Spring使用Hibernate二级缓存 [英] Hibernate second level cache with Spring

问题描述

我使用Spring + JPA + Hibernate。我试图启用Hibernate的二级缓存。在我的Spring的 applicationContext.xml 中，我有：

 < prop key = 在hibernate.cache.provider_class > net.sf.ehcache.hibernate.SingletonEhCacheProvider< /丙> 
< prop key =hibernate.cache.provider_configuration_file_resource_path> /ehcache.xml< / prop> 
  

当我运行时出现错误：

 原因：org.hibernate.HibernateException：无法在org.hibernate.cache.CacheFactory.createCache（CacheFactory.java:64）
中实例化缓存实现
 
导致：org.hibernate.cache.NoCachingEnabledException：二级缓存未启用[hibernate.cache.use_second_level_cache | hibernate.cache.use_query_cache] 
在org.hibernate.cache.NoCacheProvider.buildCache（NoCacheProvider.java:21）
  

所以这是抱怨我没有启用二级缓存。我试图通过添加到我的 applicationContext.xml 来启用它：

  < prop key =hibernate.cache.use_second_level_cache> true< / prop> 
  

但是仍然没有快乐。我也尝试将其添加到我的ehcache.xml中：

 < property name =hibernate.cache.use_second_level_cache> true< ; /性> 
  

但它仍然无效。将 provider_class 更改为 org.hibernate.cache.EhCacheProvider 也无济于事：

 < prop key =hibernate.cache.provider_class> org.hibernate.cache.EhCacheProvider< / prop> 
  

我的实体类被注释为使用缓存

  @Cache（usage = CacheConcurrencyStrategy.READ_ONLY）
  

，如何启用二级缓存？

编辑：这是在bean下面：

 < bean id =entityManagerFactoryclass =org.springframework.orm.jpa.LocalEntityManagerFactoryBean> 
  

已解决：由于我使用 LocalEntityManagerFactoryBean 它从 META-INF / persistence.xml 获取它的设置。我在 applicationContext.xml 中的设置甚至没有被读取。

解决方案

我没有回答这个问题，但海报自己找到答案并不明显。我重新发布他的答案：

已解决

由于我使用 LocalEntityManagerFactoryBean 它从 META-INF / persistence.xml 获取它的设置。我在 applicationContext.xml 中的设置甚至没有被读取。

I'm using Spring + JPA + Hibernate. I'm trying to enable Hibernate's second level cache. In my Spring's applicationContext.xml I have:

<prop key="hibernate.cache.provider_class">net.sf.ehcache.hibernate.SingletonEhCacheProvider</prop>
<prop key="hibernate.cache.provider_configuration_file_resource_path">/ehcache.xml</prop>

When I run I get the error:

Caused by: org.hibernate.HibernateException: Could not instantiate cache implementation
     at org.hibernate.cache.CacheFactory.createCache(CacheFactory.java:64)

Caused by: org.hibernate.cache.NoCachingEnabledException: Second-level cache is not enabled for usage [hibernate.cache.use_second_level_cache | hibernate.cache.use_query_cache]
     at org.hibernate.cache.NoCacheProvider.buildCache(NoCacheProvider.java:21) 

So it's complain I don't have second level cache enabled. I attempt to enable it by adding to my applicationContext.xml:

<prop key="hibernate.cache.use_second_level_cache">true</prop>

But still no joy. I also tried adding this to my ehcache.xml:

<property name="hibernate.cache.use_second_level_cache">true</property>

But it still doesn't work. Changing the provider_class to org.hibernate.cache.EhCacheProvider doesn't help either:

<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>

My entity classes are annotated to use caching

@Cache(usage=CacheConcurrencyStrategy.READ_ONLY)

So, how do I enable second level cache?

Edit: This is under the bean:

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">

Resolved: Since I'm using LocalEntityManagerFactoryBean it gets its settings from META-INF/persistence.xml. My settings in applicationContext.xml weren't even being read.

解决方案

I didn't answer this, but it's not obvious that the poster found the answer himself. I'm reposting his answer:

Resolved

Since I'm using LocalEntityManagerFactoryBean it gets its settings from META-INF/persistence.xml. My settings in applicationContext.xml weren't even being read.

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