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PropertyRecordFormatTest.java
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PropertyRecordFormatTest.java
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/*
* Copyright (c) 2002-2016 "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.store.format.highlimit;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.util.concurrent.ThreadLocalRandom;
import org.neo4j.io.ByteUnit;
import org.neo4j.io.pagecache.StubPageCursor;
import org.neo4j.kernel.impl.store.IntStoreHeader;
import org.neo4j.kernel.impl.store.format.highlimit.v30.PropertyRecordFormatV3_0;
import org.neo4j.kernel.impl.store.record.PropertyRecord;
import org.neo4j.kernel.impl.store.record.Record;
import org.neo4j.kernel.impl.store.record.RecordLoad;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
public class PropertyRecordFormatTest
{
private static final int DATA_SIZE = 100;
private static final long TOO_BIG_REFERENCE = 1L << (Integer.SIZE + (Byte.SIZE * 3));
private PropertyRecordFormat recordFormat;
private StubPageCursor pageCursor;
private ConstantIdSequence idSequence;
@Before
public void setUp()
{
recordFormat = new PropertyRecordFormat();
pageCursor = new StubPageCursor( 0, (int) ByteUnit.kibiBytes( 8 ) );
idSequence = new ConstantIdSequence();
}
@After
public void tearDown()
{
pageCursor.close();
}
@Test
public void writeAndReadRecordWithRelativeReferences() throws IOException
{
int recordSize = recordFormat.getRecordSize( new IntStoreHeader( DATA_SIZE ) );
long recordId = 0xF1F1F1F1F1F1L;
int recordOffset = pageCursor.getOffset();
PropertyRecord record = createRecord( recordFormat, recordId );
recordFormat.write( record, pageCursor, recordSize );
PropertyRecord recordFromStore = recordFormat.newRecord();
recordFromStore.setId( recordId );
resetCursor( pageCursor, recordOffset );
recordFormat.read( recordFromStore, pageCursor, RecordLoad.NORMAL, recordSize );
// records should be the same
assertEquals( record.getNextProp(), recordFromStore.getNextProp() );
assertEquals( record.getPrevProp(), recordFromStore.getPrevProp() );
// now lets try to read same data into a record with different id - we should get different absolute references
resetCursor( pageCursor, recordOffset );
PropertyRecord recordWithOtherId = recordFormat.newRecord();
recordWithOtherId.setId( 1L );
recordFormat.read( recordWithOtherId, pageCursor, RecordLoad.NORMAL, recordSize );
verifyDifferentReferences(record, recordWithOtherId);
}
@Test
public void readWriteFixedReferencesRecord() throws Exception
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, randomFixedReference(), randomFixedReference() );
writeReadRecord( source, target );
assertTrue( "Record should use fixed reference format.", target.isUseFixedReferences() );
verifySameReferences( source, target );
}
@Test
public void useFixedReferenceFormatWhenNextPropertyIsMissing() throws IOException
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, randomFixedReference(), Record.NULL_REFERENCE.byteValue() );
writeReadRecord( source, target );
assertTrue( "Record should use fixed reference format.", target.isUseFixedReferences() );
verifySameReferences( source, target );
}
@Test
public void useFixedReferenceFormatWhenPreviousPropertyIsMissing() throws IOException
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, Record.NULL_REFERENCE.intValue(), randomFixedReference() );
writeReadRecord( source, target );
assertTrue( "Record should use fixed reference format.", target.isUseFixedReferences() );
verifySameReferences( source, target );
}
@Test
public void useVariableLengthFormatWhenPreviousPropertyReferenceTooBig() throws IOException
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, TOO_BIG_REFERENCE, randomFixedReference() );
writeReadRecord( source, target );
assertFalse( "Record should use variable length reference format.", target.isUseFixedReferences() );
verifySameReferences( source, target );
}
@Test
public void useVariableLengthFormatWhenNextPropertyReferenceTooBig() throws IOException
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, randomFixedReference(), TOO_BIG_REFERENCE );
writeReadRecord( source, target );
assertFalse( "Record should use variable length reference format.", target.isUseFixedReferences() );
verifySameReferences( source, target );
}
@Test
public void useVariableLengthFormatWhenRecordSizeIsTooSmall() throws IOException
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, randomFixedReference(), randomFixedReference() );
writeReadRecord( source, target, PropertyRecordFormat.FIXED_FORMAT_RECORD_SIZE - 1 );
assertFalse( "Record should use variable length reference if format record is too small.", target.isUseFixedReferences() );
verifySameReferences( source, target);
}
@Test
public void useFixedReferenceFormatWhenRecordCanFitInRecordSizeRecord() throws IOException
{
PropertyRecord source = new PropertyRecord( 1 );
PropertyRecord target = new PropertyRecord( 1 );
source.initialize( true, randomFixedReference(), randomFixedReference() );
writeReadRecord( source, target, PropertyRecordFormat.FIXED_FORMAT_RECORD_SIZE );
assertTrue( "Record should use fixed reference if can fit in format record.", target.isUseFixedReferences() );
verifySameReferences( source, target);
}
@Test
public void readSingleUnitRecordStoredNotInFixedReferenceFormat() throws Exception
{
PropertyRecord oldFormatRecord = new PropertyRecord( 1 );
PropertyRecord newFormatRecord = new PropertyRecord( 1 );
oldFormatRecord.initialize( true, randomFixedReference(), randomFixedReference() );
writeRecordWithOldFormat( oldFormatRecord );
assertFalse( "This should be single unit record.", oldFormatRecord.hasSecondaryUnitId() );
assertFalse( "Old format is not aware about fixed references.", oldFormatRecord.isUseFixedReferences() );
recordFormat.read( newFormatRecord, pageCursor, RecordLoad.NORMAL, PropertyRecordFormat.RECORD_SIZE );
verifySameReferences( oldFormatRecord, newFormatRecord );
}
private void writeRecordWithOldFormat( PropertyRecord oldFormatRecord ) throws IOException
{
int oldRecordSize = PropertyRecordFormatV3_0.RECORD_SIZE;
PropertyRecordFormatV3_0 recordFormatV30 = new PropertyRecordFormatV3_0();
recordFormatV30.prepare( oldFormatRecord, oldRecordSize, idSequence );
recordFormatV30.write( oldFormatRecord, pageCursor, oldRecordSize );
pageCursor.setOffset( 0 );
}
private void verifySameReferences( PropertyRecord recordA, PropertyRecord recordB )
{
assertEquals( recordA.getNextProp(), recordB.getNextProp() );
assertEquals( recordA.getPrevProp(), recordB.getPrevProp() );
}
private void verifyDifferentReferences(PropertyRecord recordA, PropertyRecord recordB)
{
assertNotEquals( recordA.getNextProp(), recordB.getNextProp() );
assertNotEquals( recordA.getPrevProp(), recordB.getPrevProp() );
}
private void writeReadRecord( PropertyRecord source, PropertyRecord target ) throws java.io.IOException
{
writeReadRecord( source, target, PropertyRecordFormat.RECORD_SIZE );
}
private void writeReadRecord( PropertyRecord source, PropertyRecord target, int recordSize )
throws java.io.IOException
{
recordFormat.prepare( source, recordSize, idSequence );
recordFormat.write( source, pageCursor, recordSize );
pageCursor.setOffset( 0 );
recordFormat.read( target, pageCursor, RecordLoad.NORMAL, recordSize );
}
private long randomFixedReference()
{
return randomReference( 1L << (Integer.SIZE + (Byte.SIZE * 2)) );
}
private long randomReference( long maxValue )
{
return ThreadLocalRandom.current().nextLong( maxValue );
}
private void resetCursor( StubPageCursor cursor, int recordOffset )
{
cursor.setOffset( recordOffset );
}
private PropertyRecord createRecord( PropertyRecordFormat format, long recordId )
{
PropertyRecord record = format.newRecord();
record.setInUse( true );
record.setId( recordId );
record.setNextProp( 1L );
record.setPrevProp( (Integer.MAX_VALUE + 1L) << Byte.SIZE * 3 );
return record;
}
}