/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.hibernate.instance;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.hibernate.AbstractHazelcastCacheRegionFactory;
import com.hazelcast.logging.ILogger;
import com.hazelcast.logging.Logger;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cache.RegionFactory;
import org.hibernate.cfg.Settings;
import org.hibernate.engine.SessionFactoryImplementor;
import java.util.logging.Level;
/**
* Access underlying HazelcastInstance using Hibernate SessionFactory
*/
public final class HazelcastAccessor {
private HazelcastAccessor(){}
static final ILogger logger = Logger.getLogger(HazelcastAccessor.class);
/**
* Tries to extract <code>HazelcastInstance</code> from <code>Session</code>.
*
* @param session
* @return Currently used <code>HazelcastInstance</code> or null if an error occurs.
*/
public static HazelcastInstance getHazelcastInstance(final Session session) {
return getHazelcastInstance(session.getSessionFactory());
}
/**
* Tries to extract <code>HazelcastInstance</code> from <code>SessionFactory</code>.
*
* @param sessionFactory
* @return Currently used <code>HazelcastInstance</code> or null if an error occurs.
*/
public static HazelcastInstance getHazelcastInstance(final SessionFactory sessionFactory) {
if (!(sessionFactory instanceof SessionFactoryImplementor)) {
logger.warning("SessionFactory is expected to be instance of SessionFactoryImplementor.");
return null;
}
return getHazelcastInstance((SessionFactoryImplementor) sessionFactory);
}
/**
* Tries to extract <code>HazelcastInstance</code> from <code>SessionFactoryImplementor</code>.
*
* @param sessionFactory
* @return currently used <code>HazelcastInstance</code> or null if an error occurs.
*/
public static HazelcastInstance getHazelcastInstance(final SessionFactoryImplementor sessionFactory) {
final Settings settings = sessionFactory.getSettings();
final RegionFactory rf = settings.getRegionFactory();
if (rf == null) {
logger.severe("Hibernate 2nd level cache has not been enabled!");
return null;
}
if (rf instanceof AbstractHazelcastCacheRegionFactory) {
return ((AbstractHazelcastCacheRegionFactory) rf).getHazelcastInstance();
} else {
logger.warning("Current 2nd level cache implementation is not HazelcastCacheRegionFactory!");
}
return null;
}
}