applicationContext.xml

<bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">
    <property name="transactionManager">
        <ref bean="transactionManager" />
    </property>
    <property name="transactionAttributeSource">
        <value>com.MyService.*=PROPAGATION_REQUIRED</value>
    </property>
</bean>

<bean id="hibernateInterceptor" class="org.springframework.orm.hibernate3.HibernateInterceptor">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>