A cross domain Single sign on & Single log out authentication example using Spring Session. Read this post.
#Running the app# This is just a regular spring boot, maven project, created in STS 3.8. So easiest way is to import it into STS or any other Eclipse based IDE.
Run the login server first and open it on http://localhost:8080.
Client1 app will run on the port 9090, but run it http://127.0.0.1:9090/ not localhost, so
these 2 apps won't share session id from the browser