import javax.faces.context.FacesContext;

public void addInSession() {
MySession mySession = new MySession();
mySession.setName(getMsg());

/* .getSession(boolean), true if we want to create new session, if want touse oldsession then false*/
FacesContext context = FacesContext.getCurrentInstance();
HttpSession session = (HttpSession) context.getExternalContext().getSession(false);
session.setAttribute("sessionObj", mySession);

if (session.getAttribute("sessionObj") != null) {
MySession mySavedSession = (MySession) session.getAttribute("sessionObj");
System.out.println("HTTP Session: " + mySavedSession.getName());
} else {
// do something
}
}