Web Service Error handling in JDev 11g

Question

Hi,
I followed the steps on this tutorial: "Use JDeveloper 11g to Create a Data Control From a Web Service"
http://www.oracle.com/technology/obe/obe11jdev/11/wsdc/wsdc.htm
In this tutorial, under the section "Running the Page", you will see the image where an error message is displayed - "SoapException - Server was unable to process your request...."
I also get this error when I follow the tutorial's steps. If I repeatedly press the GetWeatherByZipCode commandButton, the message goes away and I get the data in the table as expected.
What I'd like to do is not show the end user this error, but instead eat the error and retry the request a few times. If after a few tries, I still get the error, then I can show the end user a nicer message.
How do I do this? Any documentation you can point me too would be appreciated. I'm new to the 'bindings' layer. I usually use JavaBeans/managed beans.
I'm using JDeveloper 11g (Main build from Oct 15th)
Thanks,
Jeanne

Answer 1

I've read about binding to #{adfFacesContext.initialRender} to not call the web service on initial render which is what you are probably talking about.
However, I get this error even after the first time I've displayed the page. I've heard that you cannot rely on web services always coming back to you with data ((e.g., like Twitter's data - that was the example I was given at a recent Google Tech Talk) . I need to handle the case where I get an error from the web service and I retry calling the web service behind the scenes so the end user is unaware. This is what I want to do. I can retry a few times, then give up, then pop up a nice error.
Thanks,
Jeanne