persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="it-persistence-unit" transaction-type="RESOURCE_LOCAL">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
	<!--provider>org.hibernate.ejb.HibernatePersistence</provider-->
        <class>com.some.Entity</class>
        <properties>
            
            <!--property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" /-->
            <!--property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/Students_DB" /-->
            <property name="javax.persistence.jdbc.url" value="jdbc:derby:memory:testDB;create=true"/>
	    <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="" />
            <!-- vendor specific parameters -->
	    <property name="eclipselink.ddl-generation" value="create-tables"/>
            <property name="eclipselink.logging.level" value="INFO" />
	    <!--property name="eclipselink.target-database" value="MYSQL" /-->
	    <property name="eclipselink.target-database" value="DERBY" />	
        </properties>
    </persistence-unit>
</persistence>