/*
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 May 5, 2009
*/
package com.bigdata.btree;
import java.io.File;
import java.io.IOException;
import java.util.UUID;
import com.bigdata.btree.data.IAbstractNodeDataCoder;
import com.bigdata.btree.raba.codec.IRabaCoder;
import com.bigdata.rawstore.IRawStore;
import com.bigdata.rawstore.SimpleMemoryRawStore;
/**
* Test of storing null values under a key with persistence.
* <p>
* Note that the stress tests for the {@link IRabaCoder}s and the
* {@link IAbstractNodeDataCoder}s already test the ability to encode and decode
* with nulls, delete markers, and version timestamps.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestNullValues extends AbstractBTreeTestCase {
/**
*
*/
public TestNullValues() {
}
/**
* @param name
*/
public TestNullValues(String name) {
super(name);
}
private static final boolean bufferNodes = true;
/**
* Tests the ability to store a <code>null</code> in a tuple of a
* {@link BTree}, to reload the {@link BTree} and find the <code>null</code>
* value still under the tuple, and to build an {@link IndexSegmentBuilder}
* from the {@link BTree} and find the <code>null</code> value under the
* tuple.
*
* @throws IOException
* @throws Exception
*/
public void test_nullValues() throws IOException, Exception {
final IRawStore store = new SimpleMemoryRawStore();
final IndexMetadata metadata = new IndexMetadata(UUID.randomUUID());
BTree btree = BTree.create(store, metadata);
final byte[] k1 = new byte[]{1};
assertNull(btree.lookup(k1));
assertFalse(btree.contains(k1));
assertNull(btree.insert(k1, null));
assertNull(btree.lookup(k1));
assertTrue(btree.contains(k1));
final long addrCheckpoint1 = btree.writeCheckpoint();
btree = BTree.load(store, addrCheckpoint1, true/*readOnly*/);
assertNull(btree.lookup(k1));
assertTrue(btree.contains(k1));
File outFile = null;
File tmpDir = null;
try {
outFile = new File(getName() + ".seg");
if (outFile.exists() && !outFile.delete()) {
throw new RuntimeException("Could not delete file: " + outFile);
}
tmpDir = outFile.getAbsoluteFile().getParentFile();
final long commitTime = System.currentTimeMillis();
@SuppressWarnings("unused")
final IndexSegmentCheckpoint checkpoint = IndexSegmentBuilder
.newInstance(outFile, tmpDir, btree.getEntryCount(),
btree.rangeIterator(), 3/* m */,
btree.getIndexMetadata(), commitTime,
true/* compactingMerge */, bufferNodes).call();
// @see BLZG-1501 (remove LRUNexus)
// if (LRUNexus.INSTANCE != null) {
//
// /*
// * Clear the records for the index segment from the cache so we will
// * read directly from the file. This is necessary to ensure that the
// * data on the file is good rather than just the data in the cache.
// */
//
// LRUNexus.INSTANCE.deleteCache(checkpoint.segmentUUID);
//
// }
/*
* Verify can load the index file and that the metadata associated
* with the index file is correct (we are only checking those
* aspects that are easily defined by the test case and not, for
* example, those aspects that depend on the specifics of the length
* of serialized nodes or leaves).
*/
final IndexSegmentStore segStore = new IndexSegmentStore(outFile);
final IndexSegment seg = segStore.loadIndexSegment();
try {
assertNull(seg.lookup(k1));
assertTrue(seg.contains(k1));
} finally {
seg.close();
}
} finally {
if (outFile != null && outFile.exists() && !outFile.delete()) {
log.warn("Could not delete file: " + outFile);
}
}
}
}