TraceDatabase.java

//----------------------------------------------------------------------------
// Copyright (C) 2011  Ingrid Nunes
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library 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
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
// 
// To contact the authors:
// http://inf.ufrgs.br/prosoft/bdi4jade/
//
//----------------------------------------------------------------------------

package bdi4jade.examples.interactionprotocol;

import com.mongodb.MongoClient;

/**
 * @author jgfaccin
 *
 */
public class TraceDatabase implements AutoCloseable {

	private static MongoClient instance = null;

	private TraceDatabase() {}

	public static MongoClient getInstance() {
		if (instance == null)
			synchronized(TraceDatabase.class) {
				if (instance == null) {
					instance = new MongoClient("localhost");
				}
			}

		return instance;
	}

	/* (non-Javadoc)
	 * @see java.lang.AutoCloseable#close()
	 */
	@Override
	public void close() throws Exception {
		instance.close();		
	}
}