[Catalyst] Re: How to redirect before some code excute

[Andreas Marienborg]

I had to do something similar for a client recently, and although  
that clients codebase isnt catalyst, I still think my findings might  
be relative enough.

What I ended up doing was writing a (very) small POE server,  
listening on HTTP for commands. This server then simply returns  
whenever it gets a request, after queueing the job. They both use the  
same DB, so whenever the jobserver(poe thingy) is done, it updates a  
field in the DB with status.

On the frontendserver I then refresh the status either with ajax or  
with page refreshes (if you care how the job went).

I think this approach is quite flexible, as it allows me (if needed)  
to split the proces on two machines, and I dont have to worry about  
forking etc, since the poe server is single process. Admittedly my  
jobs are all run on a 3rd server (running windows), so I only have to  
do a small tcp-call to check the job-status from the poe-server, so  
if you have really long running jobs, this might not be enough after  
all, but POE has some cookbook examples of running long running jobs  
that might help you.

If you want to take a look at some of the POE stuff I did, just let  
me know.


andreas


On 26. okt. 2006, at 17.11, Jay K wrote:

> Hi,
>
> I think the idea is to start a long-running process based on a web-
> based trigger.... and allow the user to proceed on to do other
> things.  In other systems a fork() would probably be in order.
>
> I'm curious also - is there a Catalyst specific way of doing
> something like that...? and if not, is there any danger in fork()ing
> inside a catalyst app?
>
> Jay
>
> On Oct 26, 2006, at 9:43 AM, leonard.a.jaffe at jpmchase.com wrote:
>
>>
>> Fayland Lam <fayland at gmail.com> wrote:
>> >
>> > Lee Standen wrote:
>> > > It's a subroutine, right?
>> > >
>> > > Tried a return?....such as:
>> > >
>> > > $c->res->redirect('http://www.yahoo.com');
>> > > return undef;
>> >
>> > Indeed I want to run the 'while' loop in backend. 'return' would
>> not run
>> > the loop I think.
>>
>> Why do you want to run the loop in the background?
>> What purpose will it serve?
>>
>> If we can learn your motivation, we can try to find you
>> At Least One Way To Do It.
>>
>> Len.
>>
>>
>>
>>
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