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LuceneLabelScanStoreBuilder.java
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LuceneLabelScanStoreBuilder.java
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/*
* Copyright (c) 2002-2017 "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.index.lucene;
import java.io.File;
import java.io.IOException;
import java.util.function.Supplier;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.kernel.api.impl.labelscan.LabelScanIndex;
import org.neo4j.kernel.api.impl.labelscan.LuceneLabelScanIndexBuilder;
import org.neo4j.kernel.api.impl.labelscan.LuceneLabelScanStore;
import org.neo4j.kernel.api.labelscan.LabelScanStore;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.factory.OperationalMode;
import org.neo4j.kernel.impl.api.index.IndexStoreView;
import org.neo4j.kernel.impl.api.scan.FullLabelStream;
import org.neo4j.logging.LogProvider;
import static org.neo4j.kernel.impl.api.scan.LabelScanStoreProvider.getStoreDirectory;
/**
* Means of obtaining a {@link LabelScanStore}, independent of the {@link org.neo4j.kernel.extension.KernelExtensions}
* mechanism, when you need to access the store without running a full database. This is used during consistency
* checking.
*
* Duplicate functionality from {@link LuceneKernelExtensionFactory}, {@link LuceneKernelExtension}
*/
public class LuceneLabelScanStoreBuilder
{
private final File storeDir;
private final Supplier<IndexStoreView> storeViewSupplier;
private final FileSystemAbstraction fileSystem;
private final Config config;
private final OperationalMode operationalMode;
private final LogProvider logProvider;
private LuceneLabelScanStore labelScanStore;
public LuceneLabelScanStoreBuilder( File storeDir, IndexStoreView storeView,
FileSystemAbstraction fileSystem, Config config, OperationalMode operationalMode, LogProvider logProvider )
{
this (storeDir, () -> storeView, fileSystem, config, operationalMode, logProvider);
}
public LuceneLabelScanStoreBuilder( File storeDir, Supplier<IndexStoreView> storeViewSupplier,
FileSystemAbstraction fileSystem, Config config, OperationalMode operationalMode, LogProvider logProvider )
{
this.storeDir = storeDir;
this.storeViewSupplier = storeViewSupplier;
this.fileSystem = fileSystem;
this.config = config;
this.operationalMode = operationalMode;
this.logProvider = logProvider;
}
public LabelScanStore build()
{
if ( null == labelScanStore )
{
// TODO: Replace with kernel extension based lookup
LabelScanIndex index = LuceneLabelScanIndexBuilder.create()
.withFileSystem( fileSystem )
.withIndexRootFolder( getStoreDirectory( storeDir ) )
.withConfig( config )
.withOperationalMode( operationalMode )
.build();
labelScanStore = new LuceneLabelScanStore( index, new FullLabelStream( storeViewSupplier ),
logProvider, LabelScanStore.Monitor.EMPTY );
try
{
labelScanStore.init();
labelScanStore.start();
}
catch ( IOException e )
{
// Throw better exception
throw new RuntimeException( e );
}
}
return labelScanStore;
}
}