META-INF/persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<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_2_0.xsd"
     version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
     <persistence-unit name="MyDB" transaction-type="RESOURCE_LOCAL">
          <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
          <class>com.wpollock.jpademo.Book</class>
          <properties>
               <property name="jakarta.persistence.jdbc.driver"
                  value="org.apache.derby.jdbc.EmbeddedDriver" />
               <property name="jakarta.persistence.jdbc.url"
                    value="jdbc:derby:MyDB;create=true" />
               <property name="jakarta.persistence.jdbc.user" value="hymie" />
               <property name="jakarta.persistence.jdbc.password" value="secret" />

               <!-- EclipseLink extensions: -->
               <property name="eclipselink.logging.level" value="OFF"/>
               <property name="eclipselink.ddl-generation"
                  value="drop-and-create-tables"/>
          </properties>
     </persistence-unit>
</persistence>