Kotlin for Enterprise Applications using Java EE

Bootstrapping the JPA

In order to bootstrap the JPA process in a server environment, we don't have to do much. We just have to configure one XML file, which is the  persistence.xml file under resources/META-INF. We define one persistence unit for a database. We can then define the JPA entities. An example of persistence.xml is shown here:

<?xml version="1.0" encoding="UTF-8"?><persistence version="2.1"             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_1.xsd">    <persistence-unit name="prod">        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>        <class>org.rao.kotlin.entity.Person ...