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FusionIndexPopulator.java
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FusionIndexPopulator.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 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.impl.index.schema.fusion.FusionIndexProvider.DropAction;
import org.neo4j.kernel.impl.index.schema.fusion.FusionIndexProvider.Selector;
import org.neo4j.storageengine.api.schema.IndexSample;
import static org.neo4j.kernel.impl.index.schema.fusion.FusionIndexSampler.combineSamples;
class FusionIndexPopulator extends FusionIndexBase<IndexPopulator> implements IndexPopulator
{
private final long indexId;
private final DropAction dropAction;
FusionIndexPopulator( IndexPopulator[] populators, Selector selector, long indexId, DropAction dropAction )
{
super( populators, selector );
this.indexId = indexId;
this.dropAction = dropAction;
}
@Override
public void create() throws IOException
{
forAll( IndexPopulator::create, instances );
}
@Override
public void drop() throws IOException
{
forAll( IndexPopulator::drop, instances );
dropAction.drop( indexId );
}
@Override
public void add( Collection<? extends IndexEntryUpdate<?>> updates ) throws IndexEntryConflictException, IOException
{
Collection<IndexEntryUpdate<?>>[] batches = new Collection[instances.length];
for ( IndexEntryUpdate<?> update : updates )
{
int slot = selector.selectSlot( update.values() );
Collection<IndexEntryUpdate<?>> batch = batches[slot];
if ( batch == null )
{
batch = new ArrayList<>();
batches[slot] = batch;
}
batch.add( update );
}
for ( int i = 0; i < instances.length; i++ )
{
if ( batches[i] != null )
{
instances[i].add( batches[i] );
}
}
}
@Override
public void verifyDeferredConstraints( PropertyAccessor propertyAccessor )
throws IndexEntryConflictException, IOException
{
for ( IndexPopulator populator : instances )
{
populator.verifyDeferredConstraints( propertyAccessor );
}
}
@Override
public IndexUpdater newPopulatingUpdater( PropertyAccessor accessor ) throws IOException
{
return new FusionIndexUpdater( instancesAs( IndexUpdater.class, populator -> populator.newPopulatingUpdater( accessor ) ), selector );
}
@Override
public void close( boolean populationCompletedSuccessfully ) throws IOException
{
forAll( populator -> populator.close( populationCompletedSuccessfully ), instances );
}
@Override
public void markAsFailed( String failure ) throws IOException
{
forAll( populator -> populator.markAsFailed( failure ), instances );
}
@Override
public void includeSample( IndexEntryUpdate<?> update )
{
selector.select( instances, update.values() ).includeSample( update );
}
@Override
public IndexSample sampleResult()
{
return combineSamples( instancesAs( IndexSample.class, IndexPopulator::sampleResult ) );
}
}