or... e-mail them the url when the process is done.
Bruno Lowagie wrote:
> I have a servlet that starts a long series of calculations.
> The calculations can take up to 30 minutes.
>
> This leads to 2 problems:
> 1. The timeout of the server is less than 30 minutes,
> so we get a 'document contains no data'.
> 2. We don't want to raise the timeout, because a user
> won't usually wait that long.
>
> We thought of the following solution:
> 1. The user calls a servlet.
> 2. This servlets starts a process in background that calculates
> a result and writes it to a file on the server.
> 3. The user gets an immediate response with the URL of this file,
> so he can visit this URL once the calculations are finished.
>
> What is the best way to do this? A servlet calling another servlet?
> Starting a thread (but won't this thread be killed once the servlet
> has sent his response)?
>
> Is there a means to let the user know when the calculations are done
> to prevent 404 errors or having to look at an incomplete result?
>
> Thanks in advance,
> Bruno
>
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