7.12. Managing exceptions

EJB specifies well-defined rules to control whether an exception immediately marks the current transaction for rollback, when thrown by a business method of the bean. System exceptions always cause a transaction rollback. Application exceptions do not cause a rollback by default, but they will cause a rollback if @ApplicationException(rollback=true) is specified. (An application exception is any checked exception, or any unchecked exception annotated @ApplicationException. A system exception is any unchecked exception without an @ApplicationException annotation.)

Seam also applies the EJB3 exception rollback rules to Seam JavaBean components.

These rules apply only in the Seam component layer. When an exception occurs outside the Seam component layer, Seam rolls back any active transaction.