Setting the WebServiceWrapper endpointURI at run time

I'm in the middle of switching from Flex Builder 3 to Flash Builde开发者_JAVA百科r 4, and one of the problems I have run into is that support for web services in 4 is substantially different. In both IDE's I am able to import a WSDL for my web service and it will generate the appropriate client classes for communicating with the service. The generated code in each is different.

In my Flex3 code I was able to access the endpointURI property of the mx.rpc.soap.AbstractWebService, but in the Flex4 code that is generated, the new class extends com.adobe.fiber.services.wrapper.WebServiceWrapper which does not have the endpointURI property.

My project has mulitple game servers and the player picks which server they want to play on. In the past if the player wanted server 1, I would set the endpoint URI to http://game1.server.com/service.asmx, and like wise if they wanted server 2 I would set the endpoint to http://game2.server.com/service.asmx.

What am I looking for to accomplish this in Flash Builder 4?

Short Answer:

var s:ClassThatExtendsWebServiceWrapper = new ClassThatExtendsWebServiceWrapper;
s.serviceControl.endpointURI = 'http://service.com/service.asmx';

Long Answer:

Well I finally found a solution. Adobe seems to have made this much harder than it should have been.

Web Service classes that are generated by Flash Builder 4 extend the com.adobe.fiber.services.wrapper.WebServiceWrapper. WebServiceWrapper has a property called serviceControl that can be used to control the service. The problem is that not all the members of serviceControl are accessible at the application code level. Lets assume that I have a web service called GameService. When I use the data tool to connect to the web service by providing a WSDL, Flash Builder will create two classes for me automcatically.

internal class _Super_GameService extends 
com.adobe.fiber.services.wrapper.WebServiceWrapper
{ ... }

public class GameService extends _Super_GameService
{}

_Super_GameService contains all the automatically generated code to make calls to the web service. GameService contains no code itself, but unlike _Super_GameService, it is public. The idea here is that any enhancements that we need to make can be made to GameService, then later on if we need to update, _Super_GameService can be regenerated, but out changes to GameService will not be overwritten by the code generation tool.

Now this leads us to usage of these generated classes. Typically all I should have to do is create an instance of GameService and call a method on it. In this example DoSomethingAwesome is a method available on the web service.

var gs:GameService = new GameService();
var token:AsyncToken = gs.DoSomethingAwesome();

Now this will call the service using the URI of the service specified in the WSDL file. In my situation I wanted GameService to connect to a different URI. This should have been simple, but things fell apart.

My first problem was that viewing the documentation on WebServiceWrapper (http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/com/adobe/fiber/services/wrapper/WebServiceWrapper.html) did not render properly in Firefox. So when I was reading the documentation I wasn't getting the full picture. This really needs to be fixed by Adobe.

Viewing the documentation in another browser helped me find out about the serviceControl property of WebServiceWrapper. serviceControl is declared as a mx.rpc.soap.AbstractWebService. AbstractWebService does have an endpointURI property which makes the following code valid.

var gs:GameService = new GameService();
gs.serviceControl.endpointURI = 'http://game1.service.com/GameService.asmx';

The other problem I had is that for some reason the endpointURI property of serviceControl does not appear in the Intellisense context menu. So since I didn't see serviceControl in the online documentation at first, and I didn't see endpointURI in intellisense, I didn't realize the property was there to be set.

If you look at the source for AbstractWebserivce, (http://opensource.adobe.com/svn/opensource/flex/sdk/trunk/frameworks/projects/rpc/src/mx/rpc/soap/AbstractWebService.as) there doesn't seem to be an Exclude tag to explain why endpointURI does not appear in the Intellisense context menu. So I don't know what is going on there.

You should be able to override the endpointURI on the WebService. But I'm not sure where to do that with the generated code since I use <s:WebService/>.

This is the only way I could get it to work, in the generated stub for your service:

import com.adobe.fiber.core.model_internal;

Also:

    /**
 * Override super.init() to provide any initialization customization if needed.
 */
protected override function preInitializeService():void
{           
    _needWSDLLoad = false; // to prevent loading the default WSDL
    super.preInitializeService();
    // Initialization customization goes here
    wsdl = "http://localhost/yourservice?wsdl";
    _needWSDLLoad = true;
    model_internal::loadWSDLIfNecessary();