hu.bme.mit.trainbenchmark.benchmark.blazegraph.driver.BlazegraphDriver.java Source code

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Here is the source code for hu.bme.mit.trainbenchmark.benchmark.blazegraph.driver.BlazegraphDriver.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.blazegraph.driver;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;

import org.apache.commons.io.FileUtils;
import org.openrdf.repository.RepositoryException;

import com.bigdata.rdf.sail.BigdataSail;
import com.bigdata.rdf.sail.BigdataSailRepository;

import hu.bme.mit.trainbenchmark.benchmark.sesame.driver.SesameDriver;

public class BlazegraphDriver extends SesameDriver {

    protected final BigdataSail sail;

    public BlazegraphDriver(final boolean inferencing) throws IOException, RepositoryException {
        super(inferencing);

        // remove Blazegraph banner text
        System.getProperties().setProperty("com.bigdata.Banner.quiet", "true");
        System.getProperties().setProperty("com.bigdata.util.config.LogUtil.quiet", "true");

        // load journal properties from resources
        final Properties props = loadProperties("/blazegraph.properties");
        // instantiate a sail
        final String journalFile = (String) props.get("com.bigdata.journal.AbstractJournal.file");
        FileUtils.deleteQuietly(new File(journalFile));

        sail = new BigdataSail(props);
        repository = new BigdataSailRepository(sail);
        repository.initialize();
    }

    @Override
    public void beginTransaction() {
        vf = sail.getValueFactory();
    }

    @Override
    public void destroy() throws Exception {
        super.destroy();
        repository.shutDown();
    }

    public Properties loadProperties(final String resource) throws IOException {
        final Properties p = new Properties();
        final InputStream is = this.getClass().getResourceAsStream(resource);
        p.load(new InputStreamReader(new BufferedInputStream(is)));
        return p;
    }

}