Class: Termplot::Consumer

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Consumer

Returns a new instance of Consumer.



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# File 'lib/termplot/consumer.rb', line 10

def initialize(options)
  @options = options
  @renderer = Renderer.new(
    cols: options.cols,
    rows: options.rows,
    debug: options.debug
  )
  @series = Series.new(
    title: options.title,
    max_data_points: renderer.inner_width,
    line_style: options.line_style,
    color: options.color,
  )
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/termplot/consumer.rb', line 8

def options
  @options
end

#renderer ⇒ Object (readonly)

Returns the value of attribute renderer.



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# File 'lib/termplot/consumer.rb', line 8

def renderer
  @renderer
end

#series ⇒ Object (readonly)

Returns the value of attribute series.



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# File 'lib/termplot/consumer.rb', line 8

def series
  @series
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/termplot/consumer.rb', line 25

def run
  Shell.init
  queue = Queue.new

  # Consumer thread will process and render any available input in the
  # queue. If samples are available faster than it can render, multiple
  # samples will be shifted from the queue so they can be rendered at once.
  # If no samples are available but the queue is open, it will sleep until
  # woken to render new input.
  consumer = Thread.new do
    while !queue.closed?
      num_samples = queue.size
      if num_samples == 0
        Thread.stop
      else
        num_samples.times do
          series.add_point(queue.shift)
        end

        renderer.render(series)
        series.max_data_points = renderer.inner_width
      end
    end
  end

  # Producer will run in the main thread and will block while producing
  # samples from some source (which depends on the type of producer).
  # Samples will be added to the queue as they are available, and the
  # consumer will be woken to check the queue
  producer = build_producer(queue)
  producer.register_consumer(consumer)
  producer.run

  # As soon as producer continues, and we first give the consumer a chance
  # to finish rendering the queue, then close the queue.
  consumer.run
  producer.close
  consumer.join
end