Class: Actor::Statistics

Inherits:
Object
  • Object
show all
Defined in:
lib/actor/statistics.rb,
lib/actor/statistics/copy.rb,
lib/actor/statistics/timer.rb

Defined Under Namespace

Modules: Copy Classes: Timer

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Statistics

Returns a new instance of Statistics.



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# File 'lib/actor/statistics.rb', line 12

def initialize
  @executions = 0
  @elapsed_time = 0
  @sum_elapsed_time_squared = 0
end

Instance Attribute Details

#elapsed_time ⇒ Object

Returns the value of attribute elapsed_time.



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# File 'lib/actor/statistics.rb', line 3

def elapsed_time
  @elapsed_time
end

#executions ⇒ Object

Returns the value of attribute executions.



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# File 'lib/actor/statistics.rb', line 4

def executions
  @executions
end

#last_execution_time ⇒ Object

Returns the value of attribute last_execution_time.



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# File 'lib/actor/statistics.rb', line 5

def last_execution_time
  @last_execution_time
end

#maximum_elapsed_time ⇒ Object

Returns the value of attribute maximum_elapsed_time.



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# File 'lib/actor/statistics.rb', line 6

def maximum_elapsed_time
  @maximum_elapsed_time
end

#minimum_elapsed_time ⇒ Object

Returns the value of attribute minimum_elapsed_time.



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# File 'lib/actor/statistics.rb', line 7

def minimum_elapsed_time
  @minimum_elapsed_time
end

#start_time ⇒ Object

Returns the value of attribute start_time.



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# File 'lib/actor/statistics.rb', line 8

def start_time
  @start_time
end

#sum_elapsed_time_squared ⇒ Object

Returns the value of attribute sum_elapsed_time_squared.



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# File 'lib/actor/statistics.rb', line 9

def sum_elapsed_time_squared
  @sum_elapsed_time_squared
end

#timer ⇒ Object 



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# File 'lib/actor/statistics.rb', line 71

def timer
  @timer ||= Timer.new
end

Class Method Details

.build(actor) ⇒ Object 



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# File 'lib/actor/statistics.rb', line 18

def self.build actor
  instance = new
  actor.add_observer instance
  instance
end

Instance Method Details

#action_executed ⇒ Object 



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# File 'lib/actor/statistics.rb', line 30

def action_executed
  start_time, stop_time = timer.stop

  elapsed_time = stop_time - start_time

  self.elapsed_time += elapsed_time
  self.executions += 1
  self.last_execution_time = stop_time
  self.maximum_elapsed_time = [elapsed_time, maximum_elapsed_time].compact.max
  self.minimum_elapsed_time = [elapsed_time, minimum_elapsed_time].compact.min
  self.sum_elapsed_time_squared += elapsed_time ** 2
end

#average_elapsed_time ⇒ Object 



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# File 'lib/actor/statistics.rb', line 43

def average_elapsed_time
  return nil if executions.zero?

  Rational elapsed_time, executions
end

#executing_action ⇒ Object 



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# File 'lib/actor/statistics.rb', line 24

def executing_action
  now = timer.reset

  self.start_time ||= now
end

#standard_deviation ⇒ Object 



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# File 'lib/actor/statistics.rb', line 49

def standard_deviation
  return nil if executions.zero?

  average_elapsed_time = self.average_elapsed_time

  deviation = Math.sqrt(
    [
      0,
      Rational(sum_elapsed_time_squared, executions) - average_elapsed_time ** 2
    ].max
  )

  min = average_elapsed_time - deviation
  max = average_elapsed_time + deviation

  unless average_elapsed_time.zero?
    percent = Rational(deviation * 100, average_elapsed_time)
  end

  return deviation, min, max, percent
end