Enabling Hibernate second-level cache with JPA on JBoss 4.2
- by Peter Hilton
What are the steps required to enable Hibernate's second-level cache, when using the Java Persistence API (annotated entities)? How do I check that it's working? I'm using JBoss 4.2.2.GA.
From the Hibernate documentation, it seems that I need to enable the cache and specify a cache provider in persistence.xml, like:
<property name="hibernate.cache.use_second_level_cache"
value="true" />
<property name="hibernate.cache.provider_class"
value="org.hibernate.cache.HashtableCacheProvider" />
What else is required? Do I need to add @Cache annotations to my JPA entities?
How can I tell if the cache is working? I have tried accessing cache statistics after running a Query, but Statistics.getSecondLevelCacheStatistics returns null, perhaps because I don't know what 'region' name to use.
