When/How do I set Ehcache used by Hibernate size programmatically

问题

I have enabled 2nd level caching in Hibernate 4.3.11 by adding:

 config.setProperty("hibernate.cache.region.factory_class", "org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory");
 config.setProperty("hibernate.cache.use_second_level_cache", "true");

to my Hibernate Config.

This to my pom.xml (Not sure if necessary for pom definition to be this awkward)

<dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-ehcache</artifactId>
      <version>4.3.11.Final</version>
      <exclusions>
          <exclusion>
              <groupId>net.sf.ehcache</groupId>
              <artifactId>ehcache-core</artifactId>
          </exclusion>
      </exclusions>
      </dependency>
      <dependency>
          <groupId>net.sf.ehcache</groupId>
          <artifactId>ehcache</artifactId>
          <version>2.7.0</version>
      </dependency>

and this to the class I want to cache

@Cacheable
@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)

But how do I configure the cache size in code when the database is created, its not practical for me to use Xml file that just adds complication to the build process I would much prefer to do in code.

Update, after creating database from Hibernate, I find the Caches are already created

CacheManager.create();
String[] cacheNames = CacheManager.getInstance().getCacheNames();
for(String cacheName:cacheNames)
{
    MainWindow.logger.severe("CacheName:"+cacheName);
    Cache cache = CacheManager.getInstance().getCache(cacheName);
    cache.getCacheConfiguration().setMaxEntriesInCache(1000);
    cache.getCacheConfiguration().setLogging(true);
}

but how can I affect how they are created or does modifying values like i have done is enough to update. When I run I see no debugging outout or anything to indicate the cache is being used.

回答1:

You could subclass org.hibernate.cache.ehcache.EhCacheRegionFactory and perform any cache configuration manually, and then tell Hibernate to use your custom cache factory with:

Configuration.setProperty("hibernate.cache.region.factory_class", "my.cache.FactoryClass");

See: http://www.ehcache.org/documentation/2.7/integrations/hibernate.html#set-the-hibernate-cache-provider-programmatically-

来源：https://stackoverflow.com/questions/52823657/when-how-do-i-set-ehcache-used-by-hibernate-size-programmatically

标签

hibernate

Ehcache

hibernate-4.x