On Thu, Oct 1, 2015 at 11:26 AM, Christian Mueller <
christian.mueller@anonymised.com> wrote:
Hi
About the restart. The security subsystem caches the the roles of a user
(and the roles derived from group membership) for performance reasons. This
holds true for stateless authentication (e. g. Basic Authentication) and
for session cookies (interactive login). Otherwise we would pay a high
performance penalty for each request. Look at the J2EE architecture,
(web.xml as an example). If you change the security settings in the web.xml
file you have to restart the container.
I understand the need for performance reasons, but don't we have a way to
either drop the caches, or to quickly check if the user roles got modified?
For example, in GeoFence we have a cache of the authorization results for
performance reasons, but the cache is short lived and there is a REST call
that can be used to drop it immediately.
Having roles cached until the user logs out (I do hope a logout clears the
cache, right?) seems like a security liability.
About the group concept. I think it is not the best idea to assign rules
to users directly. IMHO a good practice is to assign roles to user groups
and configure group membership for individual users.
I see where you're going with this, it implies a uniformity of roles for
the users in the group, and the notion that when a change is made, it's
made for all users in the group.
Makes sense.
Again, this is not my concept, it is a J2EE concept.
Erk, J2EE has been wrong in some many ways over the last 15 years that I
normally associate it with "slow to build, slow to run, outdated in design".
I'd certainly would never defend an idea by associating it with J2EE 
Cheers
Andrea
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