在Hibernate 4 + Spring 4 + JTA中查找使用HQL或会话过滤器查询的对象的问题

Question

We recently migrated from Hibernate 3.2.3, Spring 3.2.2 to Hibernate 4.3.11 and Spring 4.2.1 on Weblogic 10.3

Now in a transaction when hibernate objects are created and added to a hibernate object's persistent collection and later queried with HQL(using hibernateTemplate) or Hibernate's "Query" feature (in the same transaction and before the end of the transaction), Hibernate fails to find the objects that were added. This worked with Hibernate 3 and Spring 3 before the upgrade, but now fails.

eg In Psuedo code, say i have a library class with the following property.

class Library{
   private Collection<Books> books;
}

In a transaction, i do the following -

...
Book book1 = new Book();
book1.setAuthor("Patrick Holt");
library.getBooks().add(book1);

and later on in the same transaction, Hibernate's "Query" is used with a Filter to look for books by the author, like so

Session s = hibernateTemplate.getSessionFactory().getCurrentSession();
Query q = s.createFilter(library.getBooks(), "where this.author =  :authorName");
q.setParameter("authorName", "Patrick Holt");
List l = q.list();

q.list() in the above example returns 0 results. This would return 1 result before the upgrade. After the upgrade i get 0 results.

I read about some changes in the currentSessionContext in upgrades to Hibernate 4 and Spring 4, but I'm not sure what needs to change in order for the behavior to be just like before the upgrade, without the code having to change.

Out hibernate objects are defined in hbm.xml files and here's my configuration of the session factory.

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
                <prop key="hibernate.show_sql">false</prop>
                <prop key="hibernate.cache.use_second_level_cache">true</prop>
                <prop key="hibernate.cache.use_query_cache">true</prop>
                <prop key="hibernate.cache.provider_class">net.sf.ehcache.hibernate.EhCacheProvider</prop>
                <prop key="hibernate.cache.provider_configuration_file_resource_path">/WEB-INF/ehcache.xml</prop>
                <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory</prop>
                <!--
                Tried adding the following properties, but it didn't work either
                <prop key="hibernate.transaction.jta.platform">org.hibernate.engine.transaction.jta.platform.internal.WeblogicJtaPlatform</prop>
                <prop key="hibernate.transaction.factory_class">org.hibernate.engine.transaction.internal.jta.JtaTransactionFactory</prop>-->
            </props>
        </property>
        <property name="dataSource" ref="dataSource"/>
        <property name="mappingJarLocations">
            <list>
                <value>/WEB-INF/lib/app-1.0.jar</value>
            </list>
        </property>
     </bean>

Transaction Manager definition:

<bean id="transactionManager" class="org.springframework.transaction.jta.WebLogicJtaTransactionManager"/>

The datasource is made available over jndi.

Any ideas on what i need to do to fix this issue?

Answer 1

The issue i was having is exactly as described in Spring Jira Issue SPR-13848 . As i understand, it seems like the OpenSessionInViewFilter opens a request scoped session early and there are issues with syncing with a transaction that's started later.

I could not get rid of my OSIV because of the impact that it would cause throughout my application. However, i found out that hibernate has a property that will accomplish something similar to prevent lazy loading -

<prop key="hibernate.enable_lazy_load_no_trans">true</prop>

This solved the issue. Adding this property allowed me to remove the OSIV, and hibernate's AUTO flush mode works as expected in a transaction now. I also used the CMTTransactionFactory. All my hibernate properties:

             <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
                <prop key="hibernate.show_sql">false</prop>
                <prop key="hibernate.cache.use_second_level_cache">true</prop>
                <prop key="hibernate.cache.use_query_cache">true</prop>
                <prop key="hibernate.cache.provider_class">net.sf.ehcache.hibernate.EhCacheProvider</prop>
                <prop key="hibernate.cache.provider_configuration_file_resource_path">/WEB-INF/ehcache.xml</prop>
                <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory</prop>
                <prop key="hibernate.enable_lazy_load_no_trans">true</prop>
                <prop key="hibernate.transaction.jta.platform">org.hibernate.engine.transaction.jta.platform.internal.WeblogicJtaPlatform</prop>
                <prop key="hibernate.transaction.factory_class">org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory</prop>
            </props>