[hibernate-dev] Auto-registering the cacheable entities and collections

[Vlad Mihalcea]

Hi,

While upgrading my Hibernate testing repository to 5.3, I realized that we
no longer auto-register the 2nd-level cache for entities and the
collections even if those are annotated with the Hibernate @Cache
annotation.

I noticed that the Hibernate tests have been modified and we require to
register those manually:

for ( Map.Entry<Class, String> entry : getCachedClasses().entrySet() ) {
config.put( AvailableSettings.CLASS_CACHE_PREFIX + "." +
entry.getKey().getName(), entry.getValue() );
}
for ( Map.Entry<String, String> entry : getCachedCollections().entrySet() )
{
config.put( AvailableSettings.COLLECTION_CACHE_PREFIX + "." +
entry.getKey(), entry.getValue() );
}

Now, if I don't do that, I get the following exception:

Caused by: org.hibernate.cache.CacheException: On-the-fly creation of
JCache Cache objects is not supported
[com.vladmihalcea.book.hpjp.hibernate.cache.query.QueryCacheTest$Post.comments]
at
org.hibernate.cache.ehcache.internal.EhcacheRegionFactory.createCache(EhcacheRegionFactory.java:106)
at
org.hibernate.cache.ehcache.internal.EhcacheRegionFactory.getOrCreateCache(EhcacheRegionFactory.java:100)
at
org.hibernate.cache.ehcache.internal.EhcacheRegionFactory.createDomainDataStorageAccess(EhcacheRegionFactory.java:71)
at
org.hibernate.cache.spi.support.RegionFactoryTemplate.buildDomainDataRegion(RegionFactoryTemplate.java:31)
at
org.hibernate.cache.internal.EnabledCaching.prime(EnabledCaching.java:108)
at
org.hibernate.metamodel.internal.MetamodelImpl.primeSecondLevelCacheRegions(MetamodelImpl.java:284)
at
org.hibernate.metamodel.internal.MetamodelImpl.initialize(MetamodelImpl.java:116)
at
org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:295)
at
org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:467)
at
org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939)


However, I don't even use JCache. I use "ehcache" instead.

properties.put("hibernate.cache.region.factory_class", "ehcache");

Was a JCache requirement?

Can we auto-register the entities and collections for other cache providers?

I'm worried about all those applications trying to upgrade to 5.3. Imagine
if they have hundreds of entities and collections. People will surely start
complaining if we force them to do that manually during bootstrap. More,
I'm not sure how they can do when they just bootstrap via a JPA
persistence.xml configuration file.

Vlad