Maintain sort and paging with DataSource setInterval

// Declare the DS config during construction.  Also leverage the inline override
// support to replace the DS native setInterval implementation with a custom function
// that takes a function ref to generate the url sent
var ds = new YAHOO.util.DataSource(url, {
    responseType : YAHOO.util.DataSource.TYPE_JSON,
    responseSchema : {
        resultsList : 'Results',
        fields : [ 'foo','bar','baz' ],
    },
    setInterval : unction(ms, reqBuilder, callback) {
        var self = this,
            intv = setInterval(function () {
                self.makeConnection(reqBuilder(this.liveData), callback);
            }, ms);

        this._aIntervals.push(nId);

        return nId;
    }

});

// Create the DataTable
var dt = new YAHOO.widget.DataTable(tbl, cols, ds, {
    paginator : new YAHOO.widget.Paginator({ rowsPerPage : 20 }),
    dynamicData : true,
    sortedBy : {key:"foo", dir:YAHOO.widget.DataTable.CLASS_ASC},
    initialRequest : "sort=id&dir=asc&startIndex=0&results=25"
});

// To support server side pagination
dt.handleDataReturnPayload = function (req,res,payload) {
    payload.totalRecords = res.meta.totalRecords;
    return payload;
};

// custom augmentation, keeping an object reference with up to date state values for
// reference in the DataSource's interval
dt.liveState = dt.getState();
dt.dataSourceCallback = {
    success  : dt.onDataReturnSetRows,
    scope    : dt,
    argument : dt.liveState
};

// Before each request is sent, update the state object so the callback passed along
// with the DataSource io reflects the current table state
ds.subscribe('requestEvent', function () {
    YAHOO.lang.augmentObject(dt.liveState, dt.getState());
});

// initialize the interval, passing a function that will append the current state
// to the DataSource's seed url.  In this case, we'll just use DataTable's default
// generateRequest method.
ds.setInterval(5000, function (url) {
    return url + dt.get('generateRequest')(dt.liveState, dt);
}, dt.dataSourceCallback);