org.apache.activemq.artemis.core.server.cluster.qourum.Quorum Maven / Gradle / Ivy
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* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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package org.apache.activemq.artemis.core.server.cluster.qourum;
import org.apache.activemq.artemis.core.client.impl.Topology;
/**
* A quorum can be registered with the {@link QuorumManager} to receive notifications about the state of a cluster.
* It can then use the {@link QuorumManager} for the quorum within a cluster to vote on a specific outcome.
*/
public interface Quorum {
/**
* the name of the Quorum. this should be unique and is used to locate the correct quorum to use for voting
*/
String getName();
/**
* called by the quorum manager when a quorum is registered
*/
void setQuorumManager(QuorumManager quorumManager);
/**
* called by the quorum when a node in the quorum goes down
*/
void nodeDown(Topology topology, long eventUID, String nodeID);
/**
* called by the quorum when a node in the quorum goes up
*/
void nodeUp(Topology topology);
/**
* called if the quorum manager is stopping so we can clean up
*/
void close();
}