Creating a JPA project
We generate the JPA entities from the ITSOBANK database into a JPA project. JPA projects are basically utility projects that hold the Java classes, which represent the JPA entities.
To create the JPA project, perform these steps:
| In the New Project wizard, select JPA Æ JPA Project, and click Next.
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| In the New JPA Project wizard, JPA Project page (Figure | 2-1):
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Type RAD75JPA as Project name.
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For Target Runtime, select WebSphere Application Server v7.0.
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For Configuration, select Utility JPA project with Java 5.0.
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Clear Add project to an EAR.
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Click Next.
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Figure 12-1 New JPA Project
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| In the New JPA Project wizard, JPA Facet page (Figure | 2-2):
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For Platform select RAD JPA Platform.
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For Connection select ITSOBANKderby. If the connection is not active, click Connect.
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Clear Override default schema from connection (ITSO is the schema).
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For JPA implementation, select Use implementation provided by the server runtime.
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For persistent class management select Discover annotated classes automatically.
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Click Finish.
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Figure 12-2 JPA Facet
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| When prompted to switch to the JPA perspective, click Yes.
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| The RAD75JPA project is created.
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| Two files are created in the src/META-INF folder:
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An empty orm.xml file that can be used for explicit mapping of entities to database tables.
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<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="RAD75JPA">
</persistence-unit>
</persistence>
This file holds the persistent entity classes.