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LuceneIndexProvider.java
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LuceneIndexProvider.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.api.impl.schema;
import java.io.File;
import java.io.IOException;
import org.neo4j.internal.kernel.api.IndexCapability;
import org.neo4j.internal.kernel.api.InternalIndexState;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.api.impl.index.IndexWriterConfigs;
import org.neo4j.kernel.api.impl.index.storage.DirectoryFactory;
import org.neo4j.kernel.api.impl.index.storage.IndexStorageFactory;
import org.neo4j.kernel.api.impl.index.storage.PartitionedIndexStorage;
import org.neo4j.kernel.api.impl.schema.populator.NonUniqueLuceneIndexPopulator;
import org.neo4j.kernel.api.impl.schema.populator.UniqueLuceneIndexPopulator;
import org.neo4j.kernel.api.index.IndexAccessor;
import org.neo4j.kernel.api.index.IndexDirectoryStructure;
import org.neo4j.kernel.api.index.IndexPopulator;
import org.neo4j.kernel.api.index.IndexProvider;
import org.neo4j.kernel.api.schema.index.IndexDescriptor;
import org.neo4j.kernel.api.schema.index.StoreIndexDescriptor;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.factory.OperationalMode;
import org.neo4j.kernel.impl.storemigration.StoreMigrationParticipant;
import org.neo4j.kernel.impl.storemigration.participant.SchemaIndexMigrator;
import static org.neo4j.kernel.api.schema.index.IndexDescriptor.Type.UNIQUE;
public class LuceneIndexProvider extends IndexProvider
{
private final IndexStorageFactory indexStorageFactory;
private final Config config;
private final OperationalMode operationalMode;
private final FileSystemAbstraction fileSystem;
private final Monitor monitor;
public LuceneIndexProvider( FileSystemAbstraction fileSystem, DirectoryFactory directoryFactory,
IndexDirectoryStructure.Factory directoryStructureFactory, Monitor monitor, Config config,
OperationalMode operationalMode )
{
super( LuceneIndexProviderFactory.PROVIDER_DESCRIPTOR, 0, directoryStructureFactory );
this.monitor = monitor;
this.indexStorageFactory = buildIndexStorageFactory( fileSystem, directoryFactory );
this.fileSystem = fileSystem;
this.config = config;
this.operationalMode = operationalMode;
}
public static IndexDirectoryStructure.Factory defaultDirectoryStructure( File storeDir )
{
return IndexDirectoryStructure.directoriesByProviderKey( storeDir );
}
/**
* Visible <b>only</b> for testing.
*/
protected IndexStorageFactory buildIndexStorageFactory( FileSystemAbstraction fileSystem, DirectoryFactory directoryFactory )
{
return new IndexStorageFactory( directoryFactory, fileSystem, directoryStructure() );
}
@Override
public IndexPopulator getPopulator( StoreIndexDescriptor descriptor, IndexSamplingConfig samplingConfig )
{
SchemaIndex luceneIndex = LuceneSchemaIndexBuilder.create( descriptor, config )
.withFileSystem( fileSystem )
.withOperationalMode( operationalMode )
.withSamplingConfig( samplingConfig )
.withIndexStorage( getIndexStorage( descriptor.getId() ) )
.withWriterConfig( IndexWriterConfigs::population )
.build();
if ( luceneIndex.isReadOnly() )
{
throw new UnsupportedOperationException( "Can't create populator for read only index" );
}
if ( descriptor.type() == UNIQUE )
{
return new UniqueLuceneIndexPopulator( luceneIndex, descriptor );
}
else
{
return new NonUniqueLuceneIndexPopulator( luceneIndex, samplingConfig );
}
}
@Override
public IndexAccessor getOnlineAccessor( StoreIndexDescriptor descriptor, IndexSamplingConfig samplingConfig ) throws IOException
{
SchemaIndex luceneIndex = LuceneSchemaIndexBuilder.create( descriptor, config )
.withOperationalMode( operationalMode )
.withSamplingConfig( samplingConfig )
.withIndexStorage( getIndexStorage( descriptor.getId() ) )
.build();
luceneIndex.open();
return new LuceneIndexAccessor( luceneIndex, descriptor );
}
@Override
public InternalIndexState getInitialState( StoreIndexDescriptor descriptor )
{
PartitionedIndexStorage indexStorage = getIndexStorage( descriptor.getId() );
String failure = indexStorage.getStoredIndexFailure();
if ( failure != null )
{
return InternalIndexState.FAILED;
}
try
{
return indexIsOnline( indexStorage, descriptor ) ? InternalIndexState.ONLINE : InternalIndexState.POPULATING;
}
catch ( IOException e )
{
monitor.failedToOpenIndex( descriptor, "Requesting re-population.", e );
return InternalIndexState.POPULATING;
}
}
@Override
public IndexCapability getCapability()
{
return IndexCapability.NO_CAPABILITY;
}
@Override
public StoreMigrationParticipant storeMigrationParticipant( final FileSystemAbstraction fs, PageCache pageCache )
{
return new SchemaIndexMigrator( fs, this );
}
@Override
public String getPopulationFailure( StoreIndexDescriptor descriptor ) throws IllegalStateException
{
String failure = getIndexStorage( descriptor.getId() ).getStoredIndexFailure();
if ( failure == null )
{
throw new IllegalStateException( "Index " + descriptor.getId() + " isn't failed" );
}
return failure;
}
private PartitionedIndexStorage getIndexStorage( long indexId )
{
return indexStorageFactory.indexStorageOf( indexId );
}
private boolean indexIsOnline( PartitionedIndexStorage indexStorage, IndexDescriptor descriptor ) throws IOException
{
try ( SchemaIndex index = LuceneSchemaIndexBuilder.create( descriptor, config ).withIndexStorage( indexStorage ).build() )
{
if ( index.exists() )
{
index.open();
return index.isOnline();
}
return false;
}
}
}