Spring 3 Annotation-Based Transaction Manager Configuration for Hibernate

dao-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:jee="http://www.springframework.org/schema/jee"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:security="http://www.springframework.org/schema/security"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
      http://www.springframework.org/schema/context 
      http://www.springframework.org/schema/context/spring-context-2.5.xsd
      http://www.springframework.org/schema/jee
      http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
      http://www.springframework.org/schema/security 
      http://www.springframework.org/schema/security/spring-security-2.0.1.xsd">

	<!-- ******************************************************************** -->
	<!-- Mark bean transactions as annotation driven -->
	<!-- ******************************************************************** -->
	<tx:annotation-driven transaction-manager="transactionManager" />

	<!-- ******************************************************************** -->
	<!-- PropertyConfigurer for the DAO -->
	<!-- ******************************************************************** -->
	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="classpath:db.properties" />
	</bean>

	<!-- ******************************************************************** -->
	<!-- Setup the transaction manager -->
	<!-- ******************************************************************** -->
	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
		<property name="entityManagerFactory" ref="entityManagerFactory" />
	</bean>

	<!-- ******************************************************************** -->
	<!-- Setup each data source -->
	<!-- ******************************************************************** -->
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="${connection.driver_class}" />
		<property name="url" value="${connection.url}" />
		<property name="username" value="${connection.username}" />
		<property name="password" value="${connection.password}" />
	</bean>

	<!-- ******************************************************************** -->
	<!-- Setup each persistence unit -->
	<!-- ******************************************************************** -->
	<!-- Using Hibernate Persistence Units -->

	<!-- Configure a JPA vendor adapter -->
	<bean id="hibernateJpaVendorAdapter"
		class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
		<property name="showSql" value="${connection.show_sql}" />
		<property name="generateDdl" value="${connection.generateDdl}" />
		<property name="databasePlatform" value="${connection.dialect}" />
	</bean>

	<!-- EntityManager Factory that brings together the persistence unit, datasource, 
		and JPA Vendor -->
	<bean id="entityManagerFactory"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter" />
	</bean>

</beans>

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<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="entityManagerFactory" transaction-type="RESOURCE_LOCAL" >
		<description>generated-persistence-unit</description>
		<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
    		<class>com.example.Class1</class>
     		<class>com.example.Class2</class>
	</persistence-unit>

</persistence>