A.7. persistence.xml

Files of this type are standard for JPA, and are used for registration of persistent entities and configuration of ORM framework parameters.

A set of persistence.xml files, including the ones defined in base projects, is declared in the cuba.persistenceConfig application property.

When the Middleware block starts, the specified files are combined into a single persistence.xml, stored in the application work folder. File order is important, because each subsequent file in the list can override previously defined ORM parameters.

Example of a file:

<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
  <persistence-unit name="sales" transaction-type="RESOURCE_LOCAL">