fork on client connection?

fork on client connection?

[Joseph McDonald]

Would it be possible to configure unicorn to fork off your rack
process when it gets a connection from a client as opposed to
preforking  the workers?  While in development mode I have my app kill
itself after serving a request, however at that point unicorn fires up
a new one right away.  If it could wait until it got a connection from
a client, that would be *super awesome* for development mode.

thanks,
-joe
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Re: fork on client connection?

[Suraj Kurapati]

On Thu, Feb 25, 2010 at 11:37 AM, Joseph McDonald <superjoe@gmail.com> wrote:
> Would it be possible to configure unicorn to fork off your rack
> process when it gets a connection from a client as opposed to
> preforking  the workers?

+1
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Re: fork on client connection?

[Eric Wong]

Joseph McDonald <superjoe@gmail.com> wrote:
> Would it be possible to configure unicorn to fork off your rack
> process when it gets a connection from a client as opposed to
> preforking  the workers?  While in development mode I have my app kill
> itself after serving a request, however at that point unicorn fires up
> a new one right away.  If it could wait until it got a connection from
> a client, that would be *super awesome* for development mode.

Hi Joseph,

Instead of forking late, you could avoid building your app until
a client has been accepted.  Try this in your Unicorn config file:

  preload_app false # default
  after_fork do |server, worker|
    server.app = server.orig_app
    server.preload_app = true
    def server.process_client(client)
      build_app!
      Process.kill(:QUIT, $$) # exit after serving
      super
    end
  end

-- 
Eric Wong
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