/**
* Copyright (c) 2002-2011 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j 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 org.neo4j.kernel.impl.core;
import static org.junit.Assert.fail;
import static org.neo4j.kernel.impl.AbstractNeo4jTestCase.deleteFileOrDirectory;
import static org.neo4j.kernel.impl.nioneo.store.TestXa.copyLogicalLog;
import static org.neo4j.kernel.impl.nioneo.store.TestXa.renameCopiedLogicalLog;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import org.junit.Test;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Transaction;
import org.neo4j.helpers.Pair;
import org.neo4j.kernel.EmbeddedGraphDatabase;
public class TestChangingOfLogFormat
{
@Test
public void inabilityToStartFromOldFormatFromNonCleanShutdown() throws Exception
{
String storeDir = "target/var/oldlog";
deleteFileOrDirectory( storeDir );
GraphDatabaseService db = new EmbeddedGraphDatabase( storeDir );
Transaction tx = db.beginTx();
db.createNode();
tx.success();
tx.finish();
Pair<Pair<File, File>, Pair<File, File>> copy = copyLogicalLog( storeDir );
decrementLogFormat( copy.other().other() );
db.shutdown();
renameCopiedLogicalLog( storeDir );
try
{
db = new EmbeddedGraphDatabase( storeDir );
fail( "Shouldn't be able to do recovery (and upgrade log format version) on non-clean shutdown" );
}
catch ( Exception e )
{ // Good
e.printStackTrace();
}
}
private void decrementLogFormat( File file ) throws IOException
{
// Gotten from LogIoUtils class
RandomAccessFile raFile = new RandomAccessFile( file, "rw" );
FileChannel channel = raFile.getChannel();
ByteBuffer buffer = ByteBuffer.wrap( new byte[8] );
channel.read( buffer );
buffer.flip();
long version = buffer.getLong();
long logFormatVersion = (version >>> 56);
version = version & 0x00FFFFFFFFFFFFFFL;
long oldVersion = version | ( ((long) logFormatVersion-1) << 56 );
channel.position( 0 );
buffer.clear();
buffer.putLong( oldVersion );
buffer.flip();
channel.write( buffer );
raFile.close();
}
}