examples/tasklist-model/src/main/resources/META-INF/persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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_2_0.xsd">
    
    <persistence-unit name="tasklist" transaction-type="JTA">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        
        <!-- Only used when transaction-type=JTA -->
        <jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=tasklist)</jta-data-source>
        
        <!-- Only used when transaction-type=RESOURCE_LOCAL -->
        <non-jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=tasklist)</non-jta-data-source>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
            <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
        </properties>
    </persistence-unit>

</persistence>