Emmanuel Proulx continues his series on EJB inheritance with part 4. "So far, we've seen how inheritance can be used when calling an EJB directly through RMI. However, SOAP (web services) and JMS also allow you to invoke objects remotely. Recognizing this, the EJB committee introduced JMS consumer beans (message-driven beans) in version 2.0 of the specification, and, in version 2.1, a generic asynchronous mechanism allowing web service invocations. This article discusses the steps involved in using inheritance in message-driven beans."

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