Class: Callisto::Pool

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/callisto/pool.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Pool

Returns a new instance of Pool.



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# File 'lib/callisto/pool.rb', line 29

def initialize
  self.pending, self.running, self.workers = [], [], []
  self.queue = Queue.new
  1.upto(self.class.settings.max_workers) do
    worker = Thread.new do
      loop do
        task = self.queue.pop
        self.pending.delete self.class.settings.identifier.call(task)
        self.running << self.class.settings.identifier.call(task)
        self.class.settings.callback.call(task)
        self.running.delete self.class.settings.identifier.call(task)
      end
    end
    self.workers << worker
  end
end

Instance Attribute Details

#pending ⇒ Object

Returns the value of attribute pending.



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# File 'lib/callisto/pool.rb', line 10

def pending
  @pending
end

#queue ⇒ Object

Returns the value of attribute queue.



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# File 'lib/callisto/pool.rb', line 10

def queue
  @queue
end

#running ⇒ Object

Returns the value of attribute running.



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# File 'lib/callisto/pool.rb', line 10

def running
  @running
end

#workers ⇒ Object

Returns the value of attribute workers.



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# File 'lib/callisto/pool.rb', line 10

def workers
  @workers
end

Class Method Details

.settings ⇒ Object 



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# File 'lib/callisto/pool.rb', line 23

def settings
  @settings
end

.settings=(options) ⇒ Object 



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# File 'lib/callisto/pool.rb', line 14

def settings=(options)
  defaults = {
    :max_workers => 10,
    :identifier  => proc { |entry| entry.object_id },
    :callback    => proc { |entry| entry.call }
  }
  @settings = OpenStruct.new(defaults.merge(options))
end

Instance Method Details

#<<(task) ⇒ Object 



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# File 'lib/callisto/pool.rb', line 50

def <<(task)
  identifier = self.class.settings.identifier.call(task)
  if !processes.include?(identifier)
    self.pending << identifier
    self.queue << task
  end
  identifier
end

#processes ⇒ Object 



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# File 'lib/callisto/pool.rb', line 59

def processes
  pending + running
end

#wait(id = nil) ⇒ Object 



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# File 'lib/callisto/pool.rb', line 46

def wait(id = nil)
  sleep(0.1) while (id ? processes.include?(id) : processes.any?)
end