struts2 + jfreechart + jsp : lost request parameters in action which generates Jfreechart -

1)i called action generates jfreechart using next jsp(using tiles) code :

<s:url  var="chart" action="resultchart"/> <img src="<s:property value="%{chart}"/>"/> 

2)struts.xml

<package name="chart" extends="jfreechart-default" namespace="/">      <action name="resultchart" class="com.examples.actions.chartaction">         <result name="success" type="chart">              <param name="width"> 1200 </param>              <param name="height"> 600 </param>         </result>     </action>  </package> 

3)to generate chart - use request parameters previous action :

public class chartaction extends actionsupport implements requestaware {      private static final long serialversionuid = 1l;      private map request;      private jfreechart chart;         public string execute() throws exception {           databean databean = (databean)request.get("databean");                 .....         } 

my problem next : cant draw chart because request return null(databean=null) note : without passing request parameters works fine

my research - used next code in chartaction(before request.get) investigate problem:

valuestack valuestack = actioncontext.getcontext().getvaluestack();  system.out.println("valuestack.size() = " + valuestack.size());  system.out.println("valuestack root = " + valuestack.getroot().tostring()); 

and saw in valuestack no records action put parameter(databean) request

please help