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SpatialIndexPopulator.java
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SpatialIndexPopulator.java
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/*
* Copyright (c) 2002-2018 "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.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.StreamSupport;
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.api.index.PropertyAccessor;
import org.neo4j.kernel.api.schema.index.SchemaIndexDescriptor;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.index.schema.config.SpaceFillingCurveSettings;
import org.neo4j.storageengine.api.schema.IndexReader;
import org.neo4j.storageengine.api.schema.IndexSample;
import org.neo4j.values.storable.CoordinateReferenceSystem;
import org.neo4j.values.storable.PointValue;
import org.neo4j.values.storable.Value;
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<SpatialIndexPopulator.PartPopulator> implements IndexPopulator
{
SpatialIndexPopulator( long indexId,
SchemaIndexDescriptor descriptor,
IndexSamplingConfig samplingConfig,
SpatialIndexFiles spatialIndexFiles,
PageCache pageCache,
FileSystemAbstraction fs,
IndexProvider.Monitor monitor,
SpaceFillingCurveConfiguration configuration )
{
super( new PartFactory( pageCache, fs, spatialIndexFiles, indexId, descriptor, monitor, samplingConfig, configuration ) );
}
@Override
public synchronized void create() throws IOException
{
forAll( NativeSchemaIndexPopulator::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() throws IOException
{
forAll( NativeSchemaIndexPopulator::drop, this );
}
@Override
public void add( Collection<? extends IndexEntryUpdate<?>> updates ) throws IOException, 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() )
{
PartPopulator partPopulator = select( entry.getKey() );
partPopulator.add( entry.getValue() );
}
}
@Override
public void verifyDeferredConstraints( PropertyAccessor propertyAccessor )
throws IndexEntryConflictException, IOException
{
// No-op, uniqueness is checked for each update in add(IndexEntryUpdate)
}
@Override
public IndexUpdater newPopulatingUpdater( PropertyAccessor accessor )
{
return new SpatialIndexPopulatingUpdater( this, accessor );
}
@Override
public synchronized void close( boolean populationCompletedSuccessfully ) throws IOException
{
closeInstantiateCloseLock();
for ( NativeSchemaIndexPopulator part : this )
{
part.close( populationCompletedSuccessfully );
}
}
@Override
public synchronized void markAsFailed( String failure )
{
for ( NativeSchemaIndexPopulator 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()
{
IndexSample[] indexSamples = StreamSupport.stream( this.spliterator(), false )
.map( PartPopulator::sampleResult )
.toArray( IndexSample[]::new );
return combineSamples( indexSamples );
}
static class PartPopulator extends NativeSchemaIndexPopulator<SpatialSchemaKey, NativeSchemaValue>
{
private final SpaceFillingCurveConfiguration configuration;
private final SpaceFillingCurveSettings settings;
PartPopulator( PageCache pageCache, FileSystemAbstraction fs, SpatialIndexFiles.SpatialFileLayout fileLayout,
IndexProvider.Monitor monitor, SchemaIndexDescriptor descriptor, long indexId, IndexSamplingConfig samplingConfig,
SpaceFillingCurveConfiguration configuration )
{
super( pageCache, fs, fileLayout.getIndexFile(), fileLayout.layout, monitor, descriptor, indexId, samplingConfig );
this.configuration = configuration;
this.settings = fileLayout.settings;
}
@Override
IndexReader newReader()
{
return new SpatialIndexPartReader<>( tree, layout, samplingConfig, descriptor, configuration );
}
@Override
public synchronized void create() throws IOException
{
create( settings.headerWriter( BYTE_POPULATING ) );
}
@Override
void markTreeAsOnline() throws IOException
{
tree.checkpoint( IOLimiter.unlimited(), settings.headerWriter( BYTE_ONLINE ) );
}
}
static class PartFactory implements Factory<PartPopulator>
{
private final PageCache pageCache;
private final FileSystemAbstraction fs;
private final SpatialIndexFiles spatialIndexFiles;
private final long indexId;
private final SchemaIndexDescriptor descriptor;
private final IndexProvider.Monitor monitor;
private final IndexSamplingConfig samplingConfig;
private final SpaceFillingCurveConfiguration configuration;
PartFactory( PageCache pageCache, FileSystemAbstraction fs, SpatialIndexFiles spatialIndexFiles, long indexId,
SchemaIndexDescriptor descriptor, IndexProvider.Monitor monitor, IndexSamplingConfig samplingConfig,
SpaceFillingCurveConfiguration configuration )
{
this.pageCache = pageCache;
this.fs = fs;
this.spatialIndexFiles = spatialIndexFiles;
this.indexId = indexId;
this.descriptor = descriptor;
this.monitor = monitor;
this.samplingConfig = samplingConfig;
this.configuration = configuration;
}
@Override
public PartPopulator newSpatial( CoordinateReferenceSystem crs ) throws IOException
{
return create( spatialIndexFiles.forCrs( crs ).getLayoutForNewIndex() );
}
private PartPopulator create( SpatialIndexFiles.SpatialFileLayout fileLayout ) throws IOException
{
PartPopulator populator = new PartPopulator( pageCache, fs, fileLayout, monitor, descriptor, indexId, samplingConfig, configuration );
populator.create();
return populator;
}
}
}