<hibernate-configuration>
 	<session-factory>
 		<property name="connection.url">jdbc:postgresql://host:5432/terracotta</property>
 		<property name="connection.username">user</property>
 		<property name="connection.password"></property>
 		<property name="connection.driver_class">org.postgresql.Driver</property>
 		<property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
 		<property name="hibernate.hbm2ddl.auto">update</property>
 		<property name="hibernate.show_sql">true</property>
 		
 
 		<property name="hibernate.cache.use_second_level_cache">true</property>
 		<property name="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</property>
 		<property name="net.sf.ehcache.configurationResourceName">/com/donkey/demo/ehcache.xml</property>
 		<property name="hibernate.generate_statistics">true</property>
 		<property name="hibernate.cache.use_query_cache">true</property>
 						
 <!-- mappings -->
 		<mapping class="com.donkey.demo.model.User"/>
 
 <!-- cache settings -->
 		<class-cache class="com.donkey.demo.model.User" usage="read-write"/>
 	</session-factory>
 </hibernate-configuration>

 <cache name="com.donkey.demo.model.User" 
 	maxElementsInMemory="50"
  	maxElementsOnDisk="100"
 	eternal="true" 
 	timeToIdleSeconds="0"
 	timeToLiveSeconds="0"
 	memoryStoreEvictionPolicy="LRU">
 
 	<cacheEventListenerFactory class="net.sf.ehcache.event.TerracottaCacheEventReplicationFactory" />
 	<cacheEventListenerFactory class="com.donkey.demo.dao.ehcache.UserHibernateCacheEventListenerFactory"/> 
 
 	<terracotta clustered="true" valueMode="serialization" />
 </cache>
 

 public void delete(T obj) throws ExceptionInInitializerError, HibernateException {
 	Session session = HibernateUtil.getInstance().getSession();
 	Transaction tx = session.beginTransaction();
 	try {
 		session.delete(obj);
 		tx.commit();
 	} catch (HibernateException e) {
 		System.err.println("HibernateException occurred while deleting an object. " + e);
 		tx.rollback();
 		throw e;
 	}
 	finally {
 		session.close();			
 	}
 		
 }
 

 abstract class AbstractEhcacheAccessStrategy<T extends EhcacheTransactionalDataRegion> {
 
 ...
 
   /**
    * A no-op since this is an asynchronous cache access strategy.
    *
    * @see org.hibernate.cache.access.EntityRegionAccessStrategy#remove(java.lang.Object)
    * @see org.hibernate.cache.access.CollectionRegionAccessStrategy#remove(java.lang.Object)
    */
   public void remove(Object key) throws CacheException {
   }
 
 ...
 
 }
 

 @Entity
 @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
 public class Entity1 {
 
 	@Id
 	@GeneratedValue
 	private Long id;
 
 	@Column(length = 100)
 	private String name;
 
 	@Version
 	private long versioncontrol;
 
 	public Long getId() {
 		return id;
 	}
 
 	public void setId(Long id) {
 		this.id = id;
 	}
 
 	public String getName() {
 		return name;
 	}
 
 	public void setName(String name) {
 		this.name = name;
 	}
 
 	public long getVersioncontrol() {
 		return versioncontrol;
 	}
 
 	public void setVersioncontrol(long versioncontrol) {
 		this.versioncontrol = versioncontrol;
 	}
 
 	@Override
 	public int hashCode() {
 		final int prime = 31;
 		int result = 1;
 		result = prime * result + ((id == null) ? 0 : id.hashCode());
 		return result;
 	}
 
 	@Override
 	public boolean equals(Object obj) {
 		if (this == obj)
 			return true;
 		if (obj == null)
 			return false;
 		if (getClass() != obj.getClass())
 			return false;
 		Entity1 other = (Entity1) obj;
 		if (id == null) {
 			if (other.id != null)
 				return false;
 		} else if (!id.equals(other.id))
 			return false;
 		return true;
 	}
 
 	@Override
 	public String toString() {
 		return "Entity1: " + id + ":" + name + ":" + versioncontrol;
 	}
 }