Re: Issue 5801: Handle Validation Groups

Pre persist validation are handled by your persistence provider on the fly whenever you try to persist an entity. The downside is that your persistence provider will probably throw exceptions if validation fails which causes RequestFactory to call Receiver.onFailure() on the client because your server side service method throws an unexpected exception now.

I think there is no viable solution for pre-persist validation. You could probably modify RequestFactory on server side and let it catch any ConstraintViolationException during the service method invocation phase and then propagate them correctly to the client so that Receiver.onConstraintViolation() is called on the client. To do so you would need to copy RequestFactoryServlet and SimpleRequestProcessor from the GWT SDK into your project and patch them to your needs.

Not sure if there are other ways to solve this.

-- J.

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