill(collection);
token.addResponder(new ItemResponder(resultFunction, faultFunction,
"fill"));
and
then
private function resultFunction(result:Object,
token:Object):void
{
// result usually is of type ResultEvent,
// token is the third parameter passed to the ItemResponder
constructor
if (result is ResultEvent)
{
...
}
}
private function faultFunction(result:Object,
token:Object):void
{
// result usually is of type FaultEvent,
// token is the third parameter passed to the ItemResponder
constructor
if (result is FaultEvent)
{
...
}
}
Dirk.
From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Jonas
WindeySent: Wednesday, August 09, 2006 11:30 AMTo:
flexcoders@yahoogroups.comSubject: [flexcoders] Flex dataservices:
fill vs asynctoken
Hi,
Im new to flex dataservices
(using WebORB), and I like to know whats the difference
between:
ds = new
DataService("contact");
ds.fill(contacts);
and
ds = new
DataService("contact");
var token:AsyncToken =
AsyncToken(ds.fill(contacts));
token.kind =
"fill";
Thanks!
Jonas
Jonas
Windey
Web
Developer
T. +32 3 216 86
47
Pixco Interactive
Division
T. +32 3 216 86
40
F. +32 3 216 86
49
http://www.pixco.com
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