is there any other possibilities for singletons into EJB 3.0 ?
You can use @Service in JBoss. See this for more details http://docs.jboss.org/ejb3/app-server/reference/build/reference/en/html/jboss_extensions.html
Thank you very much jaikiran.
this is exactly what i needed.
Does anyone know if there is a way to use another EJB 3.1' new feature - @Asynchronous on Session bean under current JBoss EJB 3.0 version? Right now the only alternative is to use a MDB.
We're working on the EJB 3.1 features now, but have not yet released a roadmap.
JBoss does provide client-driven asynchronous invocations, take a look at our Unit Tests (works w/ EJB3 in AS 5.0.0.GA):
Note that this will work with any object, not just EJB3 Proxies.