programmatic way to invoke authentication?

[Aditya]

Is there a programmatic way to force a user to authenticate without using a
security-constraint in web.xml? It seems like I should be able to do something
like:

  String myremotename = request.getRemoteUser();
  if (myremotename == null){
    LoginConfig myconfig = new LoginConfig();
    myconfig.setAuthMethod("FORM");
    myconfig.setErrorPage("/admin/error.html");
    myconfig.setLoginPage("/admin/Login");
    myconfig.setRealmName("My Login");
    if (authenticate(request, response, myconfig)){
      return;
    }
  } else {
    out.println("username: " + myremotename + "<br>");
  }

but needless to say, that doesn't work -- I've been through the javadocs and
source and can't figure it out. hints?

Thanks,
Adi

 

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