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SpatialFusionIndexAccessor.java
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SpatialFusionIndexAccessor.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.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.neo4j.graphdb.ResourceIterator;
import org.neo4j.helpers.collection.BoundedIterable;
import org.neo4j.helpers.collection.CombiningIterable;
import org.neo4j.kernel.api.exceptions.index.IndexEntryConflictException;
import org.neo4j.kernel.api.index.IndexAccessor;
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.IndexUpdateMode;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.index.schema.SpatialKnownIndex;
import org.neo4j.storageengine.api.schema.IndexReader;
import org.neo4j.values.storable.CoordinateReferenceSystem;
import static org.neo4j.helpers.collection.Iterators.concatResourceIterators;
import static org.neo4j.kernel.impl.index.schema.fusion.FusionIndexUtils.forAll;
class SpatialFusionIndexAccessor implements IndexAccessor
{
private final Map<CoordinateReferenceSystem,SpatialKnownIndex> indexMap;
private final long indexId;
private final IndexDescriptor descriptor;
private final IndexSamplingConfig samplingConfig;
private final SpatialKnownIndex.Factory indexFactory;
SpatialFusionIndexAccessor( Map<CoordinateReferenceSystem,SpatialKnownIndex> indexMap, long indexId, IndexDescriptor descriptor,
IndexSamplingConfig samplingConfig, SpatialKnownIndex.Factory indexFactory ) throws IOException
{
this.indexMap = indexMap;
this.indexId = indexId;
this.descriptor = descriptor;
this.samplingConfig = samplingConfig;
this.indexFactory = indexFactory;
for ( SpatialKnownIndex index : indexMap.values() )
{
index.takeOnline(descriptor, samplingConfig);
}
}
@Override
public void drop() throws IOException
{
forAll( index -> ((SpatialKnownIndex) index).drop(), indexMap.values().toArray() );
}
@Override
public IndexUpdater newUpdater( IndexUpdateMode mode )
{
return SpatialFusionIndexUpdater.updaterForAccessor( indexMap, indexId, indexFactory, descriptor, samplingConfig );
}
@Override
public void force() throws IOException
{
forAll( entry -> ((SpatialKnownIndex) entry).force(), indexMap.values().toArray() );
}
@Override
public void refresh() throws IOException
{
// not required in this implementation
}
@Override
public void close() throws IOException
{
forAll( entry -> ((SpatialKnownIndex) entry).close(), indexMap.values().toArray() );
}
@Override
public IndexReader newReader()
{
Map<CoordinateReferenceSystem,IndexReader> indexReaders = new HashMap<>();
for ( Map.Entry<CoordinateReferenceSystem,SpatialKnownIndex> index : indexMap.entrySet() )
{
// TODO should this be populated here, or delegate to SpatialFusionIndexReader?
indexReaders.put( index.getKey(), index.getValue().newReader( samplingConfig, descriptor ) );
}
return new SpatialFusionIndexReader( indexReaders, descriptor );
}
@Override
public BoundedIterable<Long> newAllEntriesReader()
{
ArrayList<BoundedIterable<Long>> allEntriesReader = new ArrayList<>();
for ( SpatialKnownIndex index : indexMap.values() )
{
allEntriesReader.add( index.newAllEntriesReader() );
}
return new BoundedIterable<Long>()
{
@Override
public long maxCount()
{
return allEntriesReader.stream().map( BoundedIterable::maxCount ).reduce( 0L, ( acc, e ) ->
{
if ( acc == UNKNOWN_MAX_COUNT || e == UNKNOWN_MAX_COUNT )
{
return UNKNOWN_MAX_COUNT;
}
return acc + e;
} );
}
@Override
public void close() throws Exception
{
forAll( entries -> ((BoundedIterable) entries).close(), allEntriesReader.toArray() );
}
@Override
public Iterator<Long> iterator()
{
return new CombiningIterable( allEntriesReader ).iterator();
}
};
}
@Override
public ResourceIterator<File> snapshotFiles() throws IOException
{
List<ResourceIterator<File>> snapshotFiles = new ArrayList<>();
for ( SpatialKnownIndex index : indexMap.values() )
{
snapshotFiles.add( index.snapshotFiles() );
}
return concatResourceIterators( snapshotFiles.iterator() );
}
@Override
public void verifyDeferredConstraints( PropertyAccessor propertyAccessor )
throws IndexEntryConflictException, IOException
{
// Not needed since uniqueness is verified automatically w/o cost for every update.
}
}