Design

We will put a message-driven bean (MDB) called Transfer in front of the Banking session bean (facade) as an asynchronous entry point to the same business logic (Figure 16-1).

Figure 16-1. MDB design overview

  • To let the Transfer distinguish between the different methods that it can process, we send a JMS string property along with the message.

  • For our example, we implement only the transfer method. This method requires three parameters (fromAccount, toAccount, and amount) that we package into a TransferDataObject, which is a serializable JavaBean.

  • We put the TransferDataObject into a JMS message and put the message on the queue that the ...

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