jQuery DataTables server-side processing with Java

I am looking for how to implement jQuery DataTables with server-side processing in Java. I have tried the following way by using the below parameters. Below is my jQuery ready function code.

$(document).ready(function() {
    //url = http://localhost:8080/jQuery-DataTable-Java-Integration/serverExample
    $('#myTableId').DataTable({
        "serverSide" : true,
        "processing" : true,
        /*"bProcessing" : true,
        "bServerSide" : true,*/
        "ajax" : {
            "url" : "serverExample",
            "type" : "POST"
        },
        "columns" : [ {
            "data" : "Phone Number"
        }, {
            "data" : "name"
        }, {
            "data" : "Email"
        } ]
    });
});

In my servlet doPost() method I the request parameter sEcho is null.

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        logger.info("In do post method of server servlet..");
        logger.info("sEcho request parameter = " + request.getParameter("sEcho"));//returning null
//other code here
}

My jQuery DataTables version is 1.10.7. Which parameters should be used, serverSide or bServerside, I tried both ways, but still the same. Any latest updated working example references would be helpful.