Realtime dynamic charting

MyRowRenderer extends RowRenderer {
@Override
	public void render(Row row, Object data) throws Exception {
                  List<MyModel> modelList = (List<MyModel>)data;
                for(MyModel myModel : modelList) {
                    Panel panel = new Panel();
       	            panel.setTitle(myModel.getTitle());
		    Panelchildren panelChild = new Panelchildren();
	            panelChild.setParent(panel);
                 
                     Listbox lb = new Listbox();
	             Listitem item1 = new Listitem();
          
                     Listcell cell1 = new Listcell("Total Memory");
  		     Listcell cell2 = new Listcell(myModel.getTotalMemory());
                     cell1.setParent(item1);
	             cell2.setParent(item1);
                     Chart chart = new Chart();
		     chart.setType("line");

		     chart.setHeight("100px");
		     chart.setWidth("190px");
                     XYModel model = new SimpleXYModel();
                     model.addValue("tm", myModel.getTimeStamp(), myModel.getCurrentValue());
                     chart.setModel(model);

                      chart.setParent(panelChild);
		      panel.setParent(row);

}

        }

}

class MyModel  {
    long timestamp;
    long currentValue;
    String title;
//getter/setter
}

<grid id="grid" rowRenderer="@{myRowRenderer}" model="@{win$MyController.modeList, load-after='statTimer.onTimer'}" sizedByContent="true">
</grid>
<timer id="statTimer" repeat="true" delay="3000"/>

class MyController extends GenericForwardComposer{
List<MyModel> modelList;
public void onTimer$statTimer(Event event) {

    modelList.clear();   
    repopulateModelList();
}

}