/*************************************************************************
* Copyright 2009-2013 Eucalyptus Systems, Inc.
*
* This program 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; version 3 of the License.
*
* 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 General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
************************************************************************/
package com.eucalyptus.cloudwatch.common.internal.domain.metricdata;
import java.util.Date;
public class MetricUtils {
public static Double average(Double sum, Double size) {
if (Math.abs(size) < 0.0001) return 0.0; // TODO: make sure size is really an int
return sum/size;
}
public static Date stripSeconds(Date timestamp) {
if (timestamp == null)
return timestamp;
long time = timestamp.getTime();
time = time - time % 60000L;
return new Date(time);
}
public static Date getPeriodStart(Date originalTimestamp, Date startTime, Integer period) {
long difference = originalTimestamp.getTime() - startTime.getTime();
long remainderInOnePeriod = difference % (1000L * period);
return new Date(originalTimestamp.getTime() - remainderInOnePeriod);
}
}