How to reload in jquery datatable when callback draw?

matt.crawfoord

I have a jquery DataTable is server-side processing mode .
How to add setTimeout function when server side callback like this

my code as below,

$(document).ready(function() {   
  $.fn.dataTable.ext.errMode = 'none';
  var table = $('#example').DataTable( {
    "processing": true,
    "serverSide": true,
    "jQueryUI": true,
    "ordering": true,
     "order": [[1, 'desc']],//default
      "lengthMenu": [
        [50, 100, 1000],
        [50, 100, 1000]
      ],

     "ajax": function ( data, callback, settings ) {
        url: "process.php",
       type: "POST",
       data: {
       start: "<?php echo $start; ?>",
       end: "<?php echo $start; ?>"
          },

        setTimeout( function () {
            callback( {
                draw: data.draw,
                data: aaData,
                recordsTotal: data.recordsTotal,
                recordsFiltered: data.recordsFiltered
            } );
        }, 50 );
    },

    "columns": [
        {
            "className":'details-control',
            "orderable":false,
            "data":null,
            "defaultContent": ''
        },
        { "data": "time"},
    { "data": "message","orderable": false}

    ],
    "dom": 'frtiS',
    "scrollY": 600,
    "scroller": {

         "loadingIndicator": true
    },
    "deferRender":    true

} );

Obviously this doesn't work ,
Can someone point me out the correct way to do it.

Thanks,