org.elasticsearch.index.shard.IndexShardModule Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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* 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,
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package org.elasticsearch.index.shard;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.common.Classes;
import org.elasticsearch.common.inject.AbstractModule;
import org.elasticsearch.common.inject.multibindings.Multibinder;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.cache.query.index.IndexQueryCache;
import org.elasticsearch.index.engine.IndexSearcherWrapper;
import org.elasticsearch.index.engine.IndexSearcherWrappingService;
import org.elasticsearch.index.engine.EngineFactory;
import org.elasticsearch.index.engine.InternalEngineFactory;
import org.elasticsearch.index.percolator.stats.ShardPercolateService;
import org.elasticsearch.index.termvectors.ShardTermVectorsService;
import org.elasticsearch.index.translog.TranslogService;
/**
* The {@code IndexShardModule} module is responsible for binding the correct
* shard id, index shard, engine factory, and warming service for a newly
* created shard.
*/
public class IndexShardModule extends AbstractModule {
private final ShardId shardId;
private final Settings settings;
private final boolean primary;
// pkg private so tests can mock
Class engineFactoryImpl = InternalEngineFactory.class;
public IndexShardModule(ShardId shardId, boolean primary, Settings settings) {
this.settings = settings;
this.shardId = shardId;
this.primary = primary;
if (settings.get("index.translog.type") != null) {
throw new IllegalStateException("a custom translog type is no longer supported. got [" + settings.get("index.translog.type") + "]");
}
}
/** Return true if a shadow engine should be used */
protected boolean useShadowEngine() {
return primary == false && IndexMetaData.isIndexUsingShadowReplicas(settings);
}
@Override
protected void configure() {
bind(ShardId.class).toInstance(shardId);
if (useShadowEngine()) {
bind(IndexShard.class).to(ShadowIndexShard.class).asEagerSingleton();
} else {
bind(IndexShard.class).asEagerSingleton();
bind(TranslogService.class).asEagerSingleton();
}
bind(EngineFactory.class).to(engineFactoryImpl);
bind(StoreRecoveryService.class).asEagerSingleton();
bind(ShardPercolateService.class).asEagerSingleton();
bind(ShardTermVectorsService.class).asEagerSingleton();
bind(IndexSearcherWrappingService.class).asEagerSingleton();
// this injects an empty set in IndexSearcherWrappingService, otherwise guice can't construct IndexSearcherWrappingService
Multibinder multibinder
= Multibinder.newSetBinder(binder(), IndexSearcherWrapper.class);
}
}