How to add an Application custom error to the FacesPageLifecycle

Question

I am trying to implement an error handling framework for an application. I have created the required Execption classes(Extending the JboException class) and added a MyExceptionHandler that extends DCErrorHandlerImpl. I am overriding the reportExecption method and removing the error codes etc.
When an error case is encountered MyExceptionHandler.reportException is called from the page bean. This does not display the error in the Faces error dialog. I have noticed that MyExceptionHandler.getDisplayMessage is not invoked for my the custom application errors.
Other JboExecption generated by the database constraints or validation errors are shown in the error dialog and there is a call to the getDisplayMessage after the call to reportException in the MyExceptionHandler.
Should I explicitly call FacesPageLifecycle.addError...or something similar? If so what is the right place to do this.
Please point me to any available documentation if available.
Thanks,
Sireesha

Answer 1

That custom error handler is generally to handle errors thrown by your Model project. The place I first noticed this is when I tried to catch and specially handle the infamous token validation exception (even though that's a JBO exception, it's thrown by the databindings, not by the Model project...which is kind of unfortunate, I think; they should have used something in the oracle.adf.model package, which is where the other databinding implementations are stored). To really catch all exceptions, you have to handle them directly in the FacesPageLifecycle, not the ErrorHandler.
Edited by: Avrom Roy-Faderman on Oct 2, 2008 1:32 PM
Wait...were you also calling handler.reportException() directly? You're definitely not supposed to do that. Just throw your exceptions, and the appropriate functions will be called automatically as part of the lifecycle. This is independent of the other problem--that ErrorHandler never gets used for exceptions thrown from outside the business services layer.