persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
    <persistence-unit name="ztpPersistenceUnit" transaction-type="JTA">
        <class>model.Book</class>
        <class>model.Author</class>
        <class>model.Counter</class>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>
        <jta-data-source>ztpDataSource</jta-data-source>
        <properties>
            <property name="eclipselink.ddl-generation" value="create-tables"/>
        </properties>
    </persistence-unit>
</persistence>