Added IndexSearcherWrapper extension point.
This extension point allows one IndexSearcherWrapper instance to intercept the searcher from the Engine before it is used for a opertion.
This commit is contained in:
Martijn van Groningen
parent
52113e7527
commit
e997342da4
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@ -20,7 +20,6 @@
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package org.elasticsearch.index.engine;
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import com.google.common.base.Preconditions;
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import org.apache.lucene.index.*;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.Query;
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@ -45,7 +44,6 @@ import org.elasticsearch.common.util.concurrent.ReleasableLock;
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import org.elasticsearch.index.VersionType;
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import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
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import org.elasticsearch.index.deletionpolicy.SnapshotIndexCommit;
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import org.elasticsearch.index.mapper.DocumentMapper;
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import org.elasticsearch.index.mapper.ParseContext.Document;
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import org.elasticsearch.index.mapper.ParsedDocument;
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import org.elasticsearch.index.mapper.Uid;
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@ -57,11 +55,7 @@ import org.elasticsearch.index.translog.Translog;
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import java.io.Closeable;
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import java.io.IOException;
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import java.util.Arrays;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.*;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.locks.Condition;
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@ -288,7 +282,7 @@ public abstract class Engine implements Closeable {
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try {
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final Searcher retVal = newSearcher(source, searcher, manager);
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success = true;
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return retVal;
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return config().getWrappingService().wrap(engineConfig, retVal);
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} finally {
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if (!success) {
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manager.release(searcher);
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@ -22,7 +22,6 @@ import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.codecs.Codec;
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import org.apache.lucene.index.IndexWriterConfig;
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import org.apache.lucene.index.MergePolicy;
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import org.elasticsearch.index.shard.MergeSchedulerConfig;
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import org.apache.lucene.search.QueryCache;
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import org.apache.lucene.search.QueryCachingPolicy;
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import org.apache.lucene.search.similarities.Similarity;
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@ -35,6 +34,7 @@ import org.elasticsearch.common.util.concurrent.EsExecutors;
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import org.elasticsearch.index.codec.CodecService;
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import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
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import org.elasticsearch.index.indexing.ShardIndexingService;
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import org.elasticsearch.index.shard.MergeSchedulerConfig;
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import org.elasticsearch.index.shard.ShardId;
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import org.elasticsearch.index.shard.TranslogRecoveryPerformer;
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import org.elasticsearch.index.store.Store;
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@ -77,6 +77,7 @@ public final class EngineConfig {
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private final boolean forceNewTranslog;
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private final QueryCache queryCache;
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private final QueryCachingPolicy queryCachingPolicy;
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private final IndexSearcherWrappingService wrappingService;
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/**
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* Index setting for index concurrency / number of threadstates in the indexwriter.
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@ -143,7 +144,7 @@ public final class EngineConfig {
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Settings indexSettings, IndicesWarmer warmer, Store store, SnapshotDeletionPolicy deletionPolicy,
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MergePolicy mergePolicy, MergeSchedulerConfig mergeSchedulerConfig, Analyzer analyzer,
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Similarity similarity, CodecService codecService, Engine.FailedEngineListener failedEngineListener,
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TranslogRecoveryPerformer translogRecoveryPerformer, QueryCache queryCache, QueryCachingPolicy queryCachingPolicy, TranslogConfig translogConfig) {
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TranslogRecoveryPerformer translogRecoveryPerformer, QueryCache queryCache, QueryCachingPolicy queryCachingPolicy, IndexSearcherWrappingService wrappingService, TranslogConfig translogConfig) {
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this.shardId = shardId;
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this.indexSettings = indexSettings;
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this.threadPool = threadPool;
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@ -157,6 +158,7 @@ public final class EngineConfig {
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this.similarity = similarity;
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this.codecService = codecService;
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this.failedEngineListener = failedEngineListener;
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this.wrappingService = wrappingService;
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this.optimizeAutoGenerateId = indexSettings.getAsBoolean(EngineConfig.INDEX_OPTIMIZE_AUTOGENERATED_ID_SETTING, false);
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this.compoundOnFlush = indexSettings.getAsBoolean(EngineConfig.INDEX_COMPOUND_ON_FLUSH, compoundOnFlush);
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this.indexConcurrency = indexSettings.getAsInt(EngineConfig.INDEX_CONCURRENCY_SETTING, Math.max(IndexWriterConfig.DEFAULT_MAX_THREAD_STATES, (int) (EsExecutors.boundedNumberOfProcessors(indexSettings) * 0.65)));
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@ -421,6 +423,10 @@ public final class EngineConfig {
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return queryCachingPolicy;
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}
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public IndexSearcherWrappingService getWrappingService() {
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return wrappingService;
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}
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/**
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* Returns the translog config for this engine
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*/
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@ -0,0 +1,45 @@
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/*
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* Licensed to Elasticsearch under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.index.engine;
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import org.apache.lucene.index.DirectoryReader;
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import org.apache.lucene.search.IndexSearcher;
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/**
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* Extension point to add custom functionality at request time to the {@link DirectoryReader}
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* and {@link IndexSearcher} managed by the {@link Engine}.
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*/
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public interface IndexSearcherWrapper {
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/**
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* @param reader The provided directory reader to be wrapped to add custom functionality
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* @return a new directory reader wrapping the provided directory reader or if no wrapping was performed
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* the provided directory reader
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*/
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DirectoryReader wrap(DirectoryReader reader);
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/**
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* @param searcher The provided index searcher to be wrapped to add custom functionality
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* @return a new index searcher wrapping the provided index searcher or if no wrapping was performed
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* the provided index searcher
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*/
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IndexSearcher wrap(IndexSearcher searcher) throws EngineException;
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}
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@ -0,0 +1,94 @@
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/*
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* Licensed to Elasticsearch under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.index.engine;
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import org.apache.lucene.index.DirectoryReader;
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import org.apache.lucene.search.IndexSearcher;
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import org.elasticsearch.ElasticsearchException;
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import org.elasticsearch.common.inject.Inject;
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import org.elasticsearch.index.engine.Engine.Searcher;
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import java.util.Set;
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/**
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* Service responsible for wrapping the {@link DirectoryReader} and {@link IndexSearcher} of a {@link Searcher} via the
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* configured {@link IndexSearcherWrapper} instance. This allows custom functionally to be added the {@link Searcher}
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* before being used to do an operation (search, get, field stats etc.)
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*/
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// TODO: This needs extension point is a bit hacky now, because the IndexSearch from the engine can only be wrapped once,
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// if we allowed the IndexSearcher to be wrapped multiple times then a custom IndexSearcherWrapper needs have good
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// control over its location in the wrapping chain
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public final class IndexSearcherWrappingService {
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private final IndexSearcherWrapper wrapper;
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// for unit tests:
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IndexSearcherWrappingService() {
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this.wrapper = null;
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}
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@Inject
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// Use a Set parameter here, because constructor parameter can't be optional
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// and I prefer to keep the `wrapper` field final.
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public IndexSearcherWrappingService(Set<IndexSearcherWrapper> wrappers) {
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if (wrappers.size() > 1) {
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throw new IllegalStateException("wrapping of the index searcher by more than one wrappers is forbidden, found the following wrappers [" + wrappers + "]");
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}
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if (wrappers.isEmpty()) {
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this.wrapper = null;
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} else {
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this.wrapper = wrappers.iterator().next();
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}
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}
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/**
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* If there are configured {@link IndexSearcherWrapper} instances, the {@link IndexSearcher} of the provided engine searcher
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* gets wrapped and a new {@link Searcher} instances is returned, otherwise the provided {@link Searcher} is returned.
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*
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* This is invoked each time a {@link Searcher} is requested to do an operation. (for example search)
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*/
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public Searcher wrap(EngineConfig engineConfig, final Searcher engineSearcher) throws EngineException {
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if (wrapper == null) {
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return engineSearcher;
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}
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DirectoryReader reader = wrapper.wrap((DirectoryReader) engineSearcher.reader());
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IndexSearcher innerIndexSearcher = new IndexSearcher(reader);
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innerIndexSearcher.setQueryCache(engineConfig.getQueryCache());
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innerIndexSearcher.setQueryCachingPolicy(engineConfig.getQueryCachingPolicy());
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innerIndexSearcher.setSimilarity(engineConfig.getSimilarity());
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// TODO: Right now IndexSearcher isn't wrapper friendly, when it becomes wrapper friendly we should revise this extension point
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// For example if IndexSearcher#rewrite() is overwritten than also IndexSearcher#createNormalizedWeight needs to be overwritten
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// This needs to be fixed before we can allow the IndexSearcher from Engine to be wrapped multiple times
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IndexSearcher indexSearcher = wrapper.wrap(innerIndexSearcher);
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if (reader == engineSearcher.reader() && indexSearcher == innerIndexSearcher) {
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return engineSearcher;
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} else {
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return new Engine.Searcher(engineSearcher.source(), indexSearcher) {
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@Override
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public void close() throws ElasticsearchException {
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engineSearcher.close();
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}
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};
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}
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}
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}
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@ -168,6 +168,7 @@ public class IndexShard extends AbstractIndexShardComponent {
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protected volatile IndexShardState state;
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protected final AtomicReference<Engine> currentEngineReference = new AtomicReference<>();
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protected final EngineFactory engineFactory;
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private final IndexSearcherWrappingService wrappingService;
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@Nullable
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private RecoveryState recoveryState;
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@ -197,12 +198,13 @@ public class IndexShard extends AbstractIndexShardComponent {
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IndicesQueryCache indicesQueryCache, ShardPercolateService shardPercolateService, CodecService codecService,
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ShardTermVectorsService termVectorsService, IndexFieldDataService indexFieldDataService, IndexService indexService,
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@Nullable IndicesWarmer warmer, SnapshotDeletionPolicy deletionPolicy, SimilarityService similarityService, EngineFactory factory,
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ClusterService clusterService, ShardPath path, BigArrays bigArrays) {
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ClusterService clusterService, ShardPath path, BigArrays bigArrays, IndexSearcherWrappingService wrappingService) {
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super(shardId, indexSettingsService.getSettings());
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this.codecService = codecService;
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this.warmer = warmer;
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this.deletionPolicy = deletionPolicy;
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this.similarityService = similarityService;
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this.wrappingService = wrappingService;
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Preconditions.checkNotNull(store, "Store must be provided to the index shard");
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Preconditions.checkNotNull(deletionPolicy, "Snapshot deletion policy must be provided to the index shard");
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this.engineFactory = factory;
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@ -1361,7 +1363,7 @@ public class IndexShard extends AbstractIndexShardComponent {
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};
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return new EngineConfig(shardId,
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threadPool, indexingService, indexSettingsService.indexSettings(), warmer, store, deletionPolicy, mergePolicyConfig.getMergePolicy(), mergeSchedulerConfig,
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mapperService.indexAnalyzer(), similarityService.similarity(), codecService, failedEngineListener, translogRecoveryPerformer, indexCache.query(), cachingPolicy, translogConfig);
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mapperService.indexAnalyzer(), similarityService.similarity(), codecService, failedEngineListener, translogRecoveryPerformer, indexCache.query(), cachingPolicy, wrappingService, translogConfig);
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}
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private static class IndexShardOperationCounter extends AbstractRefCounted {
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@ -21,7 +21,10 @@ package org.elasticsearch.index.shard;
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import org.elasticsearch.cluster.metadata.IndexMetaData;
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import org.elasticsearch.common.inject.AbstractModule;
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import org.elasticsearch.common.inject.multibindings.Multibinder;
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import org.elasticsearch.common.settings.Settings;
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import org.elasticsearch.index.engine.IndexSearcherWrapper;
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import org.elasticsearch.index.engine.IndexSearcherWrappingService;
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import org.elasticsearch.index.engine.EngineFactory;
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import org.elasticsearch.index.engine.InternalEngineFactory;
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import org.elasticsearch.index.percolator.stats.ShardPercolateService;
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@ -73,6 +76,10 @@ public class IndexShardModule extends AbstractModule {
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bind(StoreRecoveryService.class).asEagerSingleton();
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bind(ShardPercolateService.class).asEagerSingleton();
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bind(ShardTermVectorsService.class).asEagerSingleton();
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bind(IndexSearcherWrappingService.class).asEagerSingleton();
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// this injects an empty set in IndexSearcherWrappingService, otherwise guice can't construct IndexSearcherWrappingService
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Multibinder<IndexSearcherWrapper> multibinder
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= Multibinder.newSetBinder(binder(), IndexSearcherWrapper.class);
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}
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@ -28,6 +28,7 @@ import org.elasticsearch.index.aliases.IndexAliasesService;
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import org.elasticsearch.index.cache.IndexCache;
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import org.elasticsearch.index.codec.CodecService;
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import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
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import org.elasticsearch.index.engine.IndexSearcherWrappingService;
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import org.elasticsearch.index.engine.Engine;
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import org.elasticsearch.index.engine.EngineConfig;
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import org.elasticsearch.index.engine.EngineFactory;
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@ -66,13 +67,13 @@ public final class ShadowIndexShard extends IndexShard {
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IndexService indexService, @Nullable IndicesWarmer warmer,
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SnapshotDeletionPolicy deletionPolicy, SimilarityService similarityService,
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EngineFactory factory, ClusterService clusterService,
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ShardPath path, BigArrays bigArrays) throws IOException {
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ShardPath path, BigArrays bigArrays, IndexSearcherWrappingService wrappingService) throws IOException {
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super(shardId, indexSettingsService, indicesLifecycle, store, storeRecoveryService,
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threadPool, mapperService, queryParserService, indexCache, indexAliasesService,
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indicesQueryCache, shardPercolateService, codecService,
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termVectorsService, indexFieldDataService, indexService,
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warmer, deletionPolicy, similarityService,
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factory, clusterService, path, bigArrays);
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factory, clusterService, path, bigArrays, wrappingService);
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}
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/**
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@ -236,15 +236,15 @@ public class InternalEngineTests extends ElasticsearchTestCase {
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}
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protected InternalEngine createEngine(Store store, Path translogPath) {
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return createEngine(defaultSettings, store, translogPath, new MergeSchedulerConfig(defaultSettings), newMergePolicy());
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protected InternalEngine createEngine(Store store, Path translogPath, IndexSearcherWrapper... wrappers) {
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return createEngine(defaultSettings, store, translogPath, new MergeSchedulerConfig(defaultSettings), newMergePolicy(), wrappers);
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}
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protected InternalEngine createEngine(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig, MergePolicy mergePolicy) {
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return new InternalEngine(config(indexSettings, store, translogPath, mergeSchedulerConfig, mergePolicy), false);
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protected InternalEngine createEngine(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig, MergePolicy mergePolicy, IndexSearcherWrapper... wrappers) {
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return new InternalEngine(config(indexSettings, store, translogPath, mergeSchedulerConfig, mergePolicy, wrappers), false);
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}
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public EngineConfig config(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig, MergePolicy mergePolicy) {
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public EngineConfig config(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig, MergePolicy mergePolicy, IndexSearcherWrapper... wrappers) {
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IndexWriterConfig iwc = newIndexWriterConfig();
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TranslogConfig translogConfig = new TranslogConfig(shardId, translogPath, indexSettings, Translog.Durabilty.REQUEST, BigArrays.NON_RECYCLING_INSTANCE, threadPool);
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@ -255,7 +255,7 @@ public class InternalEngineTests extends ElasticsearchTestCase {
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public void onFailedEngine(ShardId shardId, String reason, @Nullable Throwable t) {
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// we don't need to notify anybody in this test
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}
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}, new TranslogHandler(shardId.index().getName()), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), translogConfig);
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}, new TranslogHandler(shardId.index().getName()), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), new IndexSearcherWrappingService(new HashSet<>(Arrays.asList(wrappers))), translogConfig);
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return config;
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}
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@ -493,6 +493,32 @@ public class InternalEngineTests extends ElasticsearchTestCase {
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;
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}
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@Test
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public void testIndexSearcherWrapper() throws Exception {
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final AtomicInteger counter = new AtomicInteger();
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IndexSearcherWrapper wrapper = new IndexSearcherWrapper() {
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@Override
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public DirectoryReader wrap(DirectoryReader reader) {
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counter.incrementAndGet();
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return reader;
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}
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@Override
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public IndexSearcher wrap(IndexSearcher searcher) throws EngineException {
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counter.incrementAndGet();
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return searcher;
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}
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};
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Store store = createStore();
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Path translog = createTempDir("translog-test");
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InternalEngine engine = createEngine(store, translog, wrapper);
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Engine.Searcher searcher = engine.acquireSearcher("test");
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assertThat(counter.get(), equalTo(2));
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searcher.close();
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IOUtils.close(store, engine);
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}
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@Test
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public void testSimpleOperations() throws Exception {
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Engine.Searcher searchResult = engine.acquireSearcher("test");
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@ -1985,7 +2011,7 @@ public class InternalEngineTests extends ElasticsearchTestCase {
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EngineConfig brokenConfig = new EngineConfig(shardId, threadPool, config.getIndexingService(), config.getIndexSettings()
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, null, store, createSnapshotDeletionPolicy(), newMergePolicy(), config.getMergeSchedulerConfig(),
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config.getAnalyzer(), config.getSimilarity(), new CodecService(shardId.index()), config.getFailedEngineListener()
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, config.getTranslogRecoveryPerformer(), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), translogConfig);
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, config.getTranslogRecoveryPerformer(), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), new IndexSearcherWrappingService(), translogConfig);
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||||
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||||
try {
|
||||
new InternalEngine(brokenConfig, false);
|
||||
|
|
|
|||
|
|
@ -47,7 +47,6 @@ import org.elasticsearch.index.mapper.ParseContext;
|
|||
import org.elasticsearch.index.mapper.ParsedDocument;
|
||||
import org.elasticsearch.index.mapper.internal.SourceFieldMapper;
|
||||
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
|
||||
import org.elasticsearch.index.settings.IndexSettingsService;
|
||||
import org.elasticsearch.index.shard.MergeSchedulerConfig;
|
||||
import org.elasticsearch.index.shard.ShardId;
|
||||
import org.elasticsearch.index.shard.ShardUtils;
|
||||
|
|
@ -226,7 +225,7 @@ public class ShadowEngineTests extends ElasticsearchTestCase {
|
|||
@Override
|
||||
public void onFailedEngine(ShardId shardId, String reason, @Nullable Throwable t) {
|
||||
// we don't need to notify anybody in this test
|
||||
}}, null, IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), translogConfig);
|
||||
}}, null, IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), new IndexSearcherWrappingService(), translogConfig);
|
||||
return config;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue