On Sep 3, 2008, at 1:28 AM, Marco Laponder wrote:
Hi Everyone,
I am trying to build a custom login module where custom principals are
added to the subject. The login works as expected and on the commit I
add my specific principal object to the subject.
So far so good, but now I need to retrieve this object In my servlet
and
I was expecting to be able to retrieve it by
httpRequest.getUserPrincipal() but the principal returned is not an
instance of my custom principal. Can anyone given any tips how to find
out what I am doing incorrect or is this situation not possible at
all ?
You don't say if your login configuration includes any other login
modules. Assuming that it does not....
The specs don't describe how to pick the "UserPrincipal" from the
possibly numerous principals in a logged-in Subject. Geronimo uses
this code snippet:
Set<? extends Principal> principals =
subject.getPrincipals(GeronimoCallerPrincipal.class);
if (!principals.isEmpty()) {
context.principal = principals.iterator().next();
} else if (!(principals =
subject.getPrincipals(PrimaryRealmPrincipal.class)).isEmpty()) {
context.principal = principals.iterator().next();
} else if (!(principals =
subject.getPrincipals(RealmPrincipal.class)).isEmpty()) {
context.principal = principals.iterator().next();
} else if (!(principals = subject.getPrincipals()).isEmpty()) {
context.principal = principals.iterator().next();
}
So, the most reliable way to get your special principal returned as
the UserPrincipal is to have it implement the marker interface
GeronimoCallerPrincipal, and assure it is the only principal that
implements that interface.
Hope this helps
david jencks
Kind regards,
Marco Laponder
