What is a good embeddable Java LDAP server?

Question

I\'m working on a Java web application that integrates with a few other external applications that are deployed along with it. Authentication information must be synchronize

Answer 1

I've just spent a couple of days looking into exposing our internal application user db as an LDAP service. I looked initially at apache-ds, while it seems to be a very powerful directory service extending it to expose a relational db is mind numbingly complex.

Have settled on penrose as it seems to offer a pretty good solution, managed to prototype a solution in about 2 hours.