S2SRandomSelector.java

/*
* Tigase Jabber/XMPP Server
* Copyright (C) 2004-2012 "Artur Hefczyc" <artur.hefczyc@tigase.org>
*
* This program 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, version 3 of the License.
*
* 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. Look for COPYING file in the top folder.
* If not, see http://www.gnu.org/licenses/.
*
* $Rev$
* Last modified by $Author$
* $Date$
 */
package tigase.server.xmppserver;

//~--- non-JDK imports --------------------------------------------------------

import tigase.server.Packet;

//~--- JDK imports ------------------------------------------------------------

import java.util.List;
import java.util.Random;
import java.util.Set;
import java.util.logging.Logger;

//~--- classes ----------------------------------------------------------------

/**
 * Created: Jun 26, 2010 9:40:04 AM
 *
 * @author <a href="mailto:artur.hefczyc@tigase.org">Artur Hefczyc</a>
 * @version $Rev$
 */
public class S2SRandomSelector implements S2SConnectionSelector {
	private static final Logger log = Logger.getLogger(S2SRandomSelector.class.getName());

	//~--- fields ---------------------------------------------------------------

	private Random rand = new Random();

	//~--- methods --------------------------------------------------------------

	/**
	 * Method description
	 *
	 *
	 * @param packet
	 * @param outgoing
	 *
	 * @return
	 */
	@Override
	public S2SConnection selectConnection(Packet packet, Set<S2SConnection> outgoing) {
		int size = outgoing.size();

		if (size == 0) {
			return null;
		}

		int pos = rand.nextInt(size);
		S2SConnection result = null;
		int i = -1;

		for (S2SConnection s2SConnection : outgoing) {
			if (++i == pos) {
				result = s2SConnection;

				break;
			}
		}

		return result;
	}
}


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