Ah, I did not know that the browsers consider a double-click to be a
single action. That's smart! I have a similar piece of javascript,
but I am also looking for a server-side solution for users who have
javascript disabled.
On May 25, 2009, at 12:33 PM, Oscar Westra van Holthe - Kind wrote:
> On 25-05-2009 at 12:13, Michael Day wrote:
>> I would like to prevent optimistic locking exceptions when a user
>> double-clicks a link or double-submits a form. Is there anything
>> wrong with accomplishing this by synchronizing the HTTP session in my
>> ActionBean as shown below?
>>
>> public Resolution execute() {
>> synchronized (getContext().getRequest().getSession()) {
>> ...
>> }
>> }
>
> Double-clicking would not cause a problem, as it's still a single
> action.
> However, it is possible that a users is just a tad too slow to
> double-click:
> the browser then sees it as two single-clicks, and submits the form
> twice.
>
> Personally, I've solved this with a bit of javascript in the onsubmit
> attribute of the form, and a bit of page-wide javascript (it can be
> made
> form-specific):
>
> var alreadySybmitted = false;
> function maySubmit()
> {
> var result = !alreadySybmitted;
> alreadySybmitted = true;
> return result;
> }
>
>
> <stripes:form ... onsubmit="return maySubmit();">
> ...
> </stripes:form>
>
>>
>>
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>
> --
> ,-_ Oscar Westra van holthe - Kind http://www.xs4all.nl/~kindop/
> /() )
> (__ ( A: Because people normally read from top to bottom.
> =/ () Q: Why is top-posting such a bad thing?
>
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> is a gathering of tech-side developers & brand creativity
> professionals. Meet
> the minds behind Google Creative Lab, Visual Complexity, Processing, &
> iPhoneDevCamp asthey present alongside digital heavyweights like
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Group, R/GA, & Big Spaceship. http://www.creativitycat.com
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