/*
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 6, 2009
*/
package com.bigdata.counters.query;
import java.util.Iterator;
import java.util.Vector;
import java.util.regex.Pattern;
import com.bigdata.counters.CounterSet;
import com.bigdata.counters.ICounter;
import com.bigdata.counters.PeriodEnum;
import com.bigdata.counters.store.CounterSetBTree;
/**
* Reads the relevant performance counter data from the store.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
*/
public class CounterSetBTreeSelector implements ICounterSelector {
// private static final Logger log = Logger.getLogger(CounterSetBTreeSelector.class);
private final CounterSetBTree btree;
/**
*
* @param btree
* The {@link CounterSetBTree}.
*/
public CounterSetBTreeSelector(final CounterSetBTree btree) {
if (btree == null)
throw new IllegalStateException();
this.btree = btree;
}
@Override
@SuppressWarnings("rawtypes")
public ICounter[] selectCounters(final int depth, final Pattern pattern,
final long fromTime, final long toTime, final PeriodEnum period,
final boolean historyRequiredIsIgnored) {
final CounterSet counterSet = btree.rangeIterator(fromTime, toTime,
period.toTimeUnit(), pattern, depth);
// filter was already applied.
final Iterator<ICounter> itr = counterSet
.getCounters(null/* filter */);
final Vector<ICounter> v = new Vector<ICounter>();
// int ndistinct = 0;
while (itr.hasNext()) {
final ICounter c = itr.next();
// if (depth != 0 && c.getDepth() > depth)
// continue;
//
// ndistinct++;
//
// if (log.isDebugEnabled())
// log.debug("Selected: ndistinct=" + ndistinct + " : " + c);
v.add(c);
}
// if (log.isInfoEnabled())
// log.info("Selected: ndistinct=" + ndistinct);
return v.toArray(new ICounter[v.size()]);
}
}