OrientDB Blueprints Graph Export

package org.example.graph.orientdb;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;

import org.apache.log4j.Logger;

import com.orientechnologies.orient.core.command.OCommandOutputListener;
import com.orientechnologies.orient.core.db.record.ODatabaseRecord;
import com.orientechnologies.orient.core.db.tool.ODatabaseExport;
import com.tinkerpop.blueprints.pgm.impls.orientdb.OrientGraph;

/**
 * @author Salvatore Piccione
 *
 */
public class GraphDatabaseExporter {

    protected static final Logger LOGGER = Logger.getLogger(GraphDatabaseExporter.class);

    private static final String DATABASE_URL = "remote:orientdb-host/tinkerpop";

    private static final String USERNAME = "admin";

    private static final String PASSWORD = "admin";

    /**
     * @param args
     */
    public static void main(String[] args) {
        final URI fileURI = new File("C:\\path\\to\\export\\dir\\exp_db.json").toURI();
        //check the parameters
        if (fileURI == null) {
            IllegalArgumentException topicNullExcep = new IllegalArgumentException(
                "The URI of the file exporting the database '" + DATABASE_URL +
                "' to cannot be null.");
            LOGGER.error(topicNullExcep.getMessage(),topicNullExcep);
            throw topicNullExcep;
        }

        File file = new File (fileURI);
        OutputStream fileStream = null;
        try {
            fileStream = new BufferedOutputStream(new FileOutputStream(file));
        } catch (FileNotFoundException e) {
            LOGGER.error("Error in opening the file " + fileURI.toString() + "(database export)", e);
            System.exit(1);
        }
        OrientGraph graph = new OrientGraph(
                DATABASE_URL, USERNAME,PASSWORD);
        ODatabaseExport exportManager = null;
        ODatabaseRecord database = null;
        try {
            database = graph.getRawGraph();
            exportManager = new ODatabaseExport(database ,fileStream,new OCommandOutputListener () {
                public void onMessage(String iText) {
                    LOGGER.debug("Exporting database " + DATABASE_URL +
                        " to " + fileURI.toString() + " - " + iText);
                }
            });

            exportManager.exportDatabase();
            /*
            exportManager.exportRecords();*/
            exportManager.close();
            database.close();
        } catch (IOException e) {
            LOGGER.error("Exception during the export of the database " + DATABASE_URL
                + " to the file " + fileURI.toString(), e);
            if (exportManager != null)
                exportManager.close();
            if (database != null)
                database.close();
            System.exit(1);
        }
    }

}