Rails - Jan 2007 - Forking a process in Rails is messing up mongrel

I''m trying to run an external Ruby script from my Rails app.

To do this i''m using this function

 def fork_with_new_connection(config, my_class = ActiveRecord::Base)
   pid = fork do
     begin
       my_class.establish_connection(config)
       yield
     ensure
       my_class.remove_connection
     end
   end
   Process.detach(pid)
 end

Then, within my controller I do this:

    # fork a process
    config = ActiveRecord::Base.remove_connection
    fork_with_new_connection(config) {
      @environment = (RAILS_ENV == ''development'') ?
''dev'' : ''prod''
      system("ruby ./public/utils/delicious_import.rb -u #{@user} -p
#{@pass} -r #{@rating} -d #{current_user} -e #{@environment}")
    }
    ActiveRecord::Base.establish_connection(config)


I have two questions.  First, is this the proper/correct way to run an
external script from a rails controller.  I just want to fire off the
script and continue; I don''t want to wait around for its completion or
status.

Second, when I do this, my mongrel.pid file seems to be deleted as soon
as the child process completes.  It looks like the child process''s
parent is a mongrel_rails process (which makes sense since I am running
mongrel), but then when the process dies, it also removes the
mongrel.pid file from my log/ directory.

-- 
Posted via http://www.ruby-forum.com/.

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> I''m trying to run an external Ruby script from my Rails app.
>
> I have two questions.  First, is this the proper/correct way to run an
> external script from a rails controller.  I just want to fire off the
> script and continue; I don''t want to wait around for its
completion or
> status.
Don''t know about fork, but whenever external scripts come up, everyone 
recommends looking at backgrounddrb: http://backgroundrb.rubyforge.org/

-philip

>
> Second, when I do this, my mongrel.pid file seems to be deleted as soon
> as the child process completes.  It looks like the child process''s
> parent is a mongrel_rails process (which makes sense since I am running
> mongrel), but then when the process dies, it also removes the
> mongrel.pid file from my log/ directory.
>
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Craig, please read this:

http://rubyforge.org/pipermail/mongrel-users/2006-August/001207.html

Not sure if it''s relevant, but might help.

Vish

On 1/13/07, Philip Hallstrom
<rails-SUcgGwS4C16SUMMaM/qcSw@public.gmane.org>
wrote:
>
> > I''m trying to run an external Ruby script from my Rails app.
> >
> > I have two questions.  First, is this the proper/correct way to run an
> > external script from a rails controller.  I just want to fire off the
> > script and continue; I don''t want to wait around for its
completion or
> > status.
>
> Don''t know about fork, but whenever external scripts come up,
everyone
> recommends looking at backgrounddrb: http://backgroundrb.rubyforge.org/
>
> -philip
>
>
> >
> > Second, when I do this, my mongrel.pid file seems to be deleted as
soon
> > as the child process completes.  It looks like the child
process''s
> > parent is a mongrel_rails process (which makes sense since I am
running
> > mongrel), but then when the process dies, it also removes the
> > mongrel.pid file from my log/ directory.
> >
> > --
> > Posted via http://www.ruby-forum.com/.
> >
> > >
> >
>
> >
>
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