Threaded Observer

[James Edward Gray II]

Help Thread gurus!

Why is the following code not printing the time every three second the
"Clock" is running, as I believe it should be?

#!/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..."
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

 

[James Edward Gray II]

Help Thread gurus!

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.

 

[Ara.T.Howard]

Help Thread gurus!

Why is the following code not printing the time every three second the
"Clock" is running, as I believe it should be?

#!/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..."
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

it does for me. on linux. are you on windows? if so the IO (puts) is
probably causing the whole process to sleep.

regards.

-a
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