mailiverse/deploy/james/apache-james-conf/META-INF/persistence-template.xml

<?xml version="1.0" encoding="UTF-8"?>
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<persistence 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"
    version="2.0">

    <persistence-unit name="James" transaction-type="RESOURCE_LOCAL">
    
    <!-- Use the mappings to overwriting the annotations defined in the JPA domain classes -->
    <mapping-file>META-INF/jpa-mappings-template.xml</mapping-file>

        <!-- Mailbox stuff-->
        <class>org.apache.james.mailbox.jpa.mail.model.JPAMailbox</class>
        <class>org.apache.james.mailbox.jpa.mail.model.JPAUserFlag</class>
        <class>org.apache.james.mailbox.jpa.mail.model.openjpa.AbstractJPAMessage</class>
        <class>org.apache.james.mailbox.jpa.mail.model.openjpa.JPAMessage</class>
<!-- 
        <class>org.apache.james.mailbox.jpa.mail.model.openjpa.JPAEncryptedMessage</class>
-->

        <!-- This needs to get used when you want to use streaming. Remember to comment the following classes
             org.apache.james.mailbox.jpa.mail.model.JPAMessage
             If you don't do this the EntityManager will get confused!
        <class>org.apache.james.mailbox.jpa.mail.model.openjpa.JPAStreamingMessage</class>
        -->
        <!-- Comment if you want to use streaming -->
        <class>org.apache.james.mailbox.jpa.mail.model.openjpa.JPAMessage</class>

        <class>org.apache.james.mailbox.jpa.mail.model.JPAProperty</class>
        <class>org.apache.james.mailbox.jpa.user.model.JPASubscription</class>

        <!-- DomainList -->
        <class>org.apache.james.domainlist.jpa.model.JPADomain</class>

        <!-- User-->
        <class>org.apache.james.user.jpa.model.JPAUser</class>

        <!-- RecipientRewrite -->
        <class>org.apache.james.rrt.jpa.model.JPARecipientRewrite</class>

        <properties>
            <!--  Create tables on startup -->
            <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
            <!--  Create foreign keys on startup -->
            <property name="openjpa.jdbc.MappingDefaults" value="ForeignKeyDeleteAction=cascade, JoinForeignKeyDeleteAction=cascade"/>
            <!--  Reorder SQL statements to satisfy database foreign key constraints -->
            <property name="openjpa.jdbc.SchemaFactory" value="native(ForeignKeys=true)"/>
            <!--  Disable query cache for now. It seems to be buggy. -->
            <!--  See http://www.mail-archive.com/server-dev@james.apache.org/msg28802.html -->
            <!--  See https://issues.apache.org/jira/browse/OPENJPA-1827 -->
            <property name="openjpa.jdbc.QuerySQLCache" value="false"/>
            <!--  Uncomment this if you want to see the generated SQL in the console.
            <property name="openjpa.Log" value="SQL=TRACE"/>
            -->
            <!--  Uncomment this if you want to get verbose OpenJPA log the console.
            <property name="openjpa.Log" value="DefaultLevel=TRACE"/>
            -->
        </properties>

    </persistence-unit>

</persistence>