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SpatialIndexPopulator.java
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SpatialIndexPopulator.java
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/*
* Copyright (c) 2002-2019 "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 <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.index.schema;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.neo4j.gis.spatial.index.curves.SpaceFillingCurveConfiguration;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.pagecache.IOLimiter;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.api.exceptions.index.IndexEntryConflictException;
import org.neo4j.kernel.api.index.IndexEntryUpdate;
import org.neo4j.kernel.api.index.IndexPopulator;
import org.neo4j.kernel.api.index.IndexProvider;
import org.neo4j.kernel.api.index.IndexUpdater;
import org.neo4j.kernel.impl.index.schema.config.SpaceFillingCurveSettings;
import org.neo4j.storageengine.api.NodePropertyAccessor;
import org.neo4j.storageengine.api.schema.IndexSample;
import org.neo4j.storageengine.api.schema.StoreIndexDescriptor;
import org.neo4j.values.storable.CoordinateReferenceSystem;
import org.neo4j.values.storable.PointValue;
import org.neo4j.values.storable.Value;
import static org.neo4j.index.internal.gbptree.GBPTree.NO_HEADER_WRITER;
import static org.neo4j.kernel.impl.index.schema.fusion.FusionIndexBase.forAll;
import static org.neo4j.kernel.impl.index.schema.fusion.FusionIndexSampler.combineSamples;
class SpatialIndexPopulator extends SpatialIndexCache<WorkSyncedNativeIndexPopulator<SpatialIndexKey,NativeIndexValue>> implements IndexPopulator
{
SpatialIndexPopulator( StoreIndexDescriptor descriptor, SpatialIndexFiles spatialIndexFiles, PageCache pageCache,
FileSystemAbstraction fs, IndexProvider.Monitor monitor, SpaceFillingCurveConfiguration configuration )
{
super( new PartFactory( pageCache, fs, spatialIndexFiles, descriptor, monitor, configuration ) );
}
@Override
public synchronized void create()
{
forAll( p -> p.getActual().clear(), this );
// We must make sure to have at least one subindex:
// to be able to persist failure and to have the right state in the beginning
if ( !this.iterator().hasNext() )
{
select( CoordinateReferenceSystem.WGS84 );
}
}
@Override
public synchronized void drop()
{
forAll( IndexPopulator::drop, this );
}
@Override
public void add( Collection<? extends IndexEntryUpdate<?>> updates ) throws IndexEntryConflictException
{
Map<CoordinateReferenceSystem,List<IndexEntryUpdate<?>>> batchMap = new HashMap<>();
for ( IndexEntryUpdate<?> update : updates )
{
PointValue point = (PointValue) update.values()[0];
List<IndexEntryUpdate<?>> batch = batchMap.computeIfAbsent( point.getCoordinateReferenceSystem(), k -> new ArrayList<>() );
batch.add( update );
}
for ( Map.Entry<CoordinateReferenceSystem,List<IndexEntryUpdate<?>>> entry : batchMap.entrySet() )
{
IndexPopulator partPopulator = select( entry.getKey() );
partPopulator.add( entry.getValue() );
}
}
@Override
public void verifyDeferredConstraints( NodePropertyAccessor nodePropertyAccessor ) throws IndexEntryConflictException
{
for ( IndexPopulator part : this )
{
part.verifyDeferredConstraints( nodePropertyAccessor );
}
}
@Override
public IndexUpdater newPopulatingUpdater( NodePropertyAccessor accessor )
{
return new SpatialIndexPopulatingUpdater( this, accessor );
}
@Override
public synchronized void close( boolean populationCompletedSuccessfully )
{
closeInstantiateCloseLock();
for ( IndexPopulator part : this )
{
part.close( populationCompletedSuccessfully );
}
}
@Override
public synchronized void markAsFailed( String failure )
{
for ( IndexPopulator part : this )
{
part.markAsFailed( failure );
}
}
@Override
public void includeSample( IndexEntryUpdate<?> update )
{
Value[] values = update.values();
assert values.length == 1;
uncheckedSelect( ((PointValue) values[0]).getCoordinateReferenceSystem() ).includeSample( update );
}
@Override
public IndexSample sampleResult()
{
List<IndexSample> samples = new ArrayList<>();
for ( IndexPopulator partPopulator : this )
{
samples.add( partPopulator.sampleResult() );
}
return combineSamples( samples );
}
static class PartPopulator extends NativeIndexPopulator<SpatialIndexKey,NativeIndexValue>
{
private final SpaceFillingCurveConfiguration configuration;
private final SpaceFillingCurveSettings settings;
PartPopulator( PageCache pageCache, FileSystemAbstraction fs, SpatialIndexFiles.SpatialFileLayout fileLayout, IndexProvider.Monitor monitor,
StoreIndexDescriptor descriptor, SpaceFillingCurveConfiguration configuration )
{
super( pageCache, fs, fileLayout.getIndexFile(), fileLayout.layout, monitor, descriptor, NO_HEADER_WRITER );
this.configuration = configuration;
this.settings = fileLayout.settings;
}
@Override
public void verifyDeferredConstraints( NodePropertyAccessor nodePropertyAccessor ) throws IndexEntryConflictException
{
SpatialVerifyDeferredConstraint.verify( nodePropertyAccessor, layout, tree, descriptor );
super.verifyDeferredConstraints( nodePropertyAccessor );
}
@Override
boolean canCheckConflictsWithoutStoreAccess()
{
return false;
}
@Override
ConflictDetectingValueMerger<SpatialIndexKey,NativeIndexValue,Value[]> getMainConflictDetector()
{
// Because of lossy point representation in index we need to always compare on node id,
// even for unique indexes. If we don't we risk throwing constraint violation exception
// for points that are in fact unique.
return new ThrowingConflictDetector<>( true );
}
@Override
NativeIndexReader<SpatialIndexKey, NativeIndexValue> newReader()
{
return new SpatialIndexPartReader<>( tree, layout, descriptor, configuration );
}
@Override
public synchronized void create()
{
create( settings.headerWriter( BYTE_POPULATING ) );
}
@Override
void markTreeAsOnline()
{
tree.checkpoint( IOLimiter.UNLIMITED, settings.headerWriter( BYTE_ONLINE ) );
}
}
static class PartFactory implements Factory<WorkSyncedNativeIndexPopulator<SpatialIndexKey,NativeIndexValue>>
{
private final PageCache pageCache;
private final FileSystemAbstraction fs;
private final SpatialIndexFiles spatialIndexFiles;
private final StoreIndexDescriptor descriptor;
private final IndexProvider.Monitor monitor;
private final SpaceFillingCurveConfiguration configuration;
PartFactory( PageCache pageCache, FileSystemAbstraction fs, SpatialIndexFiles spatialIndexFiles, StoreIndexDescriptor descriptor,
IndexProvider.Monitor monitor, SpaceFillingCurveConfiguration configuration )
{
this.pageCache = pageCache;
this.fs = fs;
this.spatialIndexFiles = spatialIndexFiles;
this.descriptor = descriptor;
this.monitor = monitor;
this.configuration = configuration;
}
@Override
public WorkSyncedNativeIndexPopulator<SpatialIndexKey,NativeIndexValue> newSpatial( CoordinateReferenceSystem crs )
{
return create( spatialIndexFiles.forCrs( crs ).getLayoutForNewIndex() );
}
private WorkSyncedNativeIndexPopulator<SpatialIndexKey,NativeIndexValue> create( SpatialIndexFiles.SpatialFileLayout fileLayout )
{
PartPopulator populator = new PartPopulator( pageCache, fs, fileLayout, monitor, descriptor, configuration );
populator.create();
return new WorkSyncedNativeIndexPopulator<>( populator );
}
}
}