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LogEntryParserDispatcherV6Test.java
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LogEntryParserDispatcherV6Test.java
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/*
* Copyright (c) 2002-2017 "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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.transaction.log.entry;
import org.junit.Test;
import java.io.IOException;
import org.neo4j.kernel.impl.storageengine.impl.recordstorage.RecordStorageCommandReaderFactory;
import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.kernel.impl.transaction.command.Command;
import org.neo4j.kernel.impl.transaction.command.NeoCommandType;
import org.neo4j.kernel.impl.transaction.log.InMemoryClosableChannel;
import org.neo4j.kernel.impl.transaction.log.LogPosition;
import org.neo4j.kernel.impl.transaction.log.LogPositionMarker;
import org.neo4j.storageengine.api.CommandReaderFactory;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
public class LogEntryParserDispatcherV6Test
{
private final LogEntryVersion version = LogEntryVersion.CURRENT;
private final CommandReaderFactory commandReader = new RecordStorageCommandReaderFactory();
private final LogPositionMarker marker = new LogPositionMarker();
private final LogPosition position = new LogPosition( 0, 29 );
@Test
public void shouldParserStartEntry() throws IOException
{
// given
final LogEntryStart start = new LogEntryStart( version, 1, 2, 3, 4, new byte[]{5}, position );
final InMemoryClosableChannel channel = new InMemoryClosableChannel();
channel.putInt( start.getMasterId() );
channel.putInt( start.getLocalId() );
channel.putLong( start.getTimeWritten() );
channel.putLong( start.getLastCommittedTxWhenTransactionStarted() );
channel.putInt( start.getAdditionalHeader().length );
channel.put( start.getAdditionalHeader(), start.getAdditionalHeader().length );
channel.getCurrentPosition( marker );
// when
final LogEntryParser parser = version.entryParser( LogEntryByteCodes.TX_START );
final LogEntry logEntry = parser.parse( version, channel, marker, commandReader );
// then
assertEquals( start, logEntry );
assertFalse( parser.skip() );
}
@Test
public void shouldParserOnePhaseCommitEntry() throws IOException
{
// given
final LogEntryCommit commit = new LogEntryCommit( version, 42, 21 );
final InMemoryClosableChannel channel = new InMemoryClosableChannel();
channel.putLong( commit.getTxId() );
channel.putLong( commit.getTimeWritten() );
channel.getCurrentPosition( marker );
// when
final LogEntryParser parser = version.entryParser( LogEntryByteCodes.TX_COMMIT );
final LogEntry logEntry = parser.parse( version, channel, marker, commandReader );
// then
assertEquals( commit, logEntry );
assertFalse( parser.skip() );
}
@Test
public void shouldParserCommandsUsingAGivenFactory() throws IOException
{
// given
// The record, it will be used as before and after
NodeRecord theRecord = new NodeRecord( 1 );
Command.NodeCommand nodeCommand = new Command.NodeCommand( theRecord, theRecord );
final LogEntryCommand command = new LogEntryCommand( version, nodeCommand );
final InMemoryClosableChannel channel = new InMemoryClosableChannel();
channel.put( NeoCommandType.NODE_COMMAND );
channel.putLong( theRecord.getId() );
// record image before
channel.put( (byte) 0 ); // not in use
channel.putInt( 0 ); // number of dynamic records in use
// record image after
channel.put( (byte) 0 ); // not in use
channel.putInt( 0 ); // number of dynamic records in use
channel.getCurrentPosition( marker );
// when
final LogEntryParser parser = version.entryParser( LogEntryByteCodes.COMMAND );
final LogEntry logEntry = parser.parse( version, channel, marker, commandReader );
// then
assertEquals( command, logEntry );
assertFalse( parser.skip() );
}
@Test
public void shouldParseCheckPointEntry() throws IOException
{
// given
final CheckPoint checkPoint = new CheckPoint( new LogPosition( 43, 44 ) );
final InMemoryClosableChannel channel = new InMemoryClosableChannel();
channel.putLong( checkPoint.getLogPosition().getLogVersion() );
channel.putLong( checkPoint.getLogPosition().getByteOffset() );
channel.getCurrentPosition( marker );
// when
final LogEntryParser parser = version.entryParser( LogEntryByteCodes.CHECK_POINT );
final LogEntry logEntry = parser.parse( version, channel, marker, commandReader );
// then
assertEquals( checkPoint, logEntry );
assertFalse( parser.skip() );
}
@Test( expected = IllegalArgumentException.class )
public void shouldThrowWhenParsingUnknownEntry() throws IOException
{
// when
version.entryParser( (byte)42 ); // unused, at lest for now
// then
// it should throw exception
}
}