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This component provides management functionality and product surface for Neo4j instances.

There is a newer version: 5.23.0

/*
 * Copyright (c) 2002-2018 "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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.commandline.dbms;

import java.io.File;
import java.io.IOException;

import org.neo4j.commandline.admin.IncorrectUsage;
import org.neo4j.commandline.admin.OutsideWorld;
import org.neo4j.helpers.Args;
import org.neo4j.io.fs.FileUtils;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.util.Converters;
import org.neo4j.kernel.impl.util.Validators;

import static org.neo4j.dbms.DatabaseManagementSystemSettings.database_path;

class DatabaseImporter implements Importer
{
    public static String arguments()
    {
        return "[--from=]";
    }

    public static String description()
    {
        return "--mode=database\n" +
                "        Import a database from a pre-3.0 Neo4j installation.\n" +
                "--from=\n" +
                "         is the location of the pre-3.0 database\n" +
                "        (e.g. /data/graph.db).\n";
    }

    private final File from;
    private final Config config;

    DatabaseImporter( Args args, Config config, OutsideWorld outsideWorld ) throws IncorrectUsage
    {
        this.config = config;

        try
        {
            this.from = args.interpretOption( "from", Converters.mandatory(), Converters.toFile(),
                    Validators.CONTAINS_EXISTING_DATABASE );
        }
        catch ( IllegalArgumentException e )
        {
            throw new IncorrectUsage( e.getMessage() );
        }
    }

    @Override
    public void doImport() throws IOException
    {
        copyDatabase( from, config );
        removeMessagesLog( config );
    }

    private void copyDatabase( File from, Config config ) throws IOException
    {
        FileUtils.copyRecursively( from, config.get( database_path ) );
    }

    private void removeMessagesLog( Config config )
    {
        FileUtils.deleteFile( new File( config.get( database_path ), "messages.log" ) );
    }
}