# File lib/mcollective/rpc/client.rb, line 223
      def method_missing(method_name, *args, &block)
        # set args to an empty hash if nothings given
        args = args[0]
        args = {} if args.nil?

        action = method_name.to_s

        @stats.reset

        validate_request(action, args)

        # if a global batch size is set just use that else set it
        # in the case that it was passed as an argument
        batch_mode = args.include?(:batch_size) || @batch_mode
        batch_size = args.delete(:batch_size) || @batch_size
        batch_sleep_time = args.delete(:batch_sleep_time) || @batch_sleep_time

        # if we were given a batch_size argument thats 0 and batch_mode was
        # determined to be on via global options etc this will allow a batch_size
        # of 0 to disable or batch_mode for this call only
        batch_mode = (batch_mode && Integer(batch_size) > 0)

        # Handle single target requests by doing discovery and picking
        # a random node.  Then do a custom request specifying a filter
        # that will only match the one node.
        if @limit_targets
          target_nodes = pick_nodes_from_discovered(@limit_targets)
          Log.debug("Picked #{target_nodes.join(',')} as limited target(s)")

          custom_request(action, args, target_nodes, {"identity" => /^(#{target_nodes.join('|')})$/}, &block)
        elsif batch_mode
          call_agent_batched(action, args, options, batch_size, batch_sleep_time, &block)
        else
          call_agent(action, args, options, :auto, &block)
        end
      end