Class: Rack::PerftoolsProfiler

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/contrib/perftools_profiler.rb

Overview

Pass the :printer option to pick a different result format.

Constant Summary collapse

MODES = 
%w(
  process_time
  #wall_time
)
PROFILING_DATA_FILE = 
'/tmp/rack_perftools_profiler.data'
DEFAULT_PRINTER = 
:text
PRINTER_CONTENT_TYPE = 
{
  :text => 'text/plain',
  :gif => 'image/gif',
  :pdf => 'application/pdf'
}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ PerftoolsProfiler

Returns a new instance of PerftoolsProfiler.



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# File 'lib/rack/contrib/perftools_profiler.rb', line 170

def initialize(app, options = {})
  @app = app
  @printer = parse_printer(options[:printer])
  @times = (options[:times] || 1).to_i
end

Class Method Details

.clear_data ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 160

def self.clear_data
  ::File.delete(PROFILING_DATA_FILE) if ::File.exists?(PROFILING_DATA_FILE)
end

.with_profiling_off(app, options = {}) ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 164

def self.with_profiling_off(app, options = {})
  instance = self.new(app, options)
  instance.send(:profiling=, false)
  instance
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 180

def call(env)
  @original_request = Request.new(env)
  if enable_profiling_request?
    action = Action.for_request(@original_request, self)
    action.act
    action.response
  elsif disable_profiling_request?
    action = Action.for_request(@original_request, self)
    action.act
    action.response
  elsif profiling_data_request?
    if in_profiling_mode?
      [400, {'Content-Type' => 'text/plain'}, 'No profiling data available.']
    else
      return_profiling_data(env, @printer)
    end
  else
    if mode = profiling?(env.clone)
      action = Action.for_request(@original_request, self)
      action.act
      action.response
    else
      @app.call(env)
    end
  end
end

#printer ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 176

def printer
  @printer
end

#profile_call(env, times) ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 215

def profile_call(env, times)
  PerfTools::CpuProfiler.start(PROFILING_DATA_FILE) do 
    times.times { result = @app.call(env) }
  end
end

#return_profiling_data(env, printer) ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 221

def return_profiling_data(env, printer)
  if ::File.exists?(PROFILING_DATA_FILE)
    [200, headers(printer, env), print(printer)]
  else
    [404, {'Content-Type' => 'text/plain'}, 'No profiling data available.']
  end
end

#start ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 207

def start
  start_profiling
end

#stop ⇒ Object 



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# File 'lib/rack/contrib/perftools_profiler.rb', line 211

def stop
  stop_profiling
end