org.elasticsearch.cluster.routing.allocation.allocator.ShardsAllocatorModule Maven / Gradle / Ivy
/*
* 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.cluster.routing.allocation.allocator;
import org.elasticsearch.common.inject.AbstractModule;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.gateway.none.NoneGatewayAllocator;
/**
*/
public class ShardsAllocatorModule extends AbstractModule {
public static final String EVEN_SHARD_COUNT_ALLOCATOR_KEY = "even_shard";
public static final String BALANCED_ALLOCATOR_KEY = "balanced"; // default
public static final String TYPE_KEY = "cluster.routing.allocation.type";
private Settings settings;
private Class shardsAllocator;
private Class gatewayAllocator = NoneGatewayAllocator.class;
public ShardsAllocatorModule(Settings settings) {
this.settings = settings;
shardsAllocator = loadShardsAllocator(settings);
}
public void setGatewayAllocator(Class gatewayAllocator) {
this.gatewayAllocator = gatewayAllocator;
}
public void setShardsAllocator(Class shardsAllocator) {
this.shardsAllocator = shardsAllocator;
}
@Override
protected void configure() {
if (shardsAllocator == null) {
shardsAllocator = loadShardsAllocator(settings);
}
bind(GatewayAllocator.class).to(gatewayAllocator).asEagerSingleton();
bind(ShardsAllocator.class).to(shardsAllocator).asEagerSingleton();
}
private Class loadShardsAllocator(Settings settings) {
final Class shardsAllocator;
final String type = settings.get(TYPE_KEY, BALANCED_ALLOCATOR_KEY);
if (BALANCED_ALLOCATOR_KEY.equals(type)) {
shardsAllocator = BalancedShardsAllocator.class;
} else if (EVEN_SHARD_COUNT_ALLOCATOR_KEY.equals(type)) {
shardsAllocator = EvenShardsCountAllocator.class;
} else {
shardsAllocator = settings.getAsClass(TYPE_KEY, BalancedShardsAllocator.class,
"org.elasticsearch.cluster.routing.allocation.allocator.", "Allocator");
}
return shardsAllocator;
}
}