org.neo4j.cluster.util.Quorums Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ongdb-cluster Show documentation

Library implementing Paxos and Heartbeat components required for High Availability Neo4j

The newest version!

/*
 * Copyright (c) 2018-2020 "Graph Foundation"
 * Graph Foundation, Inc. [https://graphfoundation.org]
 *
 * Copyright (c) 2002-2018 "Neo4j,"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of ONgDB Enterprise Edition. The included source
 * code can be redistributed and/or modified under the terms of the
 * GNU AFFERO GENERAL PUBLIC LICENSE Version 3
 * (http://www.fsf.org/licensing/licenses/agpl-3.0.html) as found
 * in the associated LICENSE.txt file.
 *
 * 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.
 */
package org.neo4j.cluster.util;

public class Quorums
{
    private Quorums()
    {
    }

    /** Determines if a number of available members qualify as a majority, given the total number of members. */
    public static boolean isQuorum( long availableMembers, long totalMembers )
    {
        return availableMembers >= Math.floor( (totalMembers / 2) + 1 );
    }
}