| /* |
| * 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.Query; |
| import org.hibernate.cache.spi.QueryResultsRegion; |
| |
| /** |
| * Implementation of {@link QueryResultsRegion}. This region is used to store query results. |
| * <p> |
| * Query results caching 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> |
| * |
| * <!-- Enable query 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> |
| * By default queries are not cached even after enabling query caching, to enable results caching for a particular |
| * query, call {@link Query#setCacheable(boolean)}: |
| * <pre name="code" class="java"> |
| * Session ses = getSession(); |
| * |
| * Query qry = ses.createQuery("..."); |
| * |
| * qry.setCacheable(true); // Enable L2 cache for query. |
| * </pre> |
| * Note: the query cache does not cache the state of the actual entities in the cache, it caches only identifier |
| * values. For this reason, the query cache should always be used in conjunction with |
| * the second-level cache for those entities expected to be cached as part of a query result cache |
| */ |
| public class HibernateQueryResultsRegion extends HibernateGeneralDataRegion implements QueryResultsRegion { |
| /** |
| * @param factory Region factory. |
| * @param name Region name. |
| * @param ignite Grid. |
| * @param cache Region cache. |
| */ |
| public HibernateQueryResultsRegion(HibernateRegionFactory factory, String name, |
| Ignite ignite, HibernateCacheProxy cache) { |
| super(factory, name, ignite, cache); |
| } |
| } |