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Elasticsearch subproject :server
/*
* 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.action.search;
import org.apache.logging.log4j.Logger;
import org.apache.lucene.search.TopFieldDocs;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.routing.GroupShardsIterator;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.search.SearchPhaseResult;
import org.elasticsearch.search.SearchShardTarget;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.internal.AliasFilter;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.search.internal.ShardSearchRequest;
import org.elasticsearch.search.query.QuerySearchResult;
import org.elasticsearch.transport.Transport;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Executor;
import java.util.function.BiFunction;
import static org.elasticsearch.action.search.SearchPhaseController.getTopDocsSize;
class SearchQueryThenFetchAsyncAction extends AbstractSearchAsyncAction {
private final SearchPhaseController searchPhaseController;
private final SearchProgressListener progressListener;
// informations to track the best bottom top doc globally.
private final int topDocsSize;
private final int trackTotalHitsUpTo;
private volatile BottomSortValuesCollector bottomSortCollector;
SearchQueryThenFetchAsyncAction(final Logger logger, final SearchTransportService searchTransportService,
final BiFunction nodeIdToConnection,
final Map aliasFilter,
final Map concreteIndexBoosts, final Map> indexRoutings,
final SearchPhaseController searchPhaseController, final Executor executor,
final SearchRequest request, final ActionListener listener,
final GroupShardsIterator shardsIts,
final TransportSearchAction.SearchTimeProvider timeProvider,
ClusterState clusterState, SearchTask task, SearchResponse.Clusters clusters) {
super("query", logger, searchTransportService, nodeIdToConnection, aliasFilter, concreteIndexBoosts, indexRoutings,
executor, request, listener, shardsIts, timeProvider, clusterState, task,
searchPhaseController.newSearchPhaseResults(task.getProgressListener(), request, shardsIts.size()),
request.getMaxConcurrentShardRequests(), clusters);
this.topDocsSize = getTopDocsSize(request);
this.trackTotalHitsUpTo = request.resolveTrackTotalHitsUpTo();
this.searchPhaseController = searchPhaseController;
this.progressListener = task.getProgressListener();
final SearchSourceBuilder sourceBuilder = request.source();
progressListener.notifyListShards(SearchProgressListener.buildSearchShards(this.shardsIts),
SearchProgressListener.buildSearchShards(toSkipShardsIts), clusters, sourceBuilder == null || sourceBuilder.size() != 0);
}
protected void executePhaseOnShard(final SearchShardIterator shardIt, final ShardRouting shard,
final SearchActionListener listener) {
ShardSearchRequest request = rewriteShardSearchRequest(super.buildShardSearchRequest(shardIt));
getSearchTransport().sendExecuteQuery(getConnection(shardIt.getClusterAlias(), shard.currentNodeId()),
request, getTask(), listener);
}
@Override
protected void onShardGroupFailure(int shardIndex, SearchShardTarget shardTarget, Exception exc) {
progressListener.notifyQueryFailure(shardIndex, shardTarget, exc);
}
@Override
protected void onShardResult(SearchPhaseResult result, SearchShardIterator shardIt) {
QuerySearchResult queryResult = result.queryResult();
if (queryResult.isNull() == false
// disable sort optims for scroll requests because they keep track of the last bottom doc locally (per shard)
&& getRequest().scroll() == null
&& queryResult.topDocs().topDocs instanceof TopFieldDocs) {
TopFieldDocs topDocs = (TopFieldDocs) queryResult.topDocs().topDocs;
if (bottomSortCollector == null) {
synchronized (this) {
if (bottomSortCollector == null) {
bottomSortCollector = new BottomSortValuesCollector(topDocsSize, topDocs.fields);
}
}
}
bottomSortCollector.consumeTopDocs(topDocs, queryResult.sortValueFormats());
}
super.onShardResult(result, shardIt);
}
@Override
protected SearchPhase getNextPhase(final SearchPhaseResults results, final SearchPhaseContext context) {
return new FetchSearchPhase(results, searchPhaseController, context, clusterState());
}
private ShardSearchRequest rewriteShardSearchRequest(ShardSearchRequest request) {
if (bottomSortCollector == null) {
return request;
}
// disable tracking total hits if we already reached the required estimation.
if (trackTotalHitsUpTo != SearchContext.TRACK_TOTAL_HITS_ACCURATE
&& bottomSortCollector.getTotalHits() > trackTotalHitsUpTo) {
request.source(request.source().shallowCopy().trackTotalHits(false));
}
// set the current best bottom field doc
if (bottomSortCollector.getBottomSortValues() != null) {
request.setBottomSortValues(bottomSortCollector.getBottomSortValues());
}
return request;
}
}