Class: ThreadPuddle

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(size = 24) ⇒ ThreadPuddle

Returns a new instance of ThreadPuddle.



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# File 'lib/thread_puddle.rb', line 7

def initialize size = 24
  @size  = size
  @state = :running
  @queue = Queue.new
  @pool  = size.times.map do
    Thread.new do
      catch :exit do
        loop do
          job, args, result_queue = queue.deq

          if result_queue
            result_queue.enq job.call *args
          else # async
            job.call *args
          end
        end
      end
    end
  end
end

Instance Attribute Details

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/thread_puddle.rb', line 5

def size
  @size
end

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/thread_puddle.rb', line 5

def state
  @state
end

Instance Method Details

#perform(*args, &block) ⇒ Object 



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# File 'lib/thread_puddle.rb', line 36

def perform *args, &block
  if state == :running
    result_queue = Queue.new
    queue.enq [block, args, result_queue]

    result_queue.deq
  else
    raise "thread pool has been shutdown"
  end
end

#shutdown(timeout = nil) ⇒ Object 



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# File 'lib/thread_puddle.rb', line 47

def shutdown timeout = nil
  state = :shutting_down

  size.times do
    submit do
      throw :exit
    end
  end
 
  if timeout
    shutdown_with_timeout timeout
  else
    pool.each &:join
  end
 
  queue.clear
  state = :terminated
  size  = 0
end

#status ⇒ Object 



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# File 'lib/thread_puddle.rb', line 67

def status
  {
    :size    => size,
    :state   => state,
    :threads => pool.map(&:status), 
    :queue   => {
      :size  => queue.size,
      :consumers => queue.num_waiting,
    },
  }
end

#submit(*args, &block) ⇒ Object 



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# File 'lib/thread_puddle.rb', line 28

def submit *args, &block
  if state == :running
    queue.enq [block, args]
  else
    raise "thread pool has been shutdown"
  end
end