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SpatialFusionIndexPopulator.java
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SpatialFusionIndexPopulator.java
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/*
* Copyright (c) 2002-2018 "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.index.schema.fusion;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
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.IndexUpdater;
import org.neo4j.kernel.api.index.PropertyAccessor;
import org.neo4j.kernel.api.schema.index.IndexDescriptor;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.index.schema.SpatialKnownIndex;
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.FusionIndexUtils.forAll;
import static org.neo4j.kernel.impl.index.schema.fusion.FusionSchemaIndexProvider.combineSamples;
class SpatialFusionIndexPopulator implements IndexPopulator
{
private final long indexId;
private final IndexDescriptor descriptor;
private final IndexSamplingConfig samplingConfig;
private final SpatialKnownIndex.Factory indexFactory;
private final Map<CoordinateReferenceSystem,SpatialKnownIndex> indexMap;
SpatialFusionIndexPopulator( Map<CoordinateReferenceSystem,SpatialKnownIndex> indexMap, long indexId, IndexDescriptor descriptor,
IndexSamplingConfig samplingConfig, SpatialKnownIndex.Factory indexFactory )
{
this.indexMap = indexMap;
this.indexId = indexId;
this.descriptor = descriptor;
this.samplingConfig = samplingConfig;
this.indexFactory = indexFactory;
}
@Override
public void create() throws IOException
{
// When an index is first created using `CREATE INDEX` or `graph.schema.for*` then a call will be made here,
// however, the KnownSpatialIndex will not yet exist, since that can only be created on demand
assert indexMap.isEmpty();
}
@Override
public void drop() throws IOException
{
forAll( entry -> ((SpatialKnownIndex) entry).getPopulator( descriptor, samplingConfig ).drop(), indexMap.values().toArray() );
}
@Override
public void add( Collection<? extends IndexEntryUpdate<?>> updates ) throws IndexEntryConflictException, IOException
{
Map<CoordinateReferenceSystem,Collection<IndexEntryUpdate<?>>> batchMap = new HashMap<>();
for ( Map.Entry<CoordinateReferenceSystem,SpatialKnownIndex> index : indexMap.entrySet() )
{
batchMap.put( index.getKey(), new ArrayList<>() );
}
for ( IndexEntryUpdate<?> update : updates )
{
selectUpdates( batchMap, update.values() ).add( update );
}
for ( CoordinateReferenceSystem crs : batchMap.keySet() )
{
indexFactory.selectAndCreate( indexMap, indexId, crs ).getPopulator( descriptor, samplingConfig ).add( batchMap.get( crs ) );
}
}
private Collection<IndexEntryUpdate<?>> selectUpdates( Map<CoordinateReferenceSystem,Collection<IndexEntryUpdate<?>>> instances, Value... values )
{
assert values.length == 1;
PointValue pointValue = (PointValue) values[0];
return instances.computeIfAbsent( pointValue.getCoordinateReferenceSystem(), k -> new ArrayList<>() );
}
@Override
public void verifyDeferredConstraints( PropertyAccessor propertyAccessor )
throws IndexEntryConflictException, IOException
{
forAll( entry -> ((SpatialKnownIndex) entry).getPopulator( descriptor, samplingConfig ).verifyDeferredConstraints( propertyAccessor ),
indexMap.values().toArray() );
}
@Override
public IndexUpdater newPopulatingUpdater( PropertyAccessor accessor ) throws IOException
{
return new SpatialFusionIndexUpdater( indexMap, indexId, indexFactory, descriptor, samplingConfig, accessor );
}
@Override
public void close( boolean populationCompletedSuccessfully ) throws IOException
{
forAll( entry -> ((SpatialKnownIndex) entry).closePopulator( descriptor, samplingConfig, populationCompletedSuccessfully ),
indexMap.values().toArray() );
}
@Override
public void markAsFailed( String failure ) throws IOException
{
forAll( entry -> ((SpatialKnownIndex) entry).getPopulator( descriptor, samplingConfig ).markAsFailed( failure ), indexMap.values().toArray() );
}
@Override
public void includeSample( IndexEntryUpdate<?> update )
{
Value[] values = update.values();
assert values.length == 1;
SpatialKnownIndex index = indexFactory.selectAndCreate( indexMap, indexId, values[0] );
index.getPopulator( descriptor, samplingConfig ).includeSample( update );
}
@Override
public IndexSample sampleResult()
{
return combineSamples(
indexMap.values().stream().map( i -> i.getPopulator( descriptor, samplingConfig ).sampleResult() ).toArray( IndexSample[]::new ) );
}
}