/**
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 Oct 4, 2011
*/
package com.bigdata.rdf.lexicon;
import com.bigdata.btree.FixedLengthPrefixSplits;
/**
* Split handler enforces the constraint that a collision bucket is never split
* across a shard boundary. This is a necessary constraint. If we were to permit
* the collision bucket to be split across a shard boundary, then the scan for a
* matching entry in the BLOBS index will no longer be shard local and therefore
* would no longer be ACID (that is, it will be busted). The constraint is
* enforced by requiring the separator key to create a distinction in the prefix
* bytes which exclude the collision counter.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class BlobsIndexSplitHandler extends FixedLengthPrefixSplits {
public BlobsIndexSplitHandler() {
super(BlobsIndexHelper.TERMS_INDEX_KEY_SIZE
- BlobsIndexHelper.SIZEOF_COUNTER);
}
}