Inject @SessionScoped value into filter with Guice

问题

I have a class hold value of a user in session

 @SessionScoped
 class UserSession{}

Now I have a LoginFilter to ensure some url accessed with user login

class LoginFilter{
   @Inject UserSession userSession;
   ...
}

Then Out of scope exception was thrown when I try to bootstrap jetty. How can I check if the session contains the UserSession object? I don't know the attribute name of UserSession class.

回答1:

You can inject a Provider<UserSession> instead of a plain UserSession.

来源：https://stackoverflow.com/questions/17333790/inject-sessionscoped-value-into-filter-with-guice