How to get the HttpSession, HttpServletRequest in JSF. Set the attribute in the session or get a parameter from session.

Here is a snippet to show how can we get the HttpSession, HttpServletRequest in JSF. Set the attribute in the session or get a parameter from session.
 
FacesContext context = FacesContext.getCurrentInstance(); 
HttpServletRequest request = (HttpServletRequest)context.getExternalContext().getRequest(); 
HttpSession httpSession = request.getSession(false); 

// To get the attribute
String testParam= (String) httpSession.getAttribute("testParam");

// To set the param
httpSession.setAttribute("testParam", "testValue");