Implementing SSO with SAML and JBoss

Question

I want to implement SSO with SAML tokens in JBossAS.

The scenario is as follows.

1. I have 2 applications app1 and app2 running on 2 JBoss instances.
2. Login into app1 and enter username / password using form based auth.
3. Once login, click on the link that should be redirected to the app2 page.
4. This should use SSO with SAML tokens on JBossAS for authentication and authorization of users.

Can anyone let me know how to do this?