62 lines
1.3 KiB
Ruby
62 lines
1.3 KiB
Ruby
module EventMachine
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# Creates a one-time timer
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#
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# timer = EventMachine::Timer.new(5) do
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# # this will never fire because we cancel it
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# end
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# timer.cancel
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#
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class Timer
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# Create a new timer that fires after a given number of seconds
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def initialize interval, callback=nil, &block
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@signature = EventMachine::add_timer(interval, callback || block)
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end
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# Cancel the timer
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def cancel
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EventMachine.send :cancel_timer, @signature
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end
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end
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# Creates a periodic timer
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#
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# @example
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# n = 0
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# timer = EventMachine::PeriodicTimer.new(5) do
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# puts "the time is #{Time.now}"
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# timer.cancel if (n+=1) > 5
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# end
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#
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class PeriodicTimer
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# Create a new periodic timer that executes every interval seconds
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def initialize interval, callback=nil, &block
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@interval = interval
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@code = callback || block
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@cancelled = false
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@work = method(:fire)
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schedule
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end
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# Cancel the periodic timer
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def cancel
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@cancelled = true
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end
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# Fire the timer every interval seconds
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attr_accessor :interval
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# @private
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def schedule
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EventMachine::add_timer @interval, @work
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end
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# @private
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def fire
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unless @cancelled
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@code.call
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schedule
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end
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end
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end
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end
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