从另一个请求范围的bean实例化一个会话范围的托管bean

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);
        }

        // ...
    }

}

Answer 2

Set the user property of your usersession bean upon login. It does not matter if it is instanciated before login, because its user property will remain null until login is done.

And inject usersession bean in your request coped beans with @javax.inject.Inject annotation.