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BloomKernelExtension.java
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BloomKernelExtension.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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.api.impl.fulltext.integrations.bloom;
import org.apache.lucene.analysis.Analyzer;
import java.io.File;
import java.io.IOException;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.kernel.api.exceptions.ProcedureException;
import org.neo4j.kernel.api.impl.fulltext.FulltextFactory;
import org.neo4j.kernel.api.impl.fulltext.FulltextProvider;
import org.neo4j.kernel.api.impl.fulltext.LuceneFulltext;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.proc.Procedures;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
public class BloomKernelExtension extends LifecycleAdapter
{
private final File storeDir;
private final Config config;
private final FileSystemAbstraction fileSystemAbstraction;
private final GraphDatabaseService db;
private final Procedures procedures;
private FulltextFactory fulltextFactory;
public BloomKernelExtension( FileSystemAbstraction fileSystemAbstraction, File storeDir, Config config, GraphDatabaseService db, Procedures procedures )
{
this.storeDir = storeDir;
this.config = config;
this.fileSystemAbstraction = fileSystemAbstraction;
this.db = db;
this.procedures = procedures;
}
@Override
public void init() throws IOException, ProcedureException
{
String[] properties = config.get( LoadableBloomFulltextConfig.bloom_indexed_properties ).toArray( new String[0] );
Analyzer analyzer;
try
{
Class configuredAnalayzer = Class.forName( config.get( LoadableBloomFulltextConfig.bloom_analyzer ) );
analyzer = (Analyzer) configuredAnalayzer.newInstance();
}
catch ( Exception e )
{
throw new RuntimeException( "Could not create the configured analyzer", e );
}
FulltextProvider provider = FulltextProvider.instance( db );
fulltextFactory = new FulltextFactory( fileSystemAbstraction, storeDir, analyzer );
LuceneFulltext nodes = fulltextFactory.createFulltextHelper( "bloomNodes", FulltextFactory.FULLTEXT_HELPER_TYPE.NODES, properties );
LuceneFulltext relationships =
fulltextFactory.createFulltextHelper( "bloomRelationships", FulltextFactory.FULLTEXT_HELPER_TYPE.RELATIONSHIPS, properties );
provider.register( nodes );
provider.register( relationships );
procedures.register( new BloomProcedure( "Nodes", nodes ) );
procedures.register( new BloomProcedure( "Relationships", relationships ) );
}
@Override
public void shutdown() throws Exception
{
FulltextProvider.instance( db ).close();
}
}