/**
* Copyright (C) 2009-2015 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.store.statistics;
import com.foundationdb.ais.model.Index;
import com.foundationdb.server.service.tree.KeyCreator;
import com.foundationdb.server.store.statistics.histograms.Sampler;
import com.persistit.Key;
public class MemoryMultiColumnIndexStatisticsVisitor extends IndexStatisticsGenerator<Key,byte[]>
{
public MemoryMultiColumnIndexStatisticsVisitor(Index index, KeyCreator keyCreator) {
super(new PersistitKeyFlywheel(keyCreator), index, index.getKeyColumns().size(), -1);
}
@Override
public void visit(Key key, byte[] value) {
loadKey(key);
}
@Override
public Sampler<Key> createKeySampler(int bucketCount, long distinctCount) {
return new Sampler<>(
new PersistitKeySplitter(columnCount(), getKeysFlywheel()),
bucketCount,
distinctCount,
getKeysFlywheel()
);
}
@Override
protected byte[] copyOfKeyBytes(Key key) {
byte[] copy = new byte[key.getEncodedSize()];
System.arraycopy(key.getEncodedBytes(), 0, copy, 0, copy.length);
return copy;
}
}