Personal web server - 50 Chapter 2 Home Interfaces Local Interfaces Enterprise
50 Chapter 2 Home Interfaces Local Interfaces Enterprise Bean Remote Interfaces Jar File Creator EJB Jar File Classes Deployment Descriptor Vendor-specific files Figure 2.7 Creating an Ejb-jar file. There are already a number of tools available to autogenerate Ejb-jar files, such as Java IDEs. You can also generate these files yourself we ll show you how in Chapter 3. Once you ve made your Ejb-jar file, your enterprise bean is complete, and it is a deployable unit within an application server. When they are deployed (perhaps after being purchased), the tools that EJB container vendors supply are responsible for decompressing, reading, and extracting the information contained within the Ejb-jar file. From there, the deployer has to perform vendor- specific tasks, such as generating EJB objects, generating home objects, importing your bean into the container, and tuning the bean. Support for Ejbjar files is a standard, required feature for all EJB tools. Note that you can have more than one bean in an Ejb-jar file, allowing you to ship an entire product set of beans in a single jar file. Summary of Terms For your convenience, we now list the definitions of each term we ve described so far. As you read future chapters, refer to these definitions whenever you need clarification. You may want to bookmark this page. The enterprise bean instance is a Java object instance of an enterprise bean class. It contains business method implementations of the methods defined in the remote or local interface. The enterprise bean instance is
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