This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
There isn't anything special you have to do in your Spring application.
As far as your Quartz job within JBoss, then that is a JBoss question. But if you deploy your app in three JBoss servers set up in a cluster. Do you want your job running three times or just once. If just once then your Quartz service on JBoss should be put in the HA-singleton directory, so it only runs once, but if that server crashes the service is moved to one of the other machines.