2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.openecomp.mso.db;
23 import org.hibernate.cfg.Configuration;
24 import org.hibernate.SessionFactory;
25 import org.hibernate.service.ServiceRegistry;
26 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
29 public abstract class HibernateUtils {
31 protected SessionFactory sessionFactory;
33 protected synchronized void initializeHibernate(URL hibernateConfigFile) {
34 // Can be null, in that case, we skip the loading
35 if (hibernateConfigFile != null) {
36 // Already initialized, skip
37 if (sessionFactory != null) {
41 Configuration conf = new Configuration().configure(hibernateConfigFile);
42 ServiceRegistry sr = new StandardServiceRegistryBuilder().applySettings(conf.getProperties()).build();
43 sessionFactory = conf.buildSessionFactory(sr);
47 public SessionFactory getSessionFactory() {
48 if (sessionFactory == null) {
49 initializeHibernate(getHibernateConfigFile());
51 return sessionFactory;
54 protected abstract URL getHibernateConfigFile();