/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.batchindexing.impl;
import javax.transaction.SystemException;
import org.hibernate.Session;
import org.hibernate.StatelessSession;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;
/**
* Wraps the execution of a {@code Runnable} in a JTA Transaction if necessary:
* <ul>
* <li>if the existing Hibernate Core transaction strategy requires a TransactionManager</li>
* <li>if no JTA transaction is already started</li>
* </ul>
*
* Unfortunately at this time we need to have access to {@code SessionFactoryImplementor}.
*
* @author Emmanuel Bernard
*/
public class OptionallyWrapInJTATransaction extends ErrorHandledRunnable {
private static final Log log = LoggerFactory.make();
private final SessionAwareRunnable sessionAwareRunnable;
private final StatelessSessionAwareRunnable statelessSessionAwareRunnable;
private final BatchTransactionalContext batchContext;
private final boolean wrapInTransaction;
public OptionallyWrapInJTATransaction(BatchTransactionalContext batchContext, SessionAwareRunnable sessionAwareRunnable) {
super( batchContext.searchFactoryImplementor );
/*
* Unfortunately we need to access SessionFactoryImplementor to detect:
* - whether or not we need to start the JTA transaction
* - start it
*/
this.batchContext = batchContext;
this.sessionAwareRunnable = sessionAwareRunnable;
this.statelessSessionAwareRunnable = null;
this.wrapInTransaction = batchContext.wrapInTransaction();
}
public OptionallyWrapInJTATransaction(BatchTransactionalContext batchContext, StatelessSessionAwareRunnable statelessSessionAwareRunnable) {
super( batchContext.searchFactoryImplementor );
/*
* Unfortunately we need to access SessionFactoryImplementor to detect:
* - whether or not we need to start the JTA transaction
* - start it
*/
this.batchContext = batchContext;
this.sessionAwareRunnable = null;
this.statelessSessionAwareRunnable = statelessSessionAwareRunnable;
this.wrapInTransaction = batchContext.wrapInTransaction();
}
@Override
public void runWithErrorHandler() throws Exception {
if ( wrapInTransaction ) {
final Session session;
final StatelessSession statelessSession;
if ( sessionAwareRunnable != null ) {
session = batchContext.factory.openSession();
statelessSession = null;
}
else {
session = null;
statelessSession = batchContext.factory.openStatelessSession();
}
batchContext.transactionManager.begin();
if ( sessionAwareRunnable != null ) {
sessionAwareRunnable.run( session );
}
else {
statelessSessionAwareRunnable.run( statelessSession );
}
batchContext.transactionManager.commit();
if ( sessionAwareRunnable != null ) {
session.close();
}
else {
statelessSession.close();
}
}
else {
if ( sessionAwareRunnable != null ) {
sessionAwareRunnable.run( null );
}
else {
statelessSessionAwareRunnable.run( null );
}
}
}
@Override
protected void cleanUpOnError() {
if ( wrapInTransaction ) {
try {
batchContext.transactionManager.rollback();
}
catch (SystemException e) {
log.errorRollingBackTransaction( e.getMessage(), e );
}
}
}
}