From: Jonas Hartmann <Mail@...>
Date: 2005-06-25T19:49:29+09:00
Subject: Re: FastCGI: handling the caching of ruby scripts.

Brian Candler wrote:
> On Fri, Jun 24, 2005 at 10:25:06PM +0900, Jonas Hartmann wrote:
> 
>>I cannot make the last example on this Page:
>>http://rubygarden.org/ruby/ruby?FCGIRubyWhyArentMyChangesDisplayed 
>>working yet...
> 
> 
> Which one - the "FastCgiConfig -autoUpdate" or the Thread.new ?
> 
> Both will only work if the main application file itself has updated, not any
> libraries which it 'requires'
> 
> You could write something which checks all the files in $". However, those
> paths are not absolute, and each one would have to be searched against $: to
> find them.
> 
> Hmm, I don't see a Ruby function to search for a file in a path (strange,
> maybe I'm missing something), so this gets a bit more long-winded than I
> expected:
> 
> ---- 8< -----------------------------------------------------------------
> #!/usr/bin/env ruby
> 
> require 'fcgi'
> # ... more requires
> 
> def path_search(file, pathlist)
>   return file if file[0..0] == File::SEPARATOR and File.exist?(file)
>   pathlist.each do |p|
>     fn = p+File::SEPARATOR+file 
>     return fn if File.exist?(fn)
>   end
>   nil
> end
> 
> Thread.new([File.expand_path(__FILE__)]) do |fname|
>   old_stats = {}
>   while true
>     (fname+$").each do |f|
>       stat = File.stat(path_search(f,$:)) rescue nil
>       if stat and old_stats[f]
>         exit if stat.mtime != old_stats[f].mtime or
>                 stat.ino != old_stats[f].ino
>       end
>       old_stats[f] = stat
>     end
>     sleep 10
>   end
> end
> 
> #... rest if program
> ---- 8< -----------------------------------------------------------------
> 
> To debug this, set "Thread.abort_on_exception=true" at the top.
> 
> I think this should work even if the number of files 'required' by the
> program increases over time.
> 
> Regards,
> 
> Brian.
> 
> 


You are sure the -autoUpdate flag does not check files and dependencies?

foo requires bar
foo changes => autoUpdate is invoked
bar changes => foo requires a different file?

what about load and evil(eval)?