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Date: Wed, 23 Sep 2015 09:31:03 +0000
From: Eric Wong <e@80x24.org>
To: "Lin Jen-Shin (godfat)" <godfat@godfat.org>
Cc: yahns-public@yhbt.net
Subject: Re: -1 shutdown_timeout?
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"Lin Jen-Shin (godfat)" <godfat@godfat.org> wrote:
> Just tried it, but not sure where to put this.
> With preload=true, yahns is trapping later than
> the application. Maybe I should just set it to false
> since we're not forking anyway...

Anywhere in your normal app dispatch path, just initialize the
lock during application load (regardless of preload value)

  def initialize(...)
    @lock = Mutex.new
    @old_quit = nil
  end

  def call(env)
    unless @old_quit
      @lock.synchronize do
        @old_quit ||= trap(:QUIT) do
          app_specific_quit
          @old_quit.call
        end
      end
    end
    ...
  end