/**
 * Copyright (c) 2002-2011 "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.kernel.ha;

import javax.transaction.TransactionManager;

import org.neo4j.kernel.impl.transaction.xaframework.TxIdGenerator;
import org.neo4j.kernel.impl.transaction.xaframework.TxIdGeneratorFactory;
import org.neo4j.kernel.impl.transaction.xaframework.XaDataSource;

public class MasterTxIdGenerator implements TxIdGenerator
{
    public static class MasterTxIdGeneratorFactory implements TxIdGeneratorFactory
    {
        private final Broker broker;

        public MasterTxIdGeneratorFactory( Broker broker )
        {
            this.broker = broker;
        }
        
        public TxIdGenerator create( TransactionManager txManager )
        {
            return new MasterTxIdGenerator( broker );
        }
    }
    
    private final Broker broker;

    public MasterTxIdGenerator( Broker broker )
    {
        this.broker = broker;
    }
    
    public long generate( XaDataSource dataSource, int identifier )
    {
        return TxIdGenerator.DEFAULT.generate( dataSource, identifier );
    }

    public int getCurrentMasterId()
    {
        return broker.getMyMachineId();
    }
}