From: "Berger, Daniel" <Daniel.Berger@...>
Date: 2005-06-30T00:09:31+09:00
Subject: Re: Detecting Windows Shutdown

> -----Original Message-----
> From: Dennis Misener [mailto:dm@dymaxion.com] 
> Sent: Wednesday, June 29, 2005 8:51 AM
> To: ruby-talk ML
> Subject: Detecting Windows Shutdown
> 
> 
> I needed to perform an orderly shutdown of a Webrick based Ruby 
> application.
> 
> I thought about trying to catch the WM_QUERYENDSESSION 
> message which is 
> sent to all programs when a request to shutdown Windows is made, in 
> order to execute some code before Windows exits.
> 
> Does anyone know how to do that in Ruby?
> 
> Is it even possible?

Since Windows tries to shutdown all applications before shutting itself
down (I think), you ought to be able to just add an at_exit handler to
your application to do what you want.

See Kernel#at_exit.

However, it is my opinion that any Webrick based Ruby application (i.e.
server) should probably be run as a Service.  If you decide to do this,
and you use the win32-service package, just define the exit behavior in
Daemon#service_stop and/or Daemon#service_shutdown methods.

Regards,

Dan