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/*-
* ============LICENSE_START=======================================================
* OPENECOMP - MSO
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.mso.db;
import org.hibernate.cfg.Configuration;
import org.hibernate.SessionFactory;
import org.hibernate.service.ServiceRegistry;
import org.openecomp.mso.properties.MsoDatabaseException;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import java.net.URL;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public abstract class AbstractSessionFactoryManager {
protected static Map<String, SessionFactory> sessionFactories = new ConcurrentHashMap<String, SessionFactory>();
protected synchronized SessionFactory initializeSessionFactory(URL hibernateConfigFile)
throws MsoDatabaseException {
try {
if (hibernateConfigFile != null) {
SessionFactory tempFactory = sessionFactories.get(hibernateConfigFile.getPath());
// Already initialized, skip
if (tempFactory != null) {
return tempFactory;
}
Configuration conf = new Configuration().configure(hibernateConfigFile);
ServiceRegistry sr = new StandardServiceRegistryBuilder().applySettings(conf.getProperties()).build();
tempFactory = conf.buildSessionFactory(sr);
if (tempFactory == null) {
throw new MsoDatabaseException(
"SessionFactory can't be initialized, method buildSessionFactory returned null !");
}
sessionFactories.put(hibernateConfigFile.getPath(), tempFactory);
return tempFactory;
} else {
throw new MsoDatabaseException(
"HibernateConfigFile provided is null, therefore Hibernate can't be initialized !");
}
} catch (Exception e) {
throw new MsoDatabaseException("Exception occurred during the SessionFactory Build", e);
}
}
public SessionFactory getSessionFactory() throws MsoDatabaseException {
URL hibernateConfigFile = getHibernateConfigFile();
SessionFactory factory = sessionFactories.get(hibernateConfigFile.getPath());
if (factory == null) {
factory = initializeSessionFactory(hibernateConfigFile);
}
return factory;
}
protected abstract URL getHibernateConfigFile();
}
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