if (request.getParameter("gamePagina") != null) {
            String gameId = request.getParameter("gamePagina");
            try {
                emf = Persistence.createEntityManagerFactory("designPatternsPU");

                EntityManager em = emf.createEntityManager();
                Game game = em.find(Game.class, Long.parseLong(gameId));


                em.close();

                request.setAttribute("game", game);
                RequestDispatcher rd = request.getRequestDispatcher("gameDetail.jsp");
                rd.forward(request, response);

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                out.close();
                emf.close();
            }
        }