If you’re deploying business logic to an EJB container, you’re probably dealing with some durable transactional stuff that’s needed by the customer. You need som ACID baby!
Atomicity – do it all or don’t do anything at all.
Consistency – Ensure everything is left integral.
Isolated – Nothing else should alter or interfere.
Durable – persist prior to finishing.
For financially significant applications you need transactions – with four quality attributes together: ACID.
