Java – using cookies in struts 2 and struts

I have the following (shortened) struts 2 actions:

public class MyAction extends BaseAction implements CookiesAware {

  public String execute() {

    if (cookiesMap.containsKey("BLAH"))
      blah=Integer.parseInt(cookiesMap.get("BLAH"));

      return "success";
  }

  // For handling cookies
  Map<String,String> cookiesMap;
  @Override
  public void setCookiesMap(Map<String,String> cookiesMap) {
    this.cookiesMap = cookiesMap;
  }
}

When I do 'cookiemap When 'containskey', I get a null pointer exception - in my opinion, setcookiesmap is not called I've implemented the cookiesaware interface, so I think it should be called - what did I miss here?

thank you

Solution

It seems that struts only supports reading cookies. You have to go to the servlet response to actually set a cookie

Finally, I have chosen to bypass Struts2 cookie support completely and go directly to the servlet request / response object for reading and writing:

public class MyAction extends ActionSupport implements ServletResponseAware,ServletRequestAware {

  public int division;

  public String execute() {

    // Load from cookie
    for(Cookie c : servletRequest.getCookies()) {
      if (c.getName().equals("cookieDivision"))
        division=Integer.parseInt(c.getValue());
    }

    // Save to cookie
    Cookie div = new Cookie("cookieDivision",String.format("%d",division));
    div.setMaxAge(60*60*24*365); // Make the cookie last a year
    servletResponse.addCookie(div);

    return "success";
  }

  // For access to the raw servlet request / response,eg for cookies
  protected HttpServletResponse servletResponse;
  @Override
  public void setServletResponse(HttpServletResponse servletResponse) {
    this.servletResponse = servletResponse;
  }

  protected HttpServletRequest servletRequest;
  @Override
  public void setServletRequest(HttpServletRequest servletRequest) {
    this.servletRequest = servletRequest;
  }
}

And in struts XML or web There is no configuration of this method in XML, which is a benefit So I'm satisfied with this solution, even if it draws struts 2. 0 in bad light