Class: EasyBunnyRPC::TimedQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/easy_bunny_rpc/timed_queue.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TimedQueue

Returns a new instance of TimedQueue.



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# File 'lib/easy_bunny_rpc/timed_queue.rb', line 6

def initialize
  @array = Array.new
  @mutex = Mutex.new
  @cv = ConditionVariable.new
end

Instance Method Details

#pop_with_timeout(timeout = 0.5) ⇒ Object 



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# File 'lib/easy_bunny_rpc/timed_queue.rb', line 19

def pop_with_timeout(timeout=0.5)
  timeout_at = Time.now + timeout

  @mutex.synchronize do
    loop do
      if @array.empty?
        remaining = timeout_at - Time.now

        raise(Timeout::Error, "Waited #{timeout} seconds to pop") if(remaining <= 0)

        # unlocks mutex, waits for remaining seconds, locks mutex on wake-up
        @cv.wait(@mutex, remaining)
      else
        return @array.pop
      end
    end
  end
end

#push(item) ⇒ Object 



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# File 'lib/easy_bunny_rpc/timed_queue.rb', line 12

def push(item)
  @mutex.synchronize do
    @array.push(item)
    @cv.signal
  end
end