java/samples/src/main/resources/META-INF/persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
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 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
-->
<persistence version="1.0" 
  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_1_0.xsd"
  >
  
  <persistence-unit name="hibernate" transaction-type="RESOURCE_LOCAL">
  	<provider>org.hibernate.ejb.HibernatePersistence</provider>

     <properties>
		<property name="hibernate.hbm2ddl.auto" value="create"/>
		<property name="hibernate.show_sql" value="false"/>
		<property name="hibernate.connection.driver_class" value="org.apache.derby.jdbc.EmbeddedDriver"/>
		<property name="hibernate.connection.password" value=""/>
		<property name="hibernate.connection.url" value="jdbc:derby:target/hibernatedb;create=true"/>
		<property name="hibernate.connection.username" value="sa"/>
		<property name="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect"/>
     </properties>
  </persistence-unit>
  
  <persistence-unit name="hibernate_spi_testing" transaction-type="RESOURCE_LOCAL">
  	<provider>org.hibernate.ejb.HibernatePersistence</provider>

     <properties>
		<property name="hibernate.hbm2ddl.auto" value="create"/>
		<property name="hibernate.show_sql" value="false"/>
		<property name="hibernate.connection.driver_class" value="org.apache.derby.jdbc.EmbeddedDriver"/>
		<property name="hibernate.connection.password" value=""/>
		<property name="hibernate.connection.url" value="jdbc:derby:target/hibernatedb;create=true"/>
		<property name="hibernate.connection.username" value="sa"/>
		<property name="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect"/>
     </properties>
  </persistence-unit>
  
 <persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
  <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
 
  <!-- By default your mappings can be defined in orm.xml file, -->
  <!-- which is discovered automatically.                        -->                                     
  <exclude-unlisted-classes>true</exclude-unlisted-classes>
 
  <!--  properties are set in Bootstrap no here  -->
  <properties>
     <property name="eclipselink.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
     <property name="eclipselink.jdbc.url" value="jdbc:derby:target/eclipselinkdb;create=true"/>
     <property name="eclipselink.jdbc.user" value="sa"/>
     <property name="eclipselink.jdbc.password" value=" "/>
     <property name="eclipselink.target-server" value="None"/>
     
     <property name="eclipselink.jdbc.write-connections.min" value="1"/>
     <property name="eclipselink.jdbc.read-connections.min" value="1"/>
     <property name="eclipselink.logging.level" value="INFO" />
     <property name="eclipselink.logging.logger" value="JavaLogger"/>
     <property name="eclipselink.logging.timestamp" value="false" />
     <property name="eclipselink.logging.session" value="false" />
     <property name="eclipselink.logging.thread" value="false" />
     <property name="eclipselink.logging.exceptions" value="false" />
     <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
     <property name="eclipselink.ddl-generation.output-mode" value="both"/>
  </properties>
</persistence-unit>

<persistence-unit name="cayenne">
  <provider>org.apache.cayenne.jpa.Provider</provider>
 
  <!-- By default your mappings can be defined in orm.xml file, -->
  <!-- which is discovered automatically.                        -->                                     
  <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
      <property name="org.apache.cayenne.datasource.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
      <property name="org.apache.cayenne.datasource.jdbc.url" value="jdbc:derby:cayennedb;create=true"/>
      <property name="org.apache.cayenne.datasource.jdbc.username" value="sa"/>
      <property name="org.apache.cayenne.datasource.jdbc.password" value=" "/>
      <property name="org.apache.cayenne.datasource.jdbc.minConnections" value="1"/>
      <property name="org.apache.cayenne.datasource.jdbc.maxConnections" value="2"/>
      <property name="org.apache.cayenne.schema.create" value="true"/>
    </properties>
  </persistence-unit>
<persistence-unit name="openjpa">
  <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
 
  <!-- By default your mappings can be defined in orm.xml file, -->
  <!-- which is discovered automatically.                        -->                                     
  <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
      <property name="openjpa.ConnectionURL" value="jdbc:derby:openjpa;create=true"/>
      <property name="openjpa.ConnectionDriverName" value="org.apache.derby.jdbc.EmbeddedDriver"/>
      <property name="openjpa.ConnectionUserName" value="sa"/>
      <property name="openjpa.ConnectionPassword" value=""/>
      <property name="openjpa.Log" value="DefaultLevel=WARN, Tool=INFO"/>
    </properties>
  </persistence-unit>
</persistence>