Hey All,
Re: Flex at Bell
I'm not sure about everyone else; my team has only just started getting
into it.
The part I don't understand though, is the Cairngorm 2.1 Store example
shows retrieving the service like this:
ServiceLocator.getInstance().getWebService("myService");
However, all of the services are configured in:
MyFunkyServiceLocator.mxml:
<cairngorm:ServiceLocator ... />
<mx:WebService id="myService" />
</cairngorm:ServiceLocator>
Does that not make MyFunkyServiceLocator a subclass of
com.adobe.cairngorm.business.ServiceLocator?
Why, if I define a parameter in an MXML file is it available to the
parent class via this? myService shouldn't (to me) belong to
ServiceLocator, it should belong to MyFunkyServiceLocator.
Jay Proulx
[EMAIL PROTECTED]
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Clint Modien
Sent: January 5, 2007 3:41 PM
To: [email protected]
Cc: Ben Lucyk
Subject: RE: [flexcoders] Cairngorm ServiceLocator
I'm assuming you've seen my second email by now but... the reason is
because you're calling the static ServiceLocator.getInstance() method.
<quote>
The ServiceLocator class is a singleton as well. You will only EVER
have one in your application so even though you are creating a subclass
as soon as you call getInstance() you will get the only instance there
is in your application. If you had two Services.mxml files
(Service1.mxml and Services2.mxml) in your app the last one created
would be the one returned by ServiceLocator.getInstance();
</quote>
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Friday, January 05, 2007 12:13 PM
To: [email protected]
Subject: RE: [flexcoders] Cairngorm ServiceLocator
I traced through the code, com.adobe.cairngorm.business.ServiceLocator
refers to itself as "this" when looking up a service:
private function getServiceForId( serviceId : String ) : Object
{
if ( this[ serviceId ] == null )
{
throw new CairngormError(
CairngormMessageCodes.NO_SERVICE_FOUND, serviceId );
}
return this[ serviceId ];
}
Except, in my case, there's no "projectService" associated with
com.adobe.cairngorm.business.ServiceLocator, I've specified it in a
Services.mxml file - How come I'm not running Services.getWebService()
instead of ServiceLocator.getWebService() ?
Jay Proulx
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Clint Modien
Sent: January 5, 2007 3:00 PM
To: [email protected]
Cc: Ben Lucyk
Subject: RE: [flexcoders] Cairngorm ServiceLocator
The code is opensource so you can see how it works... here's the call it
makes. (This is cairngorm v2)
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Friday, January 05, 2007 10:53 AM
To: [email protected]
Subject: [flexcoders] Cairngorm ServiceLocator
I'm a little confused.
How come I can ask com.adobe.cairngorm.business.ServiceLocator for a
service from an MXML component which is a "sub-class" of ServiceLocator?
i.e.:
Services.mxml:
<cairngorm:ServiceLocator ...>
<mx:WebService name="myService" ... />
</cairngorm:ServiceLocator>
var theService =
ServiceLocator.getInstance().getWebService("myService");
How does ServiceLocator know what a "myService" is? It's not defined in
ServiceLocator.as.
It works, I just don't understand why... What is the relationship
between an MXML file and an AS class that makes this happen?
Jay Proulx
Application Developer
Internet Delivery Services - eVision Team
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
(613) 783-6711
