de.iteratec.iteraplan.persistence.CachableBasicDataSource.java Source code

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Here is the source code for de.iteratec.iteraplan.persistence.CachableBasicDataSource.java

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/*
 * iteraplan is an IT Governance web application developed by iteratec, GmbH
 * Copyright (C) 2004 - 2014 iteratec, GmbH
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY ITERATEC, ITERATEC DISCLAIMS THE
 * WARRANTY OF NON INFRINGEMENT  OF THIRD PARTY RIGHTS.
 *
 * 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 *
 * You can contact iteratec GmbH headquarters at Inselkammerstr. 4
 * 82008 Munich - Unterhaching, Germany, or at email address info@iteratec.de.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * "iteraplan" logo. If the display of the logo is not reasonably
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by iteraplan".
 */
package de.iteratec.iteraplan.persistence;

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

import org.apache.commons.dbcp.BasicDataSource;

/**
 * This class extends Apache's {@link BasicDataSource} to store an access identifier 
 * of type long for every attempt to get a connection from this underlying data source. 
 * That way, data sources that have not been used recently may be filtered out based on 
 * that identifier. This implementation uses the {@link System#currentTimeMillis()} 
 * method to get an increasing identifier.
 * 
 * @see RoutingDataSource
 */
public class CachableBasicDataSource extends BasicDataSource {

    private long timestamp;

    public CachableBasicDataSource() {
        super();
        timestamp = System.currentTimeMillis();
    }

    public long getTimestamp() {
        return timestamp;
    }

    public Connection getConnection() throws SQLException {
        timestamp = System.currentTimeMillis();
        return super.getConnection();
    }

}