CustomRealm without listing Group Members

Question

Hi,
we are considering to implement a custom security realm. We have a fixed number
of groups to be used in ACLs. Users are stored in an LDAP server.
Group membership depends on some information on the individual user which needs
to be gathered from a separate backend system. Therefore, it is not feasible to
implement the getMembers() method on the Group class since that means iterating
over all "user records" in the backend system.
Here my question:
1. Is the getMembers() method needed for Authorization and/or Authentication or
can we simply make it return an empty list? (We do not mind if we do not see group
members in the administration console.)
2. Is it a good idea at all to have this kind of group definition?
3. What about the method "getUsers" for the ListableRealm? Is this one needed
for Authorization/Authentification. This method poses a similar problem.
Regards,
Andreas

Answer 1

1. Is the getMembers() method needed for Authorization and/orAuthentication or
can we simply make it return an empty list? (We do not mind if we do notsee group
members in the administration console.)I think this method is not needed at all for authentication and
authorization, it's only used to list the users in the WL admin page.
3. What about the method "getUsers" for the ListableRealm? Is this oneneeded
for Authorization/Authentification. This method poses a similar problem.Same answer.