EclipseLink/Examples/JPA/Derby

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Running EclipseLink on the Derby Database

  • Running EclipseLink on derby has several advantages including ease of installation and small footprint for rapid development - and the fact that it is also open source like EclipseLink.
  • This tutorial is currently working with Derby 10.5.3.0.

Embedded Derby Driver VS Derby Client

Retrofitting an existing Java SE application to use Derby

WebLogic Server Console configuration

Weblogic derby jta datasource setup.JPG

EE persistence.xml

<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="example" transaction-type="JTA">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <jta-data-source>localJTA</jta-data-source>
        <!-- optional --><class>org.eclipse.persistence.example.business.Cell</class>
        <properties>
            <!-- optional --><property name="eclipselink.target-database" 
                      value="org.eclipse.persistence.platform.database.DerbyPlatform"/>
            <property name="eclipselink.target-server" value="WebLogic_10"/>
            <property name="eclipselink.logging.level" value="FINEST"/>
        </properties>       
    </persistence-unit>
</persistence>

SE persistence.xml

<?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="dao.create.tables.derby" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>org.eclipse.persistence.example.jpa.server.business.Cell</class>
    <properties>
      <property name="eclipselink.target-database" value="Derby"/>            
      <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
      <property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/weblogic;create=true"/>
      <property name="javax.persistence.jdbc.user" value="APP"/>
      <property name="javax.persistence.jdbc.password" value="APP"/>
      <property name="eclipselink.logging.level" value="ALL"/>            
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
      <property name="eclipselink.ddl-generation.output-mode" value="database"/>
    </properties>
  </persistence-unit>
</persistence>

Add derby jars

  • SE: Add derbyclient.jar to the application classpath
  • EE: Add derby jars to the application server classpath (Example: for WebLogic place in the modules directory)

References

  • Originated 20091113 for Derby 10.5.3.0