/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Apr 18, 2008
*/
package com.bigdata.counters;
/**
* A view of a sample period for some {@link History}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*
* @param <T>
*/
public interface IHistoryEntry<T> {
/**
* The timestamp of the last sample to fall into this period. This timestamp
* will always be GTE {@link #getStartOfSamplePeriod()} and LE
* {@link #getEndOfSamplePeriod()}.
*/
public long lastModified();
// /**
// * The earliest possible timestamp for which a sample would be reported
// * within this {@link IHistoryEntry} (inclusive lower bound).
// */
// public long getStartOfSamplePeriod();
//
// /**
// * The last possible timestamp for which a sample would be reported within
// * this {@link IHistoryEntry} (exclusive upper bound).
// */
// public long getEndOfSamplePeriod();
/**
* The average of the samples in this period.
*/
public T getValue();
/**
* The #of samples in this period.
*/
public int getCount();
/**
* The total of the samples in this period.
*/
public T getTotal();
}