Struts redirect from model

Question

I'm trying to implement a security model where the model of secured pages inherits from a SecureSupport. I don't know how or if I can redirect from a constructor, however. See below:

public class SecureSupport extends ActionSupport {
    private Map session;

    public SecureSupport  throws Exception
    {
     session = ActionContext.getContext().getSession();

     if(!session.containsKey("User"))
     {
      // redirect from here
     }
     return SUCCESS;
    }

Answer 1

Make your own exception (ie NoUserException) which has to be a run time exception. Then catch this exception with global exception handler, there you can redirect anywhere you want.