From: Yohanes Santoso <ysantoso-rubytalk@...>
Date: 2004-08-31T22:24:20+09:00
Subject: Re: Two issues with webrick - both threading & OS related

rdlugosz.1044583@bloglines.com writes:

> The media program aside, working with Jim Weirich today we discovered some
> other interesting things.  A absolutely basic webrick servlet that has a Thread.sleep
> in it's do_get will block all access to the servlet on any OS - the blocked
> request will execute immediately upon the blocker completing.  Here's the

Funny, I do not observe that behaviour:

--------------------------------------------------
class SleepServer < HTTPServlet::AbstractServlet
  def do_GET(req,resp)
    resp.body="Start: #{Time.new}\n"
    sleep(10)
    resp.body << "End: #{Time.new}\n"
    resp['content-type'] = 'text/plain'
  end
end

class GreetServer < HTTPServlet::AbstractServlet
  def do_GET(req, resp)
    resp.body="Hi, now is: #{Time.new}\n"
    resp['content-type']='text/plain'
  end
end

start_webrick {|server| 
  server.mount('/sleep', SleepServer)
  server.mount('/greet', GreetServer)
}
--------------------------------------------------

I then open 3 terminals and run:

Terminal 1:

dede:~$ w3m -dump http://localhost:8080/sleep
Start: Tue Aug 31 06:16:35 PDT 2004
End: Tue Aug 31 06:16:45 PDT 2004

Terminal 2:

dede:~$ w3m -dump http://localhost:8080/sleep
Start: Tue Aug 31 06:16:37 PDT 2004
End: Tue Aug 31 06:16:47 PDT 2004


Terminal 3:

ede:~$ w3m -dump http://localhost:8080/greet
Hi, now is: Tue Aug 31 06:16:39 PDT 2004
dede:~$ w3m -dump http://localhost:8080/greet
Hi, now is: Tue Aug 31 06:16:41 PDT 2004
dede:~$ w3m -dump http://localhost:8080/greet
Hi, now is: Tue Aug 31 06:16:43 PDT 2004
dede:~$ w3m -dump http://localhost:8080/greet
Hi, now is: Tue Aug 31 06:16:50 PDT 2004
dede:~$ ruby -v
ruby 1.8.1 (2004-02-03) [i386-linux]

Notice that while the /sleep in terminal 1 is waiting, another /sleep
call on terminal 2 is issued. And while terminals 1 and 2 are waiting
for the output, multiple /greet calls on terminal 3 can be executed
just fine.

So, I do not observe the blocking phenomenon you observed. 

I can't verify your next problem since I don't have access to XP.

YS.