hu.bme.mit.trainbenchmark.benchmark.orientdb.driver.OrientDbDriver.java Source code

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Here is the source code for hu.bme.mit.trainbenchmark.benchmark.orientdb.driver.OrientDbDriver.java

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/*******************************************************************************
 * Copyright (c) 2010-2015, Benedek Izso, Gabor Szarnyas, Istvan Rath and Daniel Varro
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Benedek Izso - initial API and implementation
 *   Gabor Szarnyas - initial API and implementation
 *******************************************************************************/
package hu.bme.mit.trainbenchmark.benchmark.orientdb.driver;

import hu.bme.mit.trainbenchmark.benchmark.driver.Driver;
import hu.bme.mit.trainbenchmark.constants.Query;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;

import org.apache.commons.io.FileUtils;

import com.google.common.collect.Lists;
import com.orientechnologies.common.log.OLogManager;
import com.orientechnologies.orient.core.exception.OConcurrentModificationException;
import com.orientechnologies.orient.graph.gremlin.OCommandGremlin;
import com.orientechnologies.orient.graph.gremlin.OGremlinHelper;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.blueprints.impls.orient.OrientGraph;
import com.tinkerpop.blueprints.util.io.graphml.GraphMLReader;
import com.tinkerpop.pipes.util.structures.Row;

public class OrientDbDriver extends Driver<Vertex> {

    protected OrientGraph graphDb;
    protected String dbPath;
    protected String benchmarkDir;
    protected Comparator<Vertex> vertexComparator = new VertexComparator();

    public OrientDbDriver(final String dbPath, final String benchmarkDir) throws IOException {
        // delete old directory
        if (new File(dbPath).exists()) {
            FileUtils.deleteDirectory(new File(dbPath));
        }

        // start the database
        this.dbPath = dbPath;
        this.benchmarkDir = benchmarkDir;
    }

    @Override
    public void beginTransaction() {
        graphDb.begin();
    }

    @Override
    public void finishTransaction() {
        for (int retry = 0; retry < 10; ++retry) {
            try {
                graphDb.commit();
                break;
            } catch (final OConcurrentModificationException e) {
            }
        }
    }

    @Override
    public void read(final String filePath) throws IOException {
        OLogManager.instance().setWarnEnabled(false);
        OLogManager.instance().setInfoEnabled(false);
        OLogManager.instance().setDebugEnabled(false);
        graphDb = new OrientGraph("plocal:" + dbPath);
        final GraphMLReader graphMLReader = new GraphMLReader(graphDb);
        graphMLReader.inputGraph(filePath + ".graphml", 100);
    }

    public List<Row> runQuery(final List<String> lines) throws IOException {
        OGremlinHelper.global().create();
        final OCommandGremlin gremcomm = new OCommandGremlin();
        List<Row> result = new ArrayList<Row>();
        for (final String line : lines) {
            if (lines.indexOf(line) != lines.size() - 1) {
                gremcomm.setText(line).execute();
            } else {
                result = gremcomm.setText(line).execute();
            }
        }
        return result;
    }

    @Override
    public Collection<?> runQuery(final Query query, final String queryDefinition) throws IOException {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void destroy() {
        graphDb.drop();
    }

    public String typeTranslator(final String type) {
        String result;
        switch (type) {
        case "Segment":
            result = ":TrackElement:Segment";
            break;
        case "Signal":
            result = ":Signal";
            break;
        case "Sensor":
            result = ":Sensor";
            break;
        case "Switch":
            result = ":Switch:TrackElement";
            break;
        case "Route":
            result = ":Route";
            break;
        case "SwitchPosition":
            result = ":SwitchPosition";
            break;
        default:
            result = type;
            break;
        }
        return result;
    }

    // read

    @Override
    public List<Vertex> collectVertices(final String type) {
        final Iterable<Vertex> vertices = graphDb.getVertices("labels", typeTranslator(type));
        final List<Vertex> list = Lists.newArrayList(vertices);
        return list;
    }

    // utility

    public OrientGraph getGraphDb() {
        return graphDb;
    }

    @Override
    public Comparator<Vertex> getElementComparator() {
        return vertexComparator;
    }

    @Override
    public String getExtension() {
        return ".graphml";
    }

    public String getBenchmarkDir() {
        return benchmarkDir;
    }

}