Steve Kuo Steve Kuo - 2 months ago 20
Java Question

Hibernate second level cache with Spring

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.

Answer

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.