Spring Security, sign out of multiple applications at once

Question

I have three separate applications that are all secured with spring security. When a user logs out of the main application, I need to also make sure they're logged out of the api application and a social widget application as well. Right now, I've set the logout success url of the primary application to the logout url of the second, and so on. There must be a better way?

Answer 1

The first question is, how do your users log in to your applications? Is there some single sign-on solution in place? If so, this solution should also address single sign-out.

Your question is tagged with CAS: CAS not only supports Single Sign-On, but also Single-Sign Out.