Day 10. Message-Driven Beans

So far, you have looked at two types of Enterprise JavaBeans (EJB)—the Session bean and the Entity bean. Today you will consider the third and final EJB, the Message-Driven bean. The following topics are covered:

  • Similarities and differences with Entity and Session beans

  • The life-cycle of a Message-Driven bean

  • Writing a Message-Driven bean

Prior to the EJB 2.0 specification, it was not possible to support asynchronous message passing. All EJB method calls had to be synchronous and initiated by the client.

With J2EE 1.3 and later versions, you can use Message-Driven beans to combine the functionality of EJBs with the Java Message Service (JMS) to support asynchronous communication.

Although JMS was covered in detail ...

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