我正在尝试在更改任何属性后观察@SessionScoped组件。 HttpSessionAttributeListener不会触发cdi托管组件中的更改。
@SuppressWarnings("serial")
@SessionScoped
public class TestSession implements Serializable {
private User user;
public TestSession() {
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
示例Servlet：
@SuppressWarnings("serial")
@WebServlet(name = "demo", urlPatterns = "/demo")
public class DemoServlet extends HttpServlet {
private static final Logger logger = LoggerFactory.getLogger(DemoServlet.class);
@Inject
private TestSession testSession;
@Override
protected void doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
throws ServletException, IOException {
User user = new User(1L,new Role(1L));
user.setId(RandomUtils.nextLong());
testSession.setUser(user); //listen that component change something
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/WEB-INF/jsp/demo.jsp");
dispatcher.forward(httpServletRequest, httpServletResponse);
}
}
组件更改任何属性时是否可以监听？有人有办法做到这一点吗？
重要提示：我无权访问TestSession java类或servlet上的重写或添加代码。