Files of this type are standard for JPA, and are used for registration of persistent entities and configuration of ORM framework parameters.
persistence.xml file of the project is defined 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"> <class>com.sample.sales.entity.Customer</class> <class>com.sample.sales.entity.Order</class> </persistence-unit> </persistence>