From: James Edward Gray II <james@...>
Date: 2004-11-06T08:23:32+09:00
Subject: Re: Threaded Observer

On Nov 5, 2004, at 5:18 PM, James Edward Gray II wrote:

> Help Thread gurus!  :D

Figures, I got it as soon as I pushed "Send".  The correction is below, 
for the curious.

Sorry about the noise.

James Edward Gray II

> #!/usr/bin/env ruby
>
> require "observer"
> require "singleton"
>
> class Clock
> 	include Observable
> 	include Singleton
> 	
> 	def start( seconds_delay )
> 		@thread = Thread.new(self, seconds_delay) do |notifier, delay|
> 			loop do
> 				puts "Notifying..."

				changed # I often forget this, for some reason.

> 				notifier.notify_observers
> 				sleep delay
> 			end
> 		end
> 	end
> 	
> 	def stop
> 		unless @thread.nil?
> 			@thread.kill
> 			@thread = nil
> 		end
> 	end
> end
>
> if $0 == __FILE__
> 	class TimePrinter
> 		def update
> 			puts Time.now
> 		end
> 	end
>
> 	clock = Clock.instance
> 	clock.add_observer TimePrinter.new
>
> 	puts "Starting clock..."
> 	clock.start 3
> 	sleep 10
> 	clock.stop
> 	puts "Clock stopped..."
> 	sleep 10
> end
>
> __END__
>
> Thanks.
>
> James Edward Gray II
>
>
>