/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.cache.hibernate;
import org.apache.ignite.Ignite;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.spi.CacheDataDescription;
import org.hibernate.cache.spi.EntityRegion;
import org.hibernate.cache.spi.access.AccessType;
import org.hibernate.cache.spi.access.EntityRegionAccessStrategy;
import org.hibernate.cache.spi.access.SoftLock;
/**
* Implementation of {@link EntityRegion}. This region is used to store entity data.
* <p>
* L2 cache for entity can be enabled in the Hibernate configuration file:
* <pre name="code" class="xml">
* <hibernate-configuration>
* <!-- Enable L2 cache. -->
* <property name="cache.use_second_level_cache">true</property>
*
* <!-- Use Ignite as L2 cache provider. -->
* <property name="cache.region.factory_class">org.apache.ignite.cache.hibernate.HibernateRegionFactory</property>
*
* <!-- Specify entity. -->
* <mapping class="com.example.Entity"/>
*
* <!-- Enable L2 cache with nonstrict-read-write access strategy for entity. -->
* <class-cache class="com.example.Entity" usage="nonstrict-read-write"/>
* </hibernate-configuration>
* </pre>
* Also cache for entity can be enabled using annotations:
* <pre name="code" class="java">
* @javax.persistence.Entity
* @javax.persistence.Cacheable
* @org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
* public class Entity { ... }
* </pre>
*/
public class HibernateEntityRegion extends HibernateTransactionalDataRegion implements EntityRegion {
/**
* @param factory Region factory.
* @param name Region name.
* @param ignite Grid.
* @param cache Region cache,
* @param dataDesc Region data description.
*/
HibernateEntityRegion(HibernateRegionFactory factory, String name, Ignite ignite,
HibernateCacheProxy cache, CacheDataDescription dataDesc) {
super(factory, name, ignite, cache, dataDesc);
}
/** {@inheritDoc} */
@Override public EntityRegionAccessStrategy buildAccessStrategy(AccessType accessType) throws CacheException {
return new AccessStrategy(createAccessStrategy(accessType));
}
/**
* Entity region access strategy.
*/
private class AccessStrategy extends HibernateAbstractRegionAccessStrategy
implements EntityRegionAccessStrategy {
/**
* @param stgy Access strategy implementation.
*/
private AccessStrategy(HibernateAccessStrategyAdapter stgy) {
super(stgy);
}
/** {@inheritDoc} */
@Override public EntityRegion getRegion() {
return HibernateEntityRegion.this;
}
/** {@inheritDoc} */
@Override public boolean insert(Object key, Object val, Object ver) throws CacheException {
return stgy.insert(key, val);
}
/** {@inheritDoc} */
@Override public boolean afterInsert(Object key, Object val, Object ver) throws CacheException {
return stgy.afterInsert(key, val);
}
/** {@inheritDoc} */
@Override public boolean update(Object key, Object val, Object currVer, Object previousVer)
throws CacheException {
return stgy.update(key, val);
}
/** {@inheritDoc} */
@Override public boolean afterUpdate(Object key, Object val, Object currVer, Object previousVer, SoftLock lock)
throws CacheException {
return stgy.afterUpdate(key, val);
}
}
}