Class: Rack::RubyProf::RackProfiler

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-prof/rack.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ RackProfiler

Returns a new instance of RackProfiler.



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# File 'lib/ruby-prof/rack.rb', line 53

def initialize(options)
  @options = options

  @profile = ::RubyProf::Profile.new(profiling_options)
  @profile.start
  @profile.pause

  @printer_klasses = options[:printers] || default_printers

  @tmpdir = options[:path]

  @max_requests = options[:max_requests] || 1
  @requests_count = 0

  @printed = false
  # if running across multiple requests, we want to make sure that the
  # ongoing profile is not lost if the process shuts down before the
  # max request count is reached
  ObjectSpace.define_finalizer(self, proc { print! })
end

Instance Method Details

#max_requests_reached? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby-prof/rack.rb', line 83

def max_requests_reached?
  @requests_count >= @max_requests
end

#pause ⇒ Object 



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# File 'lib/ruby-prof/rack.rb', line 78

def pause
  @profile.pause
  @requests_count += 1
end

#print!(prefix = nil) ⇒ Object 



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# File 'lib/ruby-prof/rack.rb', line 87

def print!(prefix = nil)
  return false if @printed || @requests_count == 0

  data = @profile.stop

  prefix ||= "multi-requests-#{@requests_count}"

  @printer_klasses.each do |printer_klass, base_name|
    printer = printer_klass.new(data)

    if base_name.respond_to?(:call)
      base_name = base_name.call
    end

    if printer_klass == ::RubyProf::MultiPrinter \
        || printer_klass == ::RubyProf::CallTreePrinter
      printer.print(@options.merge(:profile => "#{prefix}-#{base_name}"))
    else
      file_name = ::File.join(@tmpdir, "#{prefix}-#{base_name}")
      ::File.open(file_name, 'wb') do |file|
        printer.print(file, @options)
      end
    end
  end

  @printed = true
end

#resume ⇒ Object 



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# File 'lib/ruby-prof/rack.rb', line 74

def resume
  @profile.resume
end