Getting Started with WebSphere Application Server

Note:
Chapter 5 – Enterprise Java Beans 97
The configuration id for server and client environments should be different.
The application client with its deployment plan can be packaged as a jar file. Figure 5.2
provides an example of a jar file structure. All the class files are built by Eclipse
automatically from the source code created above; geronimo-application-client is
the deployment plan for this application client.
Figure 5.2 - Jar file structure of an application client with its deployment plan
Deploy and run the application client with this command.
java -jar /bin/client.jar [PATH to application client]
For example:
java -jar /bin/client.jar
HelloAppClient/HelloEJBAppClient
5.4 Java Persistence API Entities Development in Community Edition
Java Persistence API (JPA) is a new API as part of the Java EE 5 platform for data
persistency. Although JPA is part of EJB 3.0, its development process is quite different
from an EJB. This section describes how to develop JPA entities in Community Edition.
There are two methods to create JPA entities:
• Create JPA entities manually with JPA annotations
• Generate JPA entities from tables of a database
5.4.1 Creating JPA entities manually
To create JPA entities manually, you need to use the annotation defined in the JPA
specification. All the annotations defined there, such as @Entity, @EntityManager,
@PersistenceUnit and so on, can be used in your JPA classes.