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Tool for checking consistency of a Neo4j data store.
/*
* Copyright (c) 2002-2020 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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 implements Owner
{
static final ComparativeRecordChecker
ORPHAN_CHECK =
( record, ignored, engine, records ) -> engine.report().orphanDynamicRecord();
abstract RecordReference record( RecordAccess records );
@Override
public void checkOrphanage()
{
// default: do nothing
}
static class Property extends DynamicOwner
implements ComparativeRecordChecker
{
private final long id;
private final RecordType type;
Property( RecordType type, PropertyRecord record )
{
this.type = type;
this.id = record.getId();
}
@Override
RecordReference record( RecordAccess records )
{
return records.property( id );
}
@Override
public void checkReference( PropertyRecord property, AbstractBaseRecord record,
CheckerEngine engine,
RecordAccess records )
{
if ( record instanceof PropertyRecord )
{
if ( type == RecordType.STRING_PROPERTY )
{
engine.report().stringMultipleOwners( (PropertyRecord) record );
}
else
{
engine.report().arrayMultipleOwners( (PropertyRecord) record );
}
}
else if ( record instanceof DynamicRecord )
{
if ( type == RecordType.STRING_PROPERTY )
{
engine.report().stringMultipleOwners( (DynamicRecord) record );
}
else
{
engine.report().arrayMultipleOwners( (DynamicRecord) record );
}
}
}
}
static class Dynamic extends DynamicOwner
implements ComparativeRecordChecker
{
private final long id;
private final RecordType type;
Dynamic( RecordType type, DynamicRecord record )
{
this.type = type;
this.id = record.getId();
}
@Override
RecordReference record( RecordAccess records )
{
switch ( type )
{
case STRING_PROPERTY:
return records.string( id );
case ARRAY_PROPERTY:
return records.array( id );
case PROPERTY_KEY_NAME:
return records.propertyKeyName( (int)id );
case RELATIONSHIP_TYPE_NAME:
return records.relationshipTypeName( (int) id );
default:
return skipReference();
}
}
@Override
public void checkReference( DynamicRecord block, AbstractBaseRecord record,
CheckerEngine engine,
RecordAccess records )
{
if ( record instanceof PropertyRecord )
{
engine.report().nextMultipleOwners( (PropertyRecord) record );
}
else if ( record instanceof DynamicRecord )
{
engine.report().nextMultipleOwners( (DynamicRecord) record );
}
else if ( record instanceof RelationshipTypeTokenRecord )
{
engine.report().nextMultipleOwners( (RelationshipTypeTokenRecord) record );
}
else if ( record instanceof PropertyKeyTokenRecord )
{
engine.report().nextMultipleOwners( (PropertyKeyTokenRecord) record );
}
}
}
abstract static class NameOwner extends DynamicOwner
implements ComparativeRecordChecker
{
@SuppressWarnings( "ConstantConditions" )
@Override
public void checkReference( RECORD name, AbstractBaseRecord record, CheckerEngine engine,
RecordAccess records )
{
ConsistencyReport.NameConsistencyReport report = engine.report();
if ( record instanceof RelationshipTypeTokenRecord )
{
((ConsistencyReport.RelationshipTypeConsistencyReport) report)
.nameMultipleOwners( (RelationshipTypeTokenRecord) record );
}
else if ( record instanceof PropertyKeyTokenRecord )
{
((ConsistencyReport.PropertyKeyTokenConsistencyReport) report)
.nameMultipleOwners( (PropertyKeyTokenRecord) record );
}
else if ( record instanceof DynamicRecord )
{
report.nameMultipleOwners( (DynamicRecord) record );
}
}
}
static class PropertyKey extends NameOwner
{
private final int id;
PropertyKey( PropertyKeyTokenRecord record )
{
this.id = record.getIntId();
}
@Override
RecordReference record( RecordAccess records )
{
return records.propertyKey( id );
}
}
static class LabelToken extends NameOwner
{
private final int id;
LabelToken( LabelTokenRecord record )
{
this.id = record.getIntId();
}
@Override
RecordReference record( RecordAccess records )
{
return records.label( id );
}
}
static class RelationshipTypeToken extends NameOwner
{
private final int id;
RelationshipTypeToken( RelationshipTypeTokenRecord record )
{
this.id = record.getIntId();
}
@Override
RecordReference record( RecordAccess records )
{
return records.relationshipType( id );
}
}
static class Unknown extends DynamicOwner implements RecordReference
{
private PendingReferenceCheck reporter;
@Override
RecordReference record( RecordAccess records )
{
// Getting the record for this owner means that some other owner replaced it
// that means that it isn't an orphan, so we skip this orphan check
// and return a record for conflict check that always is ok (by skipping the check)
this.markInCustody();
return skipReference();
}
@Override
public void checkOrphanage()
{
PendingReferenceCheck reporter = pop();
if ( reporter != null )
{
reporter.checkReference( null, null );
}
}
void markInCustody()
{
PendingReferenceCheck reporter = pop();
if ( reporter != null )
{
reporter.skip();
}
}
private synchronized PendingReferenceCheck pop()
{
try
{
return this.reporter;
}
finally
{
this.reporter = null;
}
}
@Override
public synchronized void dispatch( PendingReferenceCheck reporter )
{
this.reporter = reporter;
}
}
private DynamicOwner()
{
// only internal subclasses
}
}
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