org.elasticsearch.action.suggest.TransportSuggestAction 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 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.suggest;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.ShardOperationFailedException;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.DefaultShardOperationFailedException;
import org.elasticsearch.action.support.broadcast.BroadcastShardOperationFailedException;
import org.elasticsearch.action.support.broadcast.TransportBroadcastAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.routing.GroupShardsIterator;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.IndexService;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.suggest.stats.ShardSuggestMetric;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.search.suggest.Suggest;
import org.elasticsearch.search.suggest.SuggestPhase;
import org.elasticsearch.search.suggest.SuggestionSearchContext;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReferenceArray;
/**
* Defines the transport of a suggestion request across the cluster
*/
public class TransportSuggestAction extends TransportBroadcastAction {
private final IndicesService indicesService;
private final SuggestPhase suggestPhase;
@Inject
public TransportSuggestAction(Settings settings, ThreadPool threadPool, ClusterService clusterService, TransportService transportService,
IndicesService indicesService, SuggestPhase suggestPhase, ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, SuggestAction.NAME, threadPool, clusterService, transportService, actionFilters, indexNameExpressionResolver,
SuggestRequest.class, ShardSuggestRequest.class, ThreadPool.Names.SUGGEST);
this.indicesService = indicesService;
this.suggestPhase = suggestPhase;
}
@Override
protected ShardSuggestRequest newShardRequest(int numShards, ShardRouting shard, SuggestRequest request) {
return new ShardSuggestRequest(shard.shardId(), request);
}
@Override
protected ShardSuggestResponse newShardResponse() {
return new ShardSuggestResponse();
}
@Override
protected GroupShardsIterator shards(ClusterState clusterState, SuggestRequest request, String[] concreteIndices) {
Map> routingMap = indexNameExpressionResolver.resolveSearchRouting(clusterState, request.routing(), request.indices());
return clusterService.operationRouting().searchShards(clusterState, concreteIndices, routingMap, request.preference());
}
@Override
protected ClusterBlockException checkGlobalBlock(ClusterState state, SuggestRequest request) {
return state.blocks().globalBlockedException(ClusterBlockLevel.READ);
}
@Override
protected ClusterBlockException checkRequestBlock(ClusterState state, SuggestRequest countRequest, String[] concreteIndices) {
return state.blocks().indicesBlockedException(ClusterBlockLevel.READ, concreteIndices);
}
@Override
protected SuggestResponse newResponse(SuggestRequest request, AtomicReferenceArray shardsResponses, ClusterState clusterState) {
int successfulShards = 0;
int failedShards = 0;
final Map> groupedSuggestions = new HashMap<>();
List shardFailures = null;
for (int i = 0; i < shardsResponses.length(); i++) {
Object shardResponse = shardsResponses.get(i);
if (shardResponse == null) {
// simply ignore non active shards
} else if (shardResponse instanceof BroadcastShardOperationFailedException) {
failedShards++;
if (shardFailures == null) {
shardFailures = new ArrayList<>();
}
shardFailures.add(new DefaultShardOperationFailedException((BroadcastShardOperationFailedException) shardResponse));
} else {
Suggest suggest = ((ShardSuggestResponse) shardResponse).getSuggest();
Suggest.group(groupedSuggestions, suggest);
successfulShards++;
}
}
return new SuggestResponse(new Suggest(Suggest.reduce(groupedSuggestions)), shardsResponses.length(), successfulShards, failedShards, shardFailures);
}
@Override
protected ShardSuggestResponse shardOperation(ShardSuggestRequest request) {
IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex());
IndexShard indexShard = indexService.shardSafe(request.shardId().id());
ShardSuggestMetric suggestMetric = indexShard.getSuggestMetric();
suggestMetric.preSuggest();
long startTime = System.nanoTime();
XContentParser parser = null;
try (Engine.Searcher searcher = indexShard.acquireSearcher("suggest")) {
BytesReference suggest = request.suggest();
if (suggest != null && suggest.length() > 0) {
parser = XContentFactory.xContent(suggest).createParser(suggest);
if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
throw new IllegalArgumentException("suggest content missing");
}
final SuggestionSearchContext context = suggestPhase.parseElement().parseInternal(parser, indexService.mapperService(),
indexService.queryParserService(), request.shardId().getIndex(), request.shardId().id(), request);
final Suggest result = suggestPhase.execute(context, searcher.searcher());
return new ShardSuggestResponse(request.shardId(), result);
}
return new ShardSuggestResponse(request.shardId(), new Suggest());
} catch (Throwable ex) {
throw new ElasticsearchException("failed to execute suggest", ex);
} finally {
if (parser != null) {
parser.close();
}
suggestMetric.postSuggest(System.nanoTime() - startTime);
}
}
}