persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
        http://xmlns.jcp.org/xml/ns/persistence/persistence_2_2.xsd" version="2.2">

    <persistence-unit name="MyTest">
        <!-- Add all of your model classes here -->
        <class>mydomain.model.Person</class>
        <exclude-unlisted-classes />
        <properties>
            <!-- Update these datastore details if different -->
            <property name="javax.jdo.PersistenceManagerFactoryClass" value="org.datanucleus.api.jdo.JDOPersistenceManagerFactory"/>

            <property name="javax.jdo.option.ConnectionURL" value="jdbc:h2:mem:nucleus"/>
            <property name="javax.jdo.option.ConnectionUserName" value="sa"/>
            <property name="javax.jdo.option.ConnectionPassword" value=""/>

            <property name="datanucleus.schema.autoCreateAll" value="true"/>
            <property name="datanucleus.schema.generateDatabase.mode" value="drop-and-create"/>
        </properties>
    </persistence-unit>

</persistence>