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// $Id$
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/**
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* Copyright (C) 2015 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package org.bgbm.biovel.drf.store;
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import java.io.File;
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import org.openrdf.repository.sail.SailRepository;
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import org.openrdf.sail.Sail;
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import org.openrdf.sail.SailException;
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import com.tinkerpop.blueprints.Graph;
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import com.tinkerpop.blueprints.impls.neo4j.Neo4jGraph;
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import com.tinkerpop.blueprints.oupls.sail.GraphSail;
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import com.tinkerpop.blueprints.oupls.sail.SailLoader;
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import com.tinkerpop.gremlin.java.GremlinPipeline;
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/**
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* @author a.kohlbecker
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* @date Oct 19, 2015
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*
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*/
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public class Neo4jStore extends Store{
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private Neo4jGraph graph;
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private Sail sail;
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private SailRepository sailRepo;
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/**
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* @throws Exception
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*/
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public Neo4jStore() throws Exception {
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super();
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}
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/**
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* {@inheritDoc}
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* @throws SailException
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*/
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@Override
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protected void initStoreEngine() throws Exception {
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graph = new Neo4jGraph(storeLocation.toString());
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sail = new GraphSail<Neo4jGraph>(graph);
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sail.initialize();
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sailRepo = new SailRepository(sail);
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// logger.info("Using Neo4jGraph store at " + storeLocation.toString());
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// logger.info("Neo4jGraph has " + sizeInfo());
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected void stopStoreEngine() throws Exception {
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sailRepo.shutDown();
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sail.shutDown(); // should be none by the above command already
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}
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/**
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* @throws Exception
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*
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*/
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@Override
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protected void load(File rdfFile) throws Exception {
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SailLoader loader = new SailLoader(sail);
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// loader.setBufferSize(100000); // TODO optimize?
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logger.info("loading RDF/XML into Neo4jGraph store");
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loader.load(rdfFile);
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logger.info("loading RDF/XML done");
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logger.info("Neo4jGraph has " + sizeInfo());
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logger.info("rdf loaded into Neo4jGraph store at " + storeLocation);
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}
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private long countEdges() {
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GremlinPipeline<Neo4jGraph, Object> pipe = new GremlinPipeline<Neo4jGraph, Object>();
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return pipe.start(graph).E().count();
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}
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private long countVertexes() {
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GremlinPipeline<Neo4jGraph, Object> pipe = new GremlinPipeline<Neo4jGraph, Object>();
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return pipe.start(graph).V().count();
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}
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public String sizeInfo() {
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return countEdges() + " edges, " + countVertexes() + " vertexes";
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected String storeName() {
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return "neo4j";
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}
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public Graph graph() {
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return graph;
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}
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/**
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* @return the sailRepo
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*/
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public SailRepository getSailRepo() {
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return sailRepo;
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}
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}
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