/*
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 16, 2009
*/
package com.bigdata.service.ndx.pipeline;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class AbstractSubtaskStats {
/**
* The #of elements in the output chunks (not including any eliminated
* duplicates).
* <p>
* Note: The {@link AtomicLong} provides an atomic update guarantee which
* some of the unit tests rely on.
*/
public final AtomicLong elementsOut = new AtomicLong(0);
/**
* The #of chunks written onto the index partition using RMI.
* <p>
* Note: The {@link AtomicLong} provides an atomic update guarantee which
* some of the unit tests rely on.
*/
public final AtomicLong chunksOut = new AtomicLong();
/**
* Elapsed time waiting for another chunk to be ready so that it can be
* written onto the index partition.
*/
public long elapsedChunkWaitingNanos = 0L;
/**
* Elapsed nanoseconds writing chunks on an index partition (RMI request).
*/
public long elapsedChunkWritingNanos = 0L;
/**
* The average #of nanoseconds for a chunk to become ready so that it can be
* written on the sink (this is an average of the totals to date, not a
* moving average).
*/
public double getAverageNanosPerWait() {
final long chunksOut = this.chunksOut.get();
return (chunksOut == 0L ? 0 : elapsedChunkWaitingNanos
/ (double) chunksOut);
}
/**
* The average #of nanoseconds per chunk written on the sink (this is an
* average of the totals to date, not a moving average).
*/
public double getAverageNanosPerWrite() {
final long chunksOut = this.chunksOut.get();
return (chunksOut == 0L ? 0 : elapsedChunkWritingNanos
/ (double) chunksOut);
}
/**
* The average #of elements (tuples) per chunk written on the sink (this is
* an average of the totals to date, not a moving average).
*/
public double getAverageElementsPerWrite() {
final long chunksOut = this.chunksOut.get();
final long elementsOut = this.elementsOut.get();
return (chunksOut == 0L ? 0 : elementsOut / (double) chunksOut);
}
public AbstractSubtaskStats() {
}
public String toString() {
return getClass().getName() + "{chunksOut=" + chunksOut
+ ", elementsOut=" + elementsOut
+ ", elapsedChunkWaitingNanos=" + elapsedChunkWaitingNanos
+ ", elapsedChunkWritingNanos=" + elapsedChunkWritingNanos
+ ", averageNanosPerWait=" + getAverageNanosPerWait()
+ ", averageNanosPerWrite=" + getAverageNanosPerWrite()
+ ", averageElementsPerWrite=" + getAverageElementsPerWrite()
+ "}";
}
}