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/*
* This file is part of rasdaman community.
*
* Rasdaman community 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.
*
* Rasdaman community 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 rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
package petascope.wcst.transaction;
/** Firewall class for WCS-T. It's job is to detect malitious queries and reject them.
* Currently, it only checks that queries do not occur too often.
*
* @author Andrei Aiordachioaie
*/
public class ServiceFirewall {
private static long lastQueryTime = 0;
/* Queries should not occur more often than this period (in seconds) */
private static final double MIN_QUERY_PERIOD = 10;
/** Do we reject a certain query through the firewall?
*
* @param query Query string
* @return boolean
*/
public static boolean reject(String query) {
boolean result = true;
/* Check query period */
long currentTime = System.currentTimeMillis();
if (((currentTime - lastQueryTime) / 1000) >= MIN_QUERY_PERIOD) {
result = false;
}
lastQueryTime = currentTime;
return result;
}
}
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