Class: FocalPoint

Inherits:
Object
  • Object
show all
Includes:
Multiton
Defined in:
lib/focal_point.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Multiton

#clone, #dup

Constructor Details

#initialize(target) ⇒ FocalPoint

Returns a new instance of FocalPoint.



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# File 'lib/focal_point.rb', line 10

def initialize(target)
  @target = String(target)
  @timer = Hitimes::TimedMetric.new(@target)

  if @target =~ /^([^#.]+)(#|\.)(.*)$/
    @method_name = $3
    @scope = case $2
             when '#' ## we're instrumenting an instance method
               eval($1)
             when '.' ## we're instrumenting a module method
               (class << eval($1); self; end)
              end
  else
    $stdout.puts "FocalPoint::Error: Not sure how to instrument #{@target}"
  end

  # make timer and unbound available to the lambda 
  timer = @timer
  unbound = @scope.instance_method(@method_name)
  @scope.send(:undef_method , @method_name)
  @scope.send(:define_method, @method_name) do |*args, &block|
    lambda {
      bound = unbound.bind(self)
      timer.measure { bound.call(*args, &block) }
    }.call
  end
end

Instance Attribute Details

#timer ⇒ Object

Returns the value of attribute timer.



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# File 'lib/focal_point.rb', line 8

def timer
  @timer
end

Class Method Details

.report(io = $stdout) ⇒ Object 



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# File 'lib/focal_point.rb', line 46

def report(io=$stdout)
  timers = []
  ObjectSpace.each_object(FocalPoint) { |fp| timers << fp.timer }
  timers.compact.sort_by(&:sum).each do |timer|
    io.puts '-'*80
    timer.to_hash.each { |k,v| io.puts "#{k}: #{v}" }
    io.puts
  end
end

.watch(*targets) ⇒ Object

FocalPoint.watch(“ClassName#instance_method”) FocalPoint.watch(“ClassName.class_method”)



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# File 'lib/focal_point.rb', line 42

def watch(*targets)
  targets.each { |t| FocalPoint.new(t) }
end