[bv-dev] Promote fail fast?

[Michael Nascimento]

Yes, I've faced scenarios where fail-fast would have been very useful.
BVAL-214 should take this into account too if we move forward with
this proposal.

Regards,
Michael

On Mon, Aug 29, 2016 at 2:38 AM, Marco Molteni <moltenma at gmail.com> wrote:
> Hi guys,
>
> What do you think about the 'promotion' of fail-fast (from hibernate
> validator) to the BV API?
>
> I see frequently this 2 use cases (in the 9-5 projects) to support the
> request ;)
>
> 1. batch: there are a lot of batch processes that have to validate the input
> data (flat file -> bean -> validation) and return for each bean only a
> technical error if at least one field is not valid ('input refused'). When
> there are millions (e.g. payments transactions) of beans to validate in a
> batch and 30-50 fields for each bean the fail-fast saves a lot of time (and
> the night is never long enough for all the batches required) ;)
>
> 2. REST response: in the validation of REST services often when 2 systems
> exchange data the answer in case of error is an HTTP 4xx without many
> details. The fail-fast is a time and machine resources saving when your
> application is accessed by (hundred of) thousand users through some external
> web client (e.g. JS client).
>
> In the do-it-yourself implementations for the 2 uses cases at the first
> error an IllegalArgumentException is thrown with the information of the
> first error found.
>
> The full test of every field is very well suited for uses cases in which
> there is a human to machine communication (e.g. web forms).
>
> If your opinion is positive I can do more investigations if needed.
>
> Cheers
>
> Marco
>
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