Shutdown Hook?

[kitplummer]

Is there a shutdown hook for Sinatra? I'd only seen one mention of it
prior, in this group. It mentioned an 'at_exit do' block...but, that
didn't work.

I'm running Sinatra from a Gumstix, and need to turn off an LED is
Sinatra gets shutdown. I can light the LED in the configure do block
- no prob.

Any help?

Kit

[Harry Vangberg]

What happens when you create a classic top level block is that Sinatra adds an at_exit-hook which runs the app at exit:

== lib/sinatra/main.rb L44

at_exit do

  raise $! if $!

  Sinatra::Application.run! if Sinatra::Application.run?

end

==

To my knowledge Sinatra doesn't have a shutdown hook, but a solution could be to create a sub class app:

==

require 'sinatra/base'

class MyApp < Sinatra::Default

  configure do

    puts "STARTING!"

  end

  get '/foo' do

    "bar"

  end

end

MyApp.run!

at_exit do

  puts "SHUTTING DOWN!"

end

==

And the actual output:

$ ruby -rubygems my_app.rb

STARTING!

== Sinatra/0.9.1 has taken the stage on 4567 for development with backup from Thin

>> Thin web server (v1.0.0 codename That's What She Said)

>> Maximum connections set to 1024

>> Listening on 0.0.0.0:4567, CTRL+C to stop

^C>> Stopping ...

== Sinatra has ended his set (crowd applauds)

SHUTTING DOWN!

$

2009/3/8 kitplummer <kitpl...@gmail.com>

[candlerb]

> To my knowledge Sinatra doesn't have a shutdown hook, but a solution could
> be to create a sub class app:

I think this is right, but I suggest you use a rackup file rather than
MyApp.run!

This is because you have to do your own command-line parsing to pass
appropriate options to MyApp.run!(...) to be able to select the port,
server and environment (or else hard-code them).

Regards,

Brian.