Applied Enterprise JavaBeans™ Technology

18.4. A simple resource adapter

In this section, we will describe the implementation and testing of a simple, but complete, resource adapter. This will provide EJBs with access to a stock quote server, as described at the start of this chapter. This is a ‘real’ resource adapter in that it does communicate with an external resource using a custom protocol; it is not just ‘Hello World’ in a connector. To test the resource adapter, we will need to implement an EJB that uses it, and a test client for the EJB. For the purposes of testing, we will also use a ‘dummy’ quote server that runs on the local machine. Because the example is already complicated enough, this simulated server won’t do authentication. Figure 18.6 summarizes the software components ...