In JBoss 5.1, we used JMX to monitor the number of active sessions and few other statistics per session (last accessed time, ...) in our web application using jboss.web MBean activeSessions and listSessionIds to iterate over sessions and call getLastAccessedTime method.
In WildFly 8.1, I found activeSessions attribute of jboss.as.expr:deployment=tcl.war,subsystem=undertow that returns the number of active sessions but I could not find a way to retrieve the list of session Ids, it seems this was provided by Tomcat in Boss 5.1 and maybe Undertow does not provide an equivalence.
Did I miss something?