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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021-2022 Nordix Foundation
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.cps.spi.utils;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionException;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.onap.cps.spi.entities.AnchorEntity;
import org.onap.cps.spi.entities.DataspaceEntity;
import org.onap.cps.spi.entities.SchemaSetEntity;
import org.onap.cps.spi.entities.YangResourceEntity;
import org.springframework.stereotype.Component;
@Component
public class SessionManager {
private static SessionFactory sessionFactory;
private static Map<String, Session> sessionMap = new HashMap<>();
private synchronized void buildSessionFactory() {
if (sessionFactory == null) {
sessionFactory = new Configuration().configure("hibernate.cfg.xml")
.addAnnotatedClass(AnchorEntity.class)
.addAnnotatedClass(DataspaceEntity.class)
.addAnnotatedClass(SchemaSetEntity.class)
.addAnnotatedClass(YangResourceEntity.class)
.buildSessionFactory();
}
}
/**
* Starts a session which allows use of locks and batch interaction with the persistence service.
*
* @return Session ID string
*/
public String startSession() {
buildSessionFactory();
final Session session = sessionFactory.openSession();
final String sessionId = UUID.randomUUID().toString();
sessionMap.put(sessionId, session);
session.beginTransaction();
return sessionId;
}
/**
* Close session.
*
* @param sessionId session ID
*/
public void closeSession(final String sessionId) {
try {
final Session currentSession = sessionMap.get(sessionId);
currentSession.getTransaction().commit();
currentSession.close();
} catch (final NullPointerException e) {
throw new SessionException(String.format("Session with session ID %s does not exist", sessionId));
} catch (final HibernateException e) {
throw new SessionException(String.format("Unable to close session with session ID %s", sessionId));
}
sessionMap.remove(sessionId);
}
}
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