org.elasticsearch.search.internal.DefaultSearchContext 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 - Open Source, Distributed, RESTful Search Engine
/*
* 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.search.internal;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.Sort;
import org.apache.lucene.util.Counter;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.cache.recycler.PageCacheRecycler;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.ParseFieldMatcher;
import org.elasticsearch.common.lease.Releasables;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.lucene.search.function.BoostScoreFunction;
import org.elasticsearch.common.lucene.search.function.FunctionScoreQuery;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.BigArrays;
import org.elasticsearch.index.IndexService;
import org.elasticsearch.index.analysis.AnalysisService;
import org.elasticsearch.index.cache.bitset.BitsetFilterCache;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.fielddata.IndexFieldDataService;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.index.mapper.object.ObjectMapper;
import org.elasticsearch.index.query.IndexQueryParserService;
import org.elasticsearch.index.query.ParsedQuery;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.similarity.SimilarityService;
import org.elasticsearch.script.ScriptService;
import org.elasticsearch.search.SearchShardTarget;
import org.elasticsearch.search.aggregations.SearchContextAggregations;
import org.elasticsearch.search.dfs.DfsSearchResult;
import org.elasticsearch.search.fetch.FetchSearchResult;
import org.elasticsearch.search.fetch.FetchSubPhase;
import org.elasticsearch.search.fetch.FetchSubPhaseContext;
import org.elasticsearch.search.fetch.innerhits.InnerHitsContext;
import org.elasticsearch.search.fetch.script.ScriptFieldsContext;
import org.elasticsearch.search.fetch.source.FetchSourceContext;
import org.elasticsearch.search.highlight.SearchContextHighlight;
import org.elasticsearch.search.lookup.SearchLookup;
import org.elasticsearch.search.query.QueryPhaseExecutionException;
import org.elasticsearch.search.profile.Profiler;
import org.elasticsearch.search.profile.Profilers;
import org.elasticsearch.search.query.QuerySearchResult;
import org.elasticsearch.search.rescore.RescoreSearchContext;
import org.elasticsearch.search.scan.ScanContext;
import org.elasticsearch.search.suggest.SuggestionSearchContext;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
*
*/
public class DefaultSearchContext extends SearchContext {
/**
* Index setting describing the maximum value of from + size on a query.
*/
public static final String MAX_RESULT_WINDOW = "index.max_result_window";
public static class Defaults {
/**
* Default maximum value of from + size on a query. 10,000 was chosen as
* a conservative default as it is sure to not cause trouble. Users can
* certainly profile their cluster and decide to set it to 100,000
* safely. 1,000,000 is probably way to high for any cluster to set
* safely.
*/
public static final int MAX_RESULT_WINDOW = 10000;
}
private final long id;
private final ShardSearchRequest request;
private final SearchShardTarget shardTarget;
private final Counter timeEstimateCounter;
private SearchType searchType;
private final Engine.Searcher engineSearcher;
private final ScriptService scriptService;
private final PageCacheRecycler pageCacheRecycler;
private final BigArrays bigArrays;
private final IndexShard indexShard;
private final IndexService indexService;
private final ContextIndexSearcher searcher;
private final DfsSearchResult dfsResult;
private final QuerySearchResult queryResult;
private final FetchSearchResult fetchResult;
// lazy initialized only if needed
private ScanContext scanContext;
private float queryBoost = 1.0f;
// timeout in millis
private long timeoutInMillis;
// terminate after count
private int terminateAfter = DEFAULT_TERMINATE_AFTER;
private List groupStats;
private ScrollContext scrollContext;
private boolean explain;
private boolean version = false; // by default, we don't return versions
private List fieldNames;
private ScriptFieldsContext scriptFields;
private FetchSourceContext fetchSourceContext;
private int from = -1;
private int size = -1;
private Sort sort;
private Float minimumScore;
private boolean trackScores = false; // when sorting, track scores as well...
/**
* The original query as sent by the user without the types and aliases
* applied. Putting things in here leaks them into highlighting so don't add
* things like the type filter or alias filters.
*/
private ParsedQuery originalQuery;
/**
* Just like originalQuery but with the filters from types and aliases
* applied.
*/
private ParsedQuery filteredQuery;
/**
* The query to actually execute.
*/
private Query query;
private ParsedQuery postFilter;
private Query aliasFilter;
private int[] docIdsToLoad;
private int docsIdsToLoadFrom;
private int docsIdsToLoadSize;
private SearchContextAggregations aggregations;
private SearchContextHighlight highlight;
private SuggestionSearchContext suggest;
private List rescore;
private SearchLookup searchLookup;
private volatile long keepAlive;
private final long originNanoTime = System.nanoTime();
private volatile long lastAccessTime = -1;
private Profilers profilers;
private final Map subPhaseContexts = new HashMap<>();
private final Map, Collector> queryCollectors = new HashMap<>();
public DefaultSearchContext(long id, ShardSearchRequest request, SearchShardTarget shardTarget,
Engine.Searcher engineSearcher, IndexService indexService, IndexShard indexShard,
ScriptService scriptService, PageCacheRecycler pageCacheRecycler,
BigArrays bigArrays, Counter timeEstimateCounter, ParseFieldMatcher parseFieldMatcher,
TimeValue timeout
) {
super(parseFieldMatcher, request);
this.id = id;
this.request = request;
this.searchType = request.searchType();
this.shardTarget = shardTarget;
this.engineSearcher = engineSearcher;
this.scriptService = scriptService;
this.pageCacheRecycler = pageCacheRecycler;
// SearchContexts use a BigArrays that can circuit break
this.bigArrays = bigArrays.withCircuitBreaking();
this.dfsResult = new DfsSearchResult(id, shardTarget);
this.queryResult = new QuerySearchResult(id, shardTarget);
this.fetchResult = new FetchSearchResult(id, shardTarget);
this.indexShard = indexShard;
this.indexService = indexService;
this.searcher = new ContextIndexSearcher(engineSearcher, indexService.cache().query(), indexShard.getQueryCachingPolicy());
this.timeEstimateCounter = timeEstimateCounter;
this.timeoutInMillis = timeout.millis();
}
@Override
public void doClose() {
scanContext = null;
// clear and scope phase we have
Releasables.close(searcher, engineSearcher);
}
/**
* Should be called before executing the main query and after all other parameters have been set.
*/
@Override
public void preProcess() {
if (scrollContext == null) {
long from = from() == -1 ? 0 : from();
long size = size() == -1 ? 10 : size();
long resultWindow = from + size;
// We need settingsService's view of the settings because its dynamic.
// indexService's isn't.
int maxResultWindow = indexService.indexSettings().getAsInt(MAX_RESULT_WINDOW, Defaults.MAX_RESULT_WINDOW);
if (resultWindow > maxResultWindow) {
throw new QueryPhaseExecutionException(this,
"Result window is too large, from + size must be less than or equal to: [" + maxResultWindow + "] but was ["
+ resultWindow + "]. See the scroll api for a more efficient way to request large data sets. "
+ "This limit can be set by changing the [" + DefaultSearchContext.MAX_RESULT_WINDOW
+ "] index level parameter.");
}
}
// initialize the filtering alias based on the provided filters
aliasFilter = indexService.aliasesService().aliasFilter(request.filteringAliases());
if (query() == null) {
parsedQuery(ParsedQuery.parsedMatchAllQuery());
}
if (queryBoost() != 1.0f) {
parsedQuery(new ParsedQuery(new FunctionScoreQuery(query(), new BoostScoreFunction(queryBoost)), parsedQuery()));
}
filteredQuery(buildFilteredQuery());
try {
this.query = searcher().rewrite(this.query);
} catch (IOException e) {
throw new QueryPhaseExecutionException(this, "Failed to rewrite main query", e);
}
}
private ParsedQuery buildFilteredQuery() {
Query searchFilter = searchFilter(types());
if (searchFilter == null) {
return originalQuery;
}
Query result;
if (Queries.isConstantMatchAllQuery(query())) {
result = new ConstantScoreQuery(searchFilter);
result.setBoost(query().getBoost());
} else {
result = new BooleanQuery.Builder()
.add(query, Occur.MUST)
.add(searchFilter, Occur.FILTER)
.build();
}
return new ParsedQuery(result, originalQuery);
}
@Override
public Query searchFilter(String[] types) {
Query filter = mapperService().searchFilter(types);
if (filter == null && aliasFilter == null) {
return null;
}
BooleanQuery.Builder bq = new BooleanQuery.Builder();
if (filter != null) {
bq.add(filter, Occur.MUST);
}
if (aliasFilter != null) {
bq.add(aliasFilter, Occur.MUST);
}
return new ConstantScoreQuery(bq.build());
}
@Override
public long id() {
return this.id;
}
@Override
public String source() {
return engineSearcher.source();
}
@Override
public ShardSearchRequest request() {
return this.request;
}
@Override
public SearchType searchType() {
return this.searchType;
}
@Override
public SearchContext searchType(SearchType searchType) {
this.searchType = searchType;
return this;
}
@Override
public SearchShardTarget shardTarget() {
return this.shardTarget;
}
@Override
public int numberOfShards() {
return request.numberOfShards();
}
@Override
public boolean hasTypes() {
return request.types() != null && request.types().length > 0;
}
@Override
public String[] types() {
return request.types();
}
@Override
public float queryBoost() {
return queryBoost;
}
@Override
public SearchContext queryBoost(float queryBoost) {
this.queryBoost = queryBoost;
return this;
}
@Override
public long getOriginNanoTime() {
return originNanoTime;
}
@Override
protected long nowInMillisImpl() {
return request.nowInMillis();
}
@Override
public ScrollContext scrollContext() {
return this.scrollContext;
}
@Override
public SearchContext scrollContext(ScrollContext scrollContext) {
this.scrollContext = scrollContext;
return this;
}
@Override
public SearchContextAggregations aggregations() {
return aggregations;
}
@Override
public SearchContext aggregations(SearchContextAggregations aggregations) {
this.aggregations = aggregations;
return this;
}
@Override
public SubPhaseContext getFetchSubPhaseContext(FetchSubPhase.ContextFactory contextFactory) {
String subPhaseName = contextFactory.getName();
if (subPhaseContexts.get(subPhaseName) == null) {
subPhaseContexts.put(subPhaseName, contextFactory.newContextInstance());
}
return (SubPhaseContext) subPhaseContexts.get(subPhaseName);
}
@Override
public SearchContextHighlight highlight() {
return highlight;
}
@Override
public void highlight(SearchContextHighlight highlight) {
this.highlight = highlight;
}
@Override
public SuggestionSearchContext suggest() {
return suggest;
}
@Override
public void suggest(SuggestionSearchContext suggest) {
this.suggest = suggest;
}
@Override
public List rescore() {
if (rescore == null) {
return Collections.emptyList();
}
return rescore;
}
@Override
public void addRescore(RescoreSearchContext rescore) {
if (this.rescore == null) {
this.rescore = new ArrayList<>();
}
this.rescore.add(rescore);
}
@Override
public boolean hasScriptFields() {
return scriptFields != null;
}
@Override
public ScriptFieldsContext scriptFields() {
if (scriptFields == null) {
scriptFields = new ScriptFieldsContext();
}
return this.scriptFields;
}
/**
* A shortcut function to see whether there is a fetchSourceContext and it says the source is requested.
*/
@Override
public boolean sourceRequested() {
return fetchSourceContext != null && fetchSourceContext.fetchSource();
}
@Override
public boolean hasFetchSourceContext() {
return fetchSourceContext != null;
}
@Override
public FetchSourceContext fetchSourceContext() {
return this.fetchSourceContext;
}
@Override
public SearchContext fetchSourceContext(FetchSourceContext fetchSourceContext) {
this.fetchSourceContext = fetchSourceContext;
return this;
}
@Override
public ContextIndexSearcher searcher() {
return this.searcher;
}
@Override
public IndexShard indexShard() {
return this.indexShard;
}
@Override
public MapperService mapperService() {
return indexService.mapperService();
}
@Override
public AnalysisService analysisService() {
return indexService.analysisService();
}
@Override
public IndexQueryParserService queryParserService() {
return indexService.queryParserService();
}
@Override
public SimilarityService similarityService() {
return indexService.similarityService();
}
@Override
public ScriptService scriptService() {
return scriptService;
}
@Override
public PageCacheRecycler pageCacheRecycler() {
return pageCacheRecycler;
}
@Override
public BigArrays bigArrays() {
return bigArrays;
}
@Override
public BitsetFilterCache bitsetFilterCache() {
return indexService.bitsetFilterCache();
}
@Override
public IndexFieldDataService fieldData() {
return indexService.fieldData();
}
@Override
public long timeoutInMillis() {
return timeoutInMillis;
}
@Override
public void timeoutInMillis(long timeoutInMillis) {
this.timeoutInMillis = timeoutInMillis;
}
@Override
public int terminateAfter() {
return terminateAfter;
}
@Override
public void terminateAfter(int terminateAfter) {
this.terminateAfter = terminateAfter;
}
@Override
public SearchContext minimumScore(float minimumScore) {
this.minimumScore = minimumScore;
return this;
}
@Override
public Float minimumScore() {
return this.minimumScore;
}
@Override
public SearchContext sort(Sort sort) {
this.sort = sort;
return this;
}
@Override
public Sort sort() {
return this.sort;
}
@Override
public SearchContext trackScores(boolean trackScores) {
this.trackScores = trackScores;
return this;
}
@Override
public boolean trackScores() {
return this.trackScores;
}
@Override
public SearchContext parsedPostFilter(ParsedQuery postFilter) {
this.postFilter = postFilter;
return this;
}
@Override
public ParsedQuery parsedPostFilter() {
return this.postFilter;
}
@Override
public Query aliasFilter() {
return aliasFilter;
}
@Override
public SearchContext parsedQuery(ParsedQuery query) {
this.originalQuery = query;
this.query = query.query();
return this;
}
public ParsedQuery filteredQuery() {
return filteredQuery;
}
private void filteredQuery(ParsedQuery filteredQuery) {
this.filteredQuery = filteredQuery;
this.query = filteredQuery.query();
}
@Override
public ParsedQuery parsedQuery() {
return this.originalQuery;
}
/**
* The query to execute, in its rewritten form.
*/
@Override
public Query query() {
return this.query;
}
@Override
public int from() {
return from;
}
@Override
public SearchContext from(int from) {
this.from = from;
return this;
}
@Override
public int size() {
return size;
}
@Override
public SearchContext size(int size) {
this.size = size;
return this;
}
@Override
public boolean hasFieldNames() {
return fieldNames != null;
}
@Override
public List fieldNames() {
if (fieldNames == null) {
fieldNames = new ArrayList<>();
}
return fieldNames;
}
@Override
public void emptyFieldNames() {
this.fieldNames = Collections.emptyList();
}
@Override
public boolean explain() {
return explain;
}
@Override
public void explain(boolean explain) {
this.explain = explain;
}
@Override
@Nullable
public List groupStats() {
return this.groupStats;
}
@Override
public void groupStats(List groupStats) {
this.groupStats = groupStats;
}
@Override
public boolean version() {
return version;
}
@Override
public void version(boolean version) {
this.version = version;
}
@Override
public int[] docIdsToLoad() {
return docIdsToLoad;
}
@Override
public int docIdsToLoadFrom() {
return docsIdsToLoadFrom;
}
@Override
public int docIdsToLoadSize() {
return docsIdsToLoadSize;
}
@Override
public SearchContext docIdsToLoad(int[] docIdsToLoad, int docsIdsToLoadFrom, int docsIdsToLoadSize) {
this.docIdsToLoad = docIdsToLoad;
this.docsIdsToLoadFrom = docsIdsToLoadFrom;
this.docsIdsToLoadSize = docsIdsToLoadSize;
return this;
}
@Override
public void accessed(long accessTime) {
this.lastAccessTime = accessTime;
}
@Override
public long lastAccessTime() {
return this.lastAccessTime;
}
@Override
public long keepAlive() {
return this.keepAlive;
}
@Override
public void keepAlive(long keepAlive) {
this.keepAlive = keepAlive;
}
@Override
public SearchLookup lookup() {
// TODO: The types should take into account the parsing context in QueryParserContext...
if (searchLookup == null) {
searchLookup = new SearchLookup(mapperService(), fieldData(), request.types());
}
return searchLookup;
}
@Override
public DfsSearchResult dfsResult() {
return dfsResult;
}
@Override
public QuerySearchResult queryResult() {
return queryResult;
}
@Override
public FetchSearchResult fetchResult() {
return fetchResult;
}
@Override
public ScanContext scanContext() {
if (scanContext == null) {
scanContext = new ScanContext();
}
return scanContext;
}
@Override
public MappedFieldType smartNameFieldType(String name) {
return mapperService().smartNameFieldType(name, request.types());
}
@Override
public MappedFieldType smartNameFieldTypeFromAnyType(String name) {
return mapperService().smartNameFieldType(name);
}
@Override
public ObjectMapper getObjectMapper(String name) {
return mapperService().getObjectMapper(name, request.types());
}
@Override
public Counter timeEstimateCounter() {
return timeEstimateCounter;
}
@Override
public Map, Collector> queryCollectors() {
return queryCollectors;
}
@Override
public Profilers getProfilers() {
return profilers;
}
public void setProfilers(Profilers profilers) {
this.profilers = profilers;
}
}