EDIT

<?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:context="http://www.springframework.org/schema/context"

  xsi:schemaLocation="http://www.springframework.org/schema/beans

    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <!-- enable processing of annotations such as @Autowired and @Configuration -->

    <context:annotation-config/>

    <bean class="eu.etaxonomy.cdm.opt.config.DataSourceConfigurer" >

    </bean>

    <bean id="jndiHibernateProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">

        <property name="properties"><!-- This configures default hibernate properties -->

            <props>

              <!--

                the hibernate.dialect will be set by the JndiDataSourceConfig according to the

                according WebAppContext attributes or to the environment variable

              -->

              <prop key="hibernate.hbm2ddl.auto">validate</prop><!-- !!! must never be set to 'update' !!! -->

              <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.internal.NoCachingRegionFactory</prop>

              <prop key="hibernate.show_sql">false</prop>

              <prop key="hibernate.format_sql">false</prop>

              <prop key="hibernate.search.default.directory_provider">org.hibernate.search.store.impl.FSDirectoryProvider</prop>

              <prop key="hibernate.search.default.indexBase">${eu.etaxonomy.cdm.search.index.path}</prop><!-- set in applicationContext.xml -->

              <!-- 

                  Using the hibernate.event.merge.entity_copy_observer is a bit risky, 

                  see https://hibernate.atlassian.net/browse/HHH-9106 and 

                  https://dev.e-taxonomy.eu/redmine/issues/6687 

              -->

              <!-- <prop key="hibernate.event.merge.entity_copy_observer">allow</prop> -->

              <!-- disabling hibernate search for testing (speed up and lesser heap usage)

              <prop key="hibernate.search.autoregister_listeners">false</prop>

              -->

            </props>

        </property>

    </bean>

</beans>