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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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 distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.plugins;
import java.util.Collection;
import java.util.Collections;
import org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
/**
* An extension point for {@link Plugin} implementations to customer behavior of cluster management.
*/
public interface ClusterPlugin {
/**
* Return deciders used to customize where shards are allocated.
*
* @param settings Settings for the node
* @param clusterSettings Settings for the cluster
* @return Custom {@link AllocationDecider} instances
*/
default Collection<AllocationDecider> createAllocationDeciders(Settings settings, ClusterSettings clusterSettings) {
return Collections.emptyList();
}
}
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