org.elasticsearch.cluster.ClusterStateListener Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.cluster;
import org.elasticsearch.cluster.service.ClusterService;
/**
* A listener to be notified when a cluster state changes. The {@link #clusterChanged} method is called after the cluster state becomes
* visible via {@link ClusterService#state()}. See also {@link ClusterStateApplier}.
*/
public interface ClusterStateListener {
/**
* Called when cluster state changes.
*
* Cluster states are applied one-by-one which means they can be a performance bottleneck. Implementations of this method should
* therefore be fast, so please consider forking work into the background rather than doing everything inline.
*/
void clusterChanged(ClusterChangedEvent event);
}