XidFactory.java

/**
 *  OpenKM, Open Document Management System (http://www.openkm.com)
 *  Copyright (c) 2006-2011  Paco Avila & Josep Llort
 *
 *  No bytes were intentionally harmed during the development of this application.
 *
 *  This program 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 2 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, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.openkm.util;

import java.nio.ByteBuffer;

import javax.transaction.xa.Xid;

public class XidFactory {
	private static final int FORMAT_ID = 0x4f4b4d; // OKM
	private static int count = 0;
	
	private XidFactory() {}
	
	public static synchronized Xid createXid() {
		return new Xid() {
			public int getFormatId() {
	            return FORMAT_ID;
	        }
			
			public byte[] getGlobalTransactionId() {
				byte[] gti = new byte[64];
		        ByteBuffer bb = ByteBuffer.wrap(gti);
		        bb.putLong(Thread.currentThread().getId());
		        bb.putLong(System.currentTimeMillis());
		        bb.putLong(count++);
		        return gti;
	        }
			
			public byte[] getBranchQualifier() {
				byte[] bq = new byte[64];
		        ByteBuffer bb = ByteBuffer.wrap(bq);
		        bb.putLong(Thread.currentThread().getId());
		        bb.putLong(System.currentTimeMillis());
		        bb.putInt(count++);
	            return bq;
	        }
	    };
	}
}