Module: Reflekt

Defined in:
lib/Reflekt.rb

Defined Under Namespace

Modules: SingletonClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.prepended(base) ⇒ Object 



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# File 'lib/Reflekt.rb', line 126

def self.prepended(base)

  # Prepend class methods to the instance's singleton class.
  base.singleton_class.prepend(SingletonClassMethods)

  # Setup class.
  @@reflekt = Accessor.new()
  @@reflekt.setup ||= reflekt_setup_class

end

.reflekt_setup_class ⇒ Object

Setup class.



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# File 'lib/Reflekt.rb', line 138

def self.reflekt_setup_class()

  # Receive configuration.
  $ENV ||= {}
  $ENV[:reflekt] ||= $ENV[:reflekt] = {}

  # Set configuration.
  @@reflekt.path = File.dirname(File.realpath(__FILE__))

  # Build reflections directory.
  if $ENV[:reflekt][:output_path]
    @@reflekt.output_path = File.join($ENV[:reflekt][:output_path], 'reflections')
  # Build reflections directory in current execution path.
  else
    @@reflekt.output_path = File.join(Dir.pwd, 'reflections')
  end
  # Create reflections directory.
  unless Dir.exist? @@reflekt.output_path
    Dir.mkdir(@@reflekt.output_path)
  end

  # Create database.
  @@reflekt.db = Rowdb.new(@@reflekt.output_path + '/db.json')
  @@reflekt.db.defaults({ :reflekt => { :api_version => 1 }})

  # Create shadow execution stack.
  @@reflekt.stack = ShadowStack.new()

  # Define rules.
  # TODO: Fix Rowdb.get(path) not returning data at path after Rowdb.push()?
  @@reflekt.rules = {}
  db = @@reflekt.db.value()
  db.each do |class_name, class_values|
    @@reflekt.rules[class_name] = {}
    class_values.each do |method_name, method_values|
      next if method_values.nil?
      next unless method_values.class == Hash
      if method_values.key? "controls"

        ruler = Ruler.new()
        ruler.load(method_values['controls'])
        ruler.train()

        @@reflekt.rules[class_name][method_name] = ruler
      end
    end
  end

  # The amount of reflections to create per method call.
  @@reflekt.reflect_amount = 2

  # Limit the amount of reflections that can be created per instance method.
  # A method called thousands of times doesn't need that many reflections.
  @@reflekt.reflection_limit = 10

  # Create renderer.
  @@reflekt.renderer = Renderer.new(@@reflekt.path, @@reflekt.output_path)

  return true
end

Instance Method Details

#initialize(*args) ⇒ Object 



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# File 'lib/Reflekt.rb', line 27

def initialize(*args)

  @reflection_counts = {}

  # Get instance methods.
  # TODO: Include parent methods like "Array.include?".
  self.class.instance_methods(false).each do |method|

    # Don't process skipped methods.
    next if self.class.reflekt_skipped?(method)

    @reflection_counts[method] = 0

    # When method called in flow.
    self.define_singleton_method(method) do |*args|

      # Don't reflect when limit reached.
      unless @reflection_counts[method] >= @@reflekt.reflection_limit

        # Get current execution.
        execution = @@reflekt.stack.peek()

        # When stack empty or past execution done reflecting.
        if execution.nil? || execution.has_finished_reflecting?

          # Create execution.
          execution = Execution.new(self, @@reflekt.reflect_amount)
          @@reflekt.stack.push(execution)

        end

        # Get ruler.
        # The method's ruler will not exist the first time the db generated.
        if @@reflekt.rules.key? execution.caller_class.to_s.to_sym
          ruler = @@reflekt.rules[execution.caller_class.to_s.to_sym][method.to_s]
        else
          ruler = nil
        end

        # Reflect.
        # The first method call in the Execution creates a Reflection.
        # Subsequent method calls are shadow executions on cloned objects.
        if execution.has_empty_reflections? && !execution.is_reflecting?
          execution.is_reflecting = true

          class_name = execution.caller_class.to_s
          method_name = method.to_s

          # Create control.
          control = Control.new(execution, method, ruler)
          execution.control = control

          # Execute control.
          control.reflect(*args)

          # Save control.
          @@reflekt.db.get("#{class_name}.#{method_name}.controls").push(control.result())

          # Multiple reflections per execution.
          execution.reflections.each_with_index do |value, index|

            # Create reflection.
            reflection = Reflection.new(execution, method, ruler)
            execution.reflections[index] = reflection

            # Execute reflection.
            reflection.reflect(*args)
            @reflection_counts[method] = @reflection_counts[method] + 1

            # Save reflection.
            @@reflekt.db.get("#{class_name}.#{method_name}.reflections").push(reflection.result())

          end

          # Save results.
          @@reflekt.db.write()

          # Render results.
          @@reflekt.renderer.render()

          execution.is_reflecting = false
        end

      end

      # Continue execution / shadow execution.
      super *args

    end

  end

  # Continue initialization.
  super

end