/**
 * Copyright (c) 2002-2010 "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 Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package org.neo4j.onlinebackup;

import static org.junit.Assert.assertNotNull;

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

import org.junit.Before;
import org.junit.Test;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Transaction;
import org.neo4j.index.IndexService;
import org.neo4j.index.lucene.LuceneIndexService;
import org.neo4j.kernel.EmbeddedGraphDatabase;
import org.neo4j.kernel.impl.transaction.XaDataSourceManager;
import org.neo4j.kernel.impl.transaction.xaframework.XaDataSource;

/**
 * Try to backup Neo to another running Neo instance.
 */
public class TestApplyNewLogs
{
    private static final String FILE_SEP = System.getProperty( "file.separator" );
    private static final String TARGET_DIR = "target";
    private static final String VAR = TARGET_DIR + FILE_SEP + "var";
    private static final String STORE_LOCATION_DIR = VAR + FILE_SEP + "neo-db";
    private static final String BACKUP_LOCATION_DIR = VAR + FILE_SEP
                                                      + "neo-backup";

    @Before
    public void clean() throws IOException
    {
        Util.deleteDir( new File( VAR ) );

        System.out.println( "setting up simple database and backup-copy" );

        EmbeddedGraphDatabase graphDb = new EmbeddedGraphDatabase(
                STORE_LOCATION_DIR );
        graphDb.shutdown();
        Util.copyDir( STORE_LOCATION_DIR, BACKUP_LOCATION_DIR );
        graphDb = new EmbeddedGraphDatabase( STORE_LOCATION_DIR );
        IndexService index = new LuceneIndexService( graphDb );
        XaDataSourceManager xaDsMgr = graphDb.getConfig().getTxModule().getXaDataSourceManager();
        for ( XaDataSource xaDs : xaDsMgr.getAllRegisteredDataSources() )
        {
            xaDs.keepLogicalLogs( true );
        }
        Transaction tx = graphDb.beginTx();
        try
        {
            Node node1 = graphDb.createNode();
            index.index( node1, "backup_test", "1" );
            tx.success();
        }
        finally
        {
            tx.finish();
        }
        for ( XaDataSource xaDs : xaDsMgr.getAllRegisteredDataSources() )
        {
            xaDs.rotateLogicalLog();
        }
        tx = graphDb.beginTx();
        try
        {
            Node node2 = graphDb.createNode();
            index.index( node2, "backup_test", "2" );
            tx.success();
        }
        finally
        {
            tx.finish();
        }
        index.shutdown();
        graphDb.shutdown();

        Util.copyLogs( STORE_LOCATION_DIR, BACKUP_LOCATION_DIR );
    }

    @Test
    public void backup() throws IOException
    {
        String dest = "target/var/neo-backup";
        ApplyNewLogs.main( new String[] { dest } );
        GraphDatabaseService graphDb = new EmbeddedGraphDatabase( dest );
        IndexService index = new LuceneIndexService( graphDb );
        Transaction tx = graphDb.beginTx();
        try
        {
            assertNotNull( index.getSingleNode( "backup_test", "1" ) );
            assertNotNull( index.getSingleNode( "backup_test", "2" ) );
        }
        finally
        {
            tx.finish();
        }
        index.shutdown();
        graphDb.shutdown();
    }
}