Access request Attributes (Set in a managed bean before redirecting) to the Filter, previously creating FacesContext

Question

I set the request attribute in a managed bean before redirecting the request through faces-config as follows:

FacesContext.getCurrentInstance().getExternalContext().getRequestMap().put("foo","bar");

return "redirect_success";

After that, I try to access this request attribute in my filter by first creating FacesContext

FacesContext.getCurrentInstance().getExternalContext().getRequestMap().get("foo");

Finally, you cannot get this attribute in the filter itself, but I can get the same attribute again in the second managed bean very easily. Is there any way to get it in the filter itself?

Answer 1

Two ways:

• Save the session and let the filter remove it from the session, if necessary.

  externalContext.getSessionMap().put("foo", "bar");
  

  , , FacesContext Filter. ServletRequest HttpServletRequest.

  HttpSession session = ((HttpServletRequest) request).getSession();
  String foo = (String) session.getAttribute("foo");
  session.removeAttribute("foo");
  

• ExternalContext#redirect(), .

  externalContext.redirect("other.jsf?foo=bar");
  

  Filter:

  String foo = ((HttpServletRequest) request).getParameter("foo");