Question

我正在尝试将Ehcache（2.6.0）配置为Hibernate（3.6.4）二级缓存。我在spring上下文文件中设置了以下属性

<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.SingletonEhCacheRegionFactory</prop>

当我启动应用程序时，它失败并出现例外：java.lang.ClassCastException: net.sf.ehcache.hibernate.SingletonEhCacheRegionFactory cannot be cast to org.hibernate.cache.RegionFactory

这是stacktrace：

Caused by: org.hibernate.HibernateException: could not instantiate RegionFactory [net.sf.ehcache.hibernate.SingletonEhCacheRegionFactory]
    at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:423)
    at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:280)
    at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2863)
    at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2859)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1870)
    Caused by: java.lang.ClassCastException: net.sf.ehcache.hibernate.SingletonEhCacheRegionFactory cannot be cast to org.hibernate.cache.RegionFactory
    at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:409)

我查看了来源并观察了SingletonEhCacheRegionFactory extends AbstractEhcacheRegionFactory和AbstractEhcacheRegionFactory implements RegionFactory

SettingsFactory.java:409上的代码是

            return (RegionFactory) ReflectHelper.classForName( regionFactoryClassName )
                    .getConstructor( Properties.class )
                    .newInstance( properties );

似乎一切都已到位，但我仍然得到例外。有线索吗？

Answer 1

您可以尝试提供提供商类：

org.hibernate.cache.EhCacheProvider

并确保为ehCache添加了所需的jar。

java.lang.ClassCastException：net.sf.ehcache.hibernate.SingletonEhCacheRegionFactory无法强制转换为org.hibernate.cache.RegionFactory

1 个答案: