# File lib/nanite/admin.rb, line 14
    def call(env)
      req = Rack::Request.new(env)
      if cmd = req.params['command']
        @command = cmd
        @selection = req.params['type'] if req.params['type']
        
        options = {}
        case @selection
        when 'least_loaded', 'random', 'all', 'rr'
          options[:selector] = @selection
        else
          options[:target] = @selection
        end

        @mapper.request(cmd, req.params['payload'], options) do |response, responsejob|
          env['async.callback'].call [200, {'Content-Type' => 'text/html'}, [layout(ul(response, responsejob))]]
        end
        AsyncResponse
      else
        [200, {'Content-Type' => 'text/html'}, layout]
      end
    end