/*
* JBoss, Home of Professional Open Source.
* Copyright 2015, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.clustering.singleton.election;
import java.util.List;
import java.util.Random;
import org.wildfly.clustering.group.Node;
import org.wildfly.clustering.singleton.SingletonElectionPolicy;
/**
* {@link SingletonElectionPolicy} that elects a random member.
* @author Paul Ferraro
*/
public class RandomSingletonElectionPolicy implements SingletonElectionPolicy {
private final Random random = new Random(System.currentTimeMillis());
/**
* {@inheritDoc}
*/
@Override
public Node elect(List<Node> nodes) {
int size = nodes.size();
return (size > 0) ? nodes.get(this.random.nextInt(size)) : null;
}
}