// Chromis POS - The New Face of Open Source POS
// Copyright (c) (c) 2015-2016
// http://www.chromis.co.uk
//
// This file is part of Chromis POS
//
// Chromis POS is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Chromis POS 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Chromis POS. If not, see <http://www.gnu.org/licenses/>.
package uk.chromis.data.loader;
import java.sql.SQLException;
import uk.chromis.basic.BasicException;
/**
*
* @author adrianromero
* Created on 26 de febrero de 2007, 21:50
* @param <T>
*
*/
public abstract class Transaction<T> {
private Session s;
/** Creates a new instance of Transaction
* @param s */
public Transaction(Session s) {
this.s = s;
}
/**
*
* @return
* @throws BasicException
*/
public final T execute() throws BasicException {
if (s.isTransaction()) {
return transact();
} else {
try {
try {
s.begin();
T result = transact();
s.commit();
return result;
} catch (BasicException e) {
s.rollback();
throw e;
}
} catch (SQLException eSQL) {
throw new BasicException("Transaction error", eSQL);
}
}
}
/**
*
* @return
* @throws BasicException
*/
protected abstract T transact() throws BasicException;
}