Class: Narou::Worker

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/web/worker.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/web/worker.rb', line 14

def initialize
  @queue = Queue.new
  @size = 0
  @mutex = Mutex.new
  @worker_thread = nil
  @push_server = Narou::PushServer.instance
  @cancel_signal = false
  @thread_of_block_executing = nil
end

Instance Attribute Details

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/web/worker.rb', line 12

def size
  @size
end

Class Method Details

.cancel ⇒ Object 



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# File 'lib/web/worker.rb', line 64

def self.cancel
  instance.cancel
end

.canceled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/web/worker.rb', line 79

def self.canceled?
  instance.canceled?
end

.push(&block) ⇒ Object 



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# File 'lib/web/worker.rb', line 99

def self.push(&block)
  instance.push(&block)
end

.push_as_system_worker(&block) ⇒ Object

システム用のワーカー追加。内部カウントは増やさない



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# File 'lib/web/worker.rb', line 95

def self.push_as_system_worker(&block)
  instance.push(false, &block)
end

Instance Method Details

#cancel ⇒ Object 



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# File 'lib/web/worker.rb', line 68

def cancel
  @mutex.synchronize do
    if @size > 0
      @cancel_signal = true
      @size = 0
      @thread_of_block_executing.raise(Interrupt) if @thread_of_block_executing
      Thread.pass
    end
  end
end

#canceled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/web/worker.rb', line 83

def canceled?
  @cancel_signal
end

#countdown ⇒ Object 



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# File 'lib/web/worker.rb', line 119

def countdown
  @mutex.synchronize do
    @size -= 1
    @size = 0 if @size < 0
  end
end

#countup ⇒ Object 



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# File 'lib/web/worker.rb', line 113

def countup
  @mutex.synchronize do
    @size += 1
  end
end

#notification_queue ⇒ Object 



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# File 'lib/web/worker.rb', line 109

def notification_queue
  @push_server.send_all("notification.queue" => @size)
end

#push(counting = true, &block) ⇒ Object 



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# File 'lib/web/worker.rb', line 103

def push(counting = true, &block)
  countup if counting
  notification_queue
  @queue.push(block: block, counting: counting)
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/web/worker.rb', line 24

def running?
  !@worker_thread.!
end

#start ⇒ Object 



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# File 'lib/web/worker.rb', line 28

def start
  return if running?
  @worker_thread = Thread.new do
    loop do
      begin
        q = @queue.pop
        if canceled?
          @queue.clear
          @cancel_signal = false
        else
          #q[:block].call
          @thread_of_block_executing = Thread.new do
            q[:block].call
          end
          @thread_of_block_executing.tap do |th|
            th.join
            th = nil
          end
        end
      rescue SystemExit
      rescue Exception => e
        # Workerスレッド内での例外は表示するだけしてスレッドは生かしたままにする
        STDOUT.puts $@.shift + ": #{e.message} (#{e.class})"
        $@.each do |b|
          STDOUT.puts "  from #{b}"
        end
      ensure
        if q[:counting]
          countdown
          notification_queue
        end
      end
    end
  end
end

#stop ⇒ Object 



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# File 'lib/web/worker.rb', line 87

def stop
  @worker_thread.kill if @worker_thread
  @worker_thread = nil
end