title: org.apache.catalina.authenticator.SingleSignOn valve portability
body: <p>I am thinking of using the tomcat <code>org.apache.catalina.authenticator.SingleSignOn</code> valve for my single sign on, as documented <a href="http://tomcat.apache.org/tomcat-6.0-doc/config/host.html#Single_Sign_On" rel="nofollow">here</a></p>
  
  <p>If I go with this approach, what would I need to do to my applications if I decide to move my application from tomcat to another web container such as jboss, glassfish, weblogic, or websphere?</p>