/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) 1999-2006 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <p>
*/
package org.olat.core.commons.persistence;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.olat.core.logging.AssertException;
import org.olat.core.logging.DBRuntimeException;
import org.olat.testutils.codepoints.server.Codepoint;
/**
* Description:<br>
*
* @author Felix Jost
*/
class DBSession {
private Session hibernateSession;
private DBTransaction trxWrapper = null;
protected DBSession(Session hibernateSession) {
this.hibernateSession = hibernateSession;
}
/**
* OLAT-3652: allow clearing of transaction - needed to avoid side-effects of subsequent session usage with error-in-transaction
*/
protected void clearTransaction() {
if ( (hibernateSession != null) && hibernateSession.isOpen()) {
throw new DBRuntimeException("clearTransaction expected session to be closed at this point!");
}
trxWrapper = null;
}
protected DBTransaction beginDbTransaction() {
if (trxWrapper == null || trxWrapper.isCommitted()) {
try {
Transaction trx = hibernateSession.beginTransaction();
trxWrapper = new DBTransaction(trx);
return trxWrapper;
} catch (HibernateException e) {
throw new DBRuntimeException("DBSession - could not begin DBTransaction", e);
}
} else {
throw new DBRuntimeException(
"Nested transactions are not allowed! "
+ "Don't use atomar hibernate calls but the equvalent version that requires your current transaction object."
);
}
}
/**
* @return Session
*/
protected Session getHibernateSession() {
return hibernateSession;
}
/**
* Close the Hibernate Session an clean up connection.
*/
protected void close() {
try {
if ( (hibernateSession != null) && hibernateSession.isOpen()) {
Codepoint.codepoint(DBImpl.class, "closeSession");
if ( (getTransaction() != null) && getTransaction().isInTransaction()
&& !getTransaction().isRolledBack()) {
throw new AssertException("Try to close un-committed session");
}
hibernateSession.close();
}
} catch (HibernateException e) {
throw new DBRuntimeException("Close Session error.", e);
} catch (Exception e) {
throw new DBRuntimeException("Error in dbsession.close: ", e);
} finally {
try {
if (hibernateSession != null) {
if (hibernateSession.isOpen()) hibernateSession.close();
}
} catch (Exception e) {
// we did our best to close the hibernate session
throw new DBRuntimeException("in finally of DBSession.java / closeSession(), closesession failed again ", e);
}
}
}
boolean contains(Object object) {
return this.hibernateSession.contains(object);
}
/**
* @return the current transaction or null.
*/
protected DBTransaction getTransaction() {
return trxWrapper;
}
/**
* @return true if session is open
*/
boolean isOpen() {
return hibernateSession.isOpen();
}
}