rrdrestorecmd.java

jrobin,使用纯java实现的RRD数据库,使用RRD数据库来统计数据.

/* ============================================================
 * JRobin : Pure java implementation of RRDTool's functionality
 * ============================================================
 *
 * Project Info:  http://www.jrobin.org
 * Project Lead:  Sasa Markovic ([e-mail]);
 *
 * (C) Copyright 2003-2005, by Sasa Markovic.
 *
 * Developers:    Sasa Markovic ([e-mail])
 *
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 */
package org.jrobin.cmd;

import org.jrobin.core.Datasource;
import org.jrobin.core.RrdDb;
import org.jrobin.core.RrdException;

import java.io.IOException;

class RrdRestoreCmd extends RrdToolCmd {
	String getCmdType() {
		return "restore";
	}

	Object execute() throws RrdException, IOException {
		boolean check = getBooleanOption("r", "range-check");
		String[] words = getRemainingWords();
		if (words.length != 3) {
			throw new RrdException("Invalid rrdrestore syntax");
		}
		String xmlPath = words[1];
		String rrdPath = words[2];
		RrdDb rrdDb = getRrdDbReference(rrdPath, xmlPath);
		try {
			if (check) {
				int dsCount = rrdDb.getHeader().getDsCount();
				for (int i = 0; i < dsCount; i++) {
					Datasource ds = rrdDb.getDatasource(i);
					double minValue = ds.getMinValue();
					double maxValue = ds.getMaxValue();
					// this will perform range check
					ds.setMinMaxValue(minValue, maxValue, true);
				}
			}
			return rrdPath;
		}
		finally {
			releaseRrdDbReference(rrdDb);
		}
	}
}