nl.tudelft.stocktrader.derby.AbstractDerbyDAO.java Source code

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Here is the source code for nl.tudelft.stocktrader.derby.AbstractDerbyDAO.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

package nl.tudelft.stocktrader.derby;

import java.sql.Connection;
import java.sql.SQLException;

import nl.tudelft.stocktrader.dal.DAOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class AbstractDerbyDAO {

    private static final Log logger = LogFactory.getLog(AbstractDerbyDAO.class);

    protected Connection sqlConnection;

    private int previousTransactionIsolation;

    public AbstractDerbyDAO(Connection sqlConnection) throws DAOException {
        this.sqlConnection = sqlConnection;
    }

    public void beginTransaction() throws DAOException {
        logger.debug("AbstractMSSQLDAO.beginTransaction()");
        try {
            sqlConnection.setAutoCommit(false);
            previousTransactionIsolation = sqlConnection.getTransactionIsolation();
            sqlConnection.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
        } catch (SQLException e) {
            e.printStackTrace();
            logger.debug("", e);
            throw new DAOException("Exception was thrown during the start of transaction", e);
        }
    }

    public void commitTransaction() throws DAOException {
        logger.debug("AbstractMSSQLDAO.commitTransaction()");
        try {
            sqlConnection.commit();
            sqlConnection.setAutoCommit(true);
            sqlConnection.setTransactionIsolation(previousTransactionIsolation);
        } catch (SQLException e) {
            throw new DAOException("Exception is thrown during the commit of transaction", e);
        }
    }

    public void rollbackTransaction() throws DAOException {
        logger.debug("AbstractMySQLDAO.rollbackTransaction()");
        try {
            sqlConnection.rollback();
            sqlConnection.setAutoCommit(true);
            sqlConnection.setTransactionIsolation(previousTransactionIsolation);
        } catch (SQLException e) {
            throw new DAOException("Exception is thrown during the rollback of transaction", e);

        }
    }

    public void close() throws DAOException {
        try {
            sqlConnection.close();
        } catch (SQLException e) {
            throw new DAOException("", e);
        }
    }
}