Raise Error Gracefully from Managed Bean

Question

Hi,
I know that when you enter information that violates a validator a "nice looking" error message displays with the JBO number and text explaining to the user there was an error.
I want to raise an error message like that if the user tries to delete a master without cleaning out the detail rows. Here is the code I've used to implement this, however, the message raised is an "ugly" stack dump because the exception is never caught. Is there a good way to do this?
    public String deleteAppUser() throws JboException
        BindingContainer bindings = getBindings();
        DCBindingContainer dcbindings = (DCBindingContainer)bindings;
        DCIteratorBinding userProcIter = dcbindings.findIteratorBinding("ProcessesIterator");
        if( userProcIter.getEstimatedRowCount() > 0 )
            throw new JboException( "Cannot delete an AppUser that still has Processes associated." );
        OperationBinding operationBinding =
            bindings.getOperationBinding( "Delete" );
        Object result = operationBinding.execute();
        if ( !operationBinding.getErrors().isEmpty() )
            return null;
        DCIteratorBinding searchUserIter = dcbindings.findIteratorBinding("SearchUserIterator");
        searchUserIter.getDataControl().commitTransaction();
        return "details";
    }I cannot use a simple composition association (like I can with the Users to the AppUser) because the AppUsers table doesn't have a direct foreign key to the UserProcesses table.
Thank you,
Brian

Answer 1

Hi,
please have a look at the SRDemo sample application (either ADF BC or TopLink). Both have a framework extension pacage in the ViewLayer project that contains a customized ADFPageLifecycle listener to show user friendly errors.
Have a look and you get all the code you need
Frank