Question

I need to instantiate a session bean from another request scoped bean & set values to that bean. How can I do that from another bean ?

Actually I need to instantiate the usersession bean after user has successfully logged in & I need to set the user managed property of that session bean.

Answer 1

You need to manually instantiate it the usual way and put it in ExternalContext#getSessionMap():

UserSession userSession = new UserSession();
userSession.setUser(user);
externalContext.getSessionMap().put("userSession", userSession);

In name of proper design, I’d rather delegate the job to JSF by just injecting it as @ManagedProperty:

@ManagedBean
@RequestScoped
public class Login {

    @ManagedProperty("#{userSession}")
    private UserSession userSession;

    public String login() {
        // ...

        if (user != null) {
            userSession.setUser(user);
        }

        // ...
    }

}