org.hibernate.engine.TransactionHelper Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.engine;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.SQLException;
import org.hibernate.HibernateException;
import org.hibernate.engine.transaction.IsolatedWork;
import org.hibernate.engine.transaction.Isolater;
import org.hibernate.exception.JDBCExceptionHelper;
/**
* Allows work to be done outside the current transaction, by suspending it,
* and performing work in a new transaction
*
* @author Emmanuel Bernard
*/
public abstract class TransactionHelper {
// todo : remove this and just have subclasses use Isolater/IsolatedWork directly...
/**
* The work to be done
*/
protected abstract Serializable doWorkInCurrentTransaction(Connection conn, String sql) throws SQLException;
/**
* Suspend the current transaction and perform work in a new transaction
*/
public Serializable doWorkInNewTransaction(final SessionImplementor session)
throws HibernateException {
class Work implements IsolatedWork {
Serializable generatedValue;
public void doWork(Connection connection) throws HibernateException {
String sql = null;
try {
generatedValue = doWorkInCurrentTransaction( connection, sql );
}
catch( SQLException sqle ) {
throw JDBCExceptionHelper.convert(
session.getFactory().getSQLExceptionConverter(),
sqle,
"could not get or update next value",
sql
);
}
}
}
Work work = new Work();
Isolater.doIsolatedWork( work, session );
return work.generatedValue;
}
}