When the user stores a form, I do all kind of validations on the server side. This can lead to VetoExceptions on the server so the action is aborted and the user gets a nice box with error messages.
Now we have a requirement that the system can give warnings and the user can override these. So if there are only warnings the error message box should have an option (button) that means Continue (ignore the warnings).
Is there some kind of support for this behaviour already in Scout or some "standard" way to achive this in Scout?
In your FormHandler during execValidate() you do what you want. In your case I would create a new FormData and import the current values (exactly like in execStore()) and call a "validate(YourFormData)" in the process service.
You can define a bean that will contain the answer from the server. In your execValidate(), depending on this answer you display a message box and depending on the answer you return true (if the validation is successful, in this case execStore will be called) or false if the user need to return to the form to change something.