Access session scoped JSF managed bean in web filter

Question

I have SessionScoped bean called userSession to keep track of the user ( username, ifLogged, etc). I want to filter some pages and therefore I need to access the bean from the webFilter I created. How do I do that? I looks like its even impossible to import the bean to be potenitally visible.

Pentagrid

Related: How can I get session scoped bean in filter from session? (jsf 2.1) – Crepuscular

Answer 1

Under the covers, JSF stores session scoped managed beans as an attribute of the HttpSession with the managed bean name as key.

So, provided that you've a @ManagedBean @SessionScoped public class User {}, just this should do inside the doFilter() method:

HttpSession session = ((HttpServletRequest) request).getSession(false);
User user = (session != null) ? (User) session.getAttribute("user") : null;

if (user != null && user.isLoggedIn()) {
    // Logged in.
}

Or, if you're actually using CDI instead of JSF to manage beans, then just use @Inject directly in the filter.

See also:

• Get JSF managed bean by name in any Servlet related class
• Prevent accessing restricted page without login in Jsf2

Endbrain

What can I tell you @Endbrain you should be awarded as the Master of JSF. – Inoperable

@BalusC: And how can I check whether the CDI injected (session) bean has been instantiated or not without calling a method on that bean (which would create the bean if it doesn't exist yet)? session.getAttribute(<userBean>) doesn't work with CDI. Thx. – Gerdes

Answer 2

As an alternative you can use CDI-beans and inject your sessionbean normally.

Arango