Options to communicate between WARs in the same EAR

Question

What options do you have to communicate between the WARs in an EAR? We have several WARs providing different webservices deployed within one EAR. For their tasks they need

Answer 1

Two things come to mind

1. There's JMS for sending signals.
2. EJB could record shared information.
3. A lib jar in the EAR's lib directory.

If you just need shared methods, 3 is what you want. But your edit points tells me you've got shared functionality that operates on shared data. For example, you've got user records that both WARs access and update. If so, you want an EJB.