extending Action problems

[Billy Ng]

I make a mistake on extending the Action.  I have the following code to set the 
parameters in the perform() to the setters.  At first,  I wanted whichever the classes 
that extends ActionBase can get the parameters by simply calling the getters.  
However, the Action is a singleton, the instance variables will be used by all 
actions.  Anybody can give me suggestion to make the getters to return the mapping, 
form, req, and resp as local variables?

Thanks!

public class ActionBase extends Action {

    private ActionMapping mapping;
    private ActionForward actionForward;
    private ActionForm form;
    private HttpServletRequest req;
    private HttpServletResponse resp;
    private String view;

    protected void process() throws Exception {}

    public ActionForward perform(ActionMapping mapping,
                                 ActionForm form,
                                 HttpServletRequest req,
                                 HttpServletResponse resp) {

        setActionMapping();
        setActionForm(data);
        setRequest(req);
        setResponse(resp);
        process();
   }

    protected void setActionMapping(ActionMapping mapping) {
        this.mapping = mapping;
    }

    protected ActionMapping getActionMapping() {
        return this.mapping;
    }

    protected void setRequest(HttpServletRequest req) {
        this.req = req;
    }

    protected HttpServletRequest getRequest() {
        return this.req;
    }

    protected void setResponse(HttpServletResponse resp) {
        this.resp = resp;
    }

    protected HttpServletResponse getResponse() {
        return this.resp;
    }
}