jigsaw wrote:
to hitaco abt exceptions:
no matter DAO/EJB throws RuntimeException or checked exception,
client class is expected to catche them, since exceptions are return from method.
However SQLException contains not enought infos abt wot's happening,
so we have to wrap it w/ app-spec exception to tell client class wot's
going on there.
if a wrapper of low level exception is not able to tell in a non-ambiguous way, it should be defined as a runtime exception which means client dont have to catch it, just let CMT to rollback and display a common error message to end user.