[Dancer-users] do something after sending response

[damien krotkine]

On 12 August 2011 12:29, damien krotkine <dkrotkine at gmail.com> wrote:
>
>
> On 11 August 2011 20:40, sawyer x <xsawyerx at gmail.com> wrote:
>>
>> On Thu, Aug 11, 2011 at 9:37 PM, Colin Keith <colinmkeith at gmail.com> wrote:
>>>
>>> On Thu, Aug 11, 2011 at 2:27 PM, David Precious <davidp at preshweb.co.uk> wrote:
>>> > On Thursday 11 August 2011 18:17:47 David Precious wrote:
>>> >> Another possible alternative would be to fork a new process that will do
>>> >> the  stuff in the background, whilst the original process continues
>>>
>>> But as I thought about it a little more I realised that Dancer is
>>> usually used in an application situation (is it application, daemon,
>>> or some other term?) and so Dancer itself would keep running, unlike a
>>> CGI script, and so be able to manage the child processes. You could
>>> queue extra data if there are too many child processes or if the load
>>> is too high, etc. You shouldn't even need to serialize it as the OP
>>> mentioned unless it is large and you don't want it in memory or for
>>> data safety in case of a restart of the application.
>>
>> Actually, since Dancer is run on top of PSGI (not necessarily, but mainly), it means that you could use the AnyEvent PSGI server and push stuff to be run in async, on your own.
>
> That's a brillant idea, and probably the best compromise here. Forking has a high payload, but keeping a unique background child or using msg queues means serialization, which is not very convenient.

There is also the  POEx::Role::PSGIServer module, to do the same in POE.