JBoss Application Initialization

I have a question about startup of my java ee application in JBoss.  I keep track of whether users are 'logged in' in my database.  Every time JBoss restarts, I want all the logged in booleans to be set to false.  Where do I put application initialization code in JBoss?

I saw a post that inidicated using a Servlet that loads on startup, but surely there is a way to do this without getting the web container involved?

Thanks.