/**
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 Feb 16, 2007
*/
package com.bigdata.journal;
import java.nio.ByteBuffer;
import com.bigdata.btree.BTree;
import com.bigdata.rawstore.IRawStore;
import com.bigdata.rawstore.SimpleMemoryRawStore;
/**
* Test suite for {@link CommitRecordIndex}. Tests focus on get (exact match)
* vs find (most recent match less than or equal to) and restart safety.
*
* @see TestCommitHistory, which tests the {@link CommitRecordIndex} in situ.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestCommitRecordIndex extends AbstractCommitRecordTestCase {
/**
*
*/
public TestCommitRecordIndex() {
}
/**
* @param name
*/
public TestCommitRecordIndex(String name) {
super(name);
}
/**
* Tests the ability to perform an exact match on a commit time and return
* the address for the associated commit record. This also tests fence posts
* for find and restart-safety for one entry.
*/
public void test_basics() {
IRawStore store = new SimpleMemoryRawStore();
CommitRecordIndex ndx = CommitRecordIndex.create(store);
final ICommitRecord cr1 = getRandomCommitRecord();
final long addr1 = store.write(ByteBuffer
.wrap(CommitRecordSerializer.INSTANCE.serialize(cr1)));
// verify existence test (not found).
assertFalse(ndx.hasTimestamp(cr1.getTimestamp()));
// verify get (exact match).
assertNull(ndx.get(cr1.getTimestamp()));
// verify find (record with largest timestamp less than or equal to).
assertNull(ndx.find(cr1.getTimestamp()));
// add commit record.
ndx.add(addr1, cr1);
try {
/*
* correct rejection of another entry with the same commit time.
*/
ndx.add(addr1, cr1);
} catch(IllegalArgumentException ex) {
System.err.println("Ignoring expected exception: "+ex);
}
// verify existence test.
assertTrue(ndx.hasTimestamp(cr1.getTimestamp()));
// verify get (exact match).
assertEquals(cr1,ndx.get(cr1.getTimestamp()));
// verify find (exact match).
assertEquals(cr1,ndx.find(cr1.getTimestamp()));
// verify find (no match given timestamp less than any available).
assertNull(ndx.find(cr1.getTimestamp()-1));
// verify find (match given timestamp greater than any available).
assertEquals(cr1,ndx.find(cr1.getTimestamp()+1));
// write index on store.
long ndx_addr = ndx.writeCheckpoint();
{
// reload the index from the store.
ndx = (CommitRecordIndex) BTree
.load(store, ndx_addr, true/* readOnly */);
// verify existence test.
assertTrue(ndx.hasTimestamp(cr1.getTimestamp()));
// verify get (exact match).
assertEquals(cr1,ndx.get(cr1.getTimestamp()));
// verify find (exact match).
assertEquals(cr1,ndx.find(cr1.getTimestamp()));
// verify find (no match given timestamp less than any available).
assertNull(ndx.find(cr1.getTimestamp()-1));
// verify find (match given timestamp greater than any available).
assertEquals(cr1,ndx.find(cr1.getTimestamp()+1));
}
}
}