[hibernate-dev] Fail fast feature for Hibernate Validator

[Gunnar Morling]

Hi,

I like the idea. Emmanuel's performance test showed an execution time per
validation of 11 vs. 74 ms on my system, so there seems to be some
potential. Instead of having a "failFast" flag one could also introduce a
numeric parameter to control, when validation should stop. A value of "1"
would be equal to the flag being true, but one could also decide to stop
just after 3 validation errors for instance.

Gunnar


2010/10/4 Emmanuel Bernard <emmanuel at hibernate.org>

> That or slowish validations.
>
> One typical use case is that:
>
> if ( validator.validate(customer, StraightToValidationScreen.class).size()
> >0 ) {
>  //manual process
> }
> else {
>  //automatic process
> }
>
> BTW, I've committed a non scientific perf test that shows an average of 5x
> perf improvement on an object graph of 5 object (one master and 4 children)
> and 4 constraints on A and 3 on B. Around 22ms vs 120 ms. (log4j logs set to
> ERROR). The perf change is visible even on smallish graphs.
>
> It can be worthwhile.
>
> On 4 oct. 2010, at 16:20, Hardy Ferentschik wrote:
>
> > What would be the usecase? Saving time in large object graphs where I am
> only interested in whether there is a
> > failure at all? You really need LARGE object graphs to make this worth
> while.
> >
> >
> > On Mon, 04 Oct 2010 15:45:34 +0200, Emmanuel Bernard <
> emmanuel at hibernate.org> wrote:
> >
> >> http://github.com/emmanuelbernard/hibernate-validator/commits/failFast
> >>
> >> What do you guys think?
> >>
> >> The idea is to stop a the first failure.
> >> You can enable that :
> >> - by property
> >> - at config time
> >> - when the Validator is created
> >>
> >> Look at
> >>
> http://github.com/emmanuelbernard/hibernate-validator/blob/failFast/hibernate-validator/src/test/java/org/hibernate/validator/test/engine/failFast/FailFastTest.java
> >> for code examples.
> >>
> >> Emmanuel
> >>
> >
>
>
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