Ruby Timeout

standard timeout

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require 'timeout'
begin
  complete_results = Timeout.timeout(1) do
   sleep(2)
  end
rescue Timeout::Error
  puts 'Print me something please'
end

sometime, the code inner with begin will catch exception such as:

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require 'timeout'

puts "#{Time.now}: Starting"
begin
  Timeout.timeout(5) do
    begin
      sleep 10
    rescue Exception => e
      puts "#{Time.now}: Caught an exception: #{e.inspect}"
    end
    sleep 10
  end
rescue Timeout::Error => e
  puts "#{Time.now}: Timeout: #{e}"
else
  puts "#{Time.now}: Never timed out."
end

so new a thread, as ruby 1.9 thread is native

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begin
  complete_results = Timeout.timeout(4) do
    Thread.new{ results = platform.search(artist, album_name) }.value
  end
rescue Timeout::Error
  puts 'Print me something please'
end

implementation

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# From lib/timeout.rb

def timeout(sec, exception=Error)
  return yield if sec == nil or sec.zero?
  raise ThreadError, "timeout within critical session" if Thread.critical
  begin
    x = Thread.current
    y = Thread.start {
      sleep sec
      x.raise exception, "execution expired" if x.alive?
    }
    yield sec
    #    return true
  ensure
    y.kill if y and y.alive?
  end
end

system timer only for 1.8.

exception, rescue, ruby, timeout
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