code: def call(env)
        if @app.nil? || env[PATH_INFO] == @route_path
          statuses = []
          t = Time.now
          statuses = Filter.run_filters(@filters)
          render(statuses, Time.now - t)
        else
          @app.call(env)
        end
      end
docs: Create a new handler. This method can take a block which will yield itself so it can
   be configured.
  
   The handler can be set up in one of two ways. If no arguments are supplied, it will
   return a regular Rack handler that can be used with a rackup +run+ method or in a
   Rails 3+ routes.rb file. Otherwise, an application stack can be supplied in the first
   argument and a routing path in the second (defaults to <tt>/is_it_working</tt>) so
   it can be used with the rackup +use+ method or in Rails.middleware.