Can an EJB send asynchronous notifications to its clients?

Can an EJB send asynchronous notifications to its clients?
Asynchronous notification is a known hole in the first versions of the EJB spec. The recommended solution to this is to use JMS, which is becoming available in J2EE-compliant servers. The other option, of course, is to use client-side threads and polling. This is not an ideal solution, but it’s workable for many scenarios. 

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