call

# File railties/lib/rails/rack/logger.rb, line 20
      def call(env)
        request = ActionDispatch::Request.new(env)

        env["rails.rack_logger_tag_count"] = if logger.respond_to?(:push_tags)
          logger.push_tags(*compute_tags(request)).size
        else
          0
        end

        call_app(request, env)
      end