class Metrician::Middleware::ApplicationTiming

RequestTiming and ApplicationTiming work in concert to time the middleware separate from the request processing. RequestTiming should be the first or near first middleware loaded since it will be timing from the moment the the app server is hit and setting up the env for tracking the middleware execution time. RequestTiming should be the last or near last middleware loaded as it times the application execution (separate from middleware).

Public Class Methods

new(app) click to toggle source
# File lib/metrician/middleware/application_timing.rb, line 12
def initialize(app)
  @app = app
end

Public Instance Methods

call(env) click to toggle source
# File lib/metrician/middleware/application_timing.rb, line 16
def call(env)
  if Middleware.request_timing_required?
    start_time = Time.now.to_f
  end
  @app.call(env)
ensure
  if Middleware.request_timing_required?
    env[ENV_REQUEST_TOTAL_TIME] ||= (Time.now.to_f - start_time)
  end
end