diff options
Diffstat (limited to 'common/src/main/java/org/openecomp/mso/db/AbstractSessionFactoryManager.java')
-rw-r--r-- | common/src/main/java/org/openecomp/mso/db/AbstractSessionFactoryManager.java | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/common/src/main/java/org/openecomp/mso/db/AbstractSessionFactoryManager.java b/common/src/main/java/org/openecomp/mso/db/AbstractSessionFactoryManager.java new file mode 100644 index 0000000000..3efd6e2435 --- /dev/null +++ b/common/src/main/java/org/openecomp/mso/db/AbstractSessionFactoryManager.java @@ -0,0 +1,74 @@ +/*- + * ============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(); +} |