/**
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 Jan 1, 2011
*/
package com.bigdata.bop.engine;
import java.util.concurrent.Future;
import com.bigdata.relation.accesspath.IAsynchronousIterator;
import com.bigdata.relation.accesspath.IBlockingBuffer;
/**
* Delegation pattern handles the {@link SinkTransitionMetadata}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class OutputStatsBuffer<E> implements IBlockingBuffer<E> {
private final IBlockingBuffer<E> b;
private final BOpStats stats;
public OutputStatsBuffer(final IBlockingBuffer<E> b, final BOpStats stats) {
this.b = b;
this.stats = stats;
}
public IAsynchronousIterator<E> iterator() {
return b.iterator();
}
public void setFuture(final Future future) {
b.setFuture(future);
}
public void abort(final Throwable cause) {
b.abort(cause);
}
public void close() {
b.close();
}
public Future getFuture() {
return b.getFuture();
}
public boolean isOpen() {
return b.isOpen();
}
public long flush() {
return b.flush();
}
/**
* Tracks {@link BOpStats#unitsOut} and {@link BOpStats#chunksOut}.
* <p>
* Note: {@link BOpStats#chunksOut} will report the #of chunks added to this
* buffer. However, the buffer MAY combine chunks either on add() or when
* drained by the iterator so the actual #of chunks read back from the
* iterator MAY differ.
* <p>
* {@inheritDoc}
*/
public void add(final E e) {
b.add(e);
if (e.getClass().getComponentType() != null) {
stats.unitsOut.add(((Object[]) e).length);
} else {
stats.unitsOut.increment();
}
stats.chunksOut.increment();
}
public boolean isEmpty() {
return b.isEmpty();
}
public void reset() {
b.reset();
}
public int size() {
return b.size();
}
}