org.neo4j.cluster.protocol.election.Election Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of neo4j-cluster Show documentation

Library implementing Paxos and Heartbeat components required for High Availability Neo4j

There is a newer version: 3.5.0-beta03

/*
 * Copyright (c) 2002-2016 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see .
 */
package org.neo4j.cluster.protocol.election;

import org.neo4j.cluster.InstanceId;

/**
 * Election API.
 *
 * @see ElectionState
 * @see ElectionMessage
 */
public interface Election
{
    void demote( InstanceId node );

    /**
     * Asks an election to be performed for all currently known roles, regardless of someone holding that role
     * currently. It is allowed for the same instance to be reelected.
     */
    void performRoleElections();

    void promote( InstanceId node, String role );
}