Spring 3.1, Hibernate 4 and Jboss 7 configuration

Spring3_Hibernate4_Configiration.xml

<!--Transactions are managed by Spring. I am not sure which transaction factory should be used for 'hibernate.transaction.factory_class'. I 
feel it should be org.hibernate.engine.transaction.internal.jta.JtaTransactionFactory because we get BMT with Spring. Check 
https://hibernate.onjira.com/browse/HHH-7215. So far I have not seen any side effects of this configuration probably because Jboss TS 
transaction related data is thread bound and both UserTransaction and TransactionManager implementations will have reference to transaction 
instance with same state.Please comment if you see any side effects of this configuration-->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
  <property name="dataSource"><ref bean="dataSource" /></property>
    <property name="hibernateProperties">
      <value>
	hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
	hibernate.bytecode.use_reflection_optimizer=true
	hibernate.cache.use_second_level_cache=true
	hibernate.cache.use_query_cache=true
	hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactory
	hibernate.transaction.jta.platform=org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform
	hibernate.transaction.factory_class=org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory
	hibernate.hbm2ddl.auto=update
	hibernate.show_sql=false
      </value>
  </property
</bean>