Writing Your First (Java hosting) Bean 73 The actual parameters
Writing Your First Bean 73 The actual parameters you need should be part of your EJB container s documentation. See the book s accompanying source code for examples of this. For your EJB client code to work, you must take care to distribute the correct class files on the right machines. If remote client code uses home interfaces and remote interfaces, then you must deploy those class files and the necessary client stub classes in your client environment. And because clients never directly access your bean implementation, you should not deploy your bean classes in your client environment. The Server-Side Output When we run the client, our container shows the following debug log. (Debug logs are great for seeing what your enterprise beans are doing.) setSessionContext() ejbCreate() hello() ejbRemove() As you can see, the container associated our bean with a session context, called create(), delegated a business method to the bean, and then called remove(). Note that some containers may give slightly different output than others it s all implementation-specific and part of EJB product differentiation. Keep this in mind when debugging your beans. The Client-Side Output After running the client, you should see the following output: Hello, World! Implementing Component Interfaces We wrap up this chapter with a quick design strategy. As you probably noticed, our enterprise bean class does not implement its own component interface (either remote interface or local interface). But why not? Doesn t the component interface seem like a natural fit for the interface to your bean? After all, the component interface defines every business method of the bean. Implementing your component interface would be a nifty way to perform compile-time checking to make sure your bean s method signature matches your component interface s signature.
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