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/*
* Licensed to ElasticSearch and Shay Banon 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.elasticsearch.action.ActionListener;
import org.elasticsearch.action.search.type.*;
import org.elasticsearch.action.support.TransportAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.indices.IndexMissingException;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.BaseTransportRequestHandler;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportService;
import java.util.Map;
import java.util.Set;
import static org.elasticsearch.action.search.SearchType.*;
/**
*
*/
public class TransportSearchAction extends TransportAction {
private final ClusterService clusterService;
private final TransportSearchDfsQueryThenFetchAction dfsQueryThenFetchAction;
private final TransportSearchQueryThenFetchAction queryThenFetchAction;
private final TransportSearchDfsQueryAndFetchAction dfsQueryAndFetchAction;
private final TransportSearchQueryAndFetchAction queryAndFetchAction;
private final TransportSearchScanAction scanAction;
private final TransportSearchCountAction countAction;
private final boolean optimizeSingleShard;
@Inject
public TransportSearchAction(Settings settings, ThreadPool threadPool,
TransportService transportService, ClusterService clusterService,
TransportSearchDfsQueryThenFetchAction dfsQueryThenFetchAction,
TransportSearchQueryThenFetchAction queryThenFetchAction,
TransportSearchDfsQueryAndFetchAction dfsQueryAndFetchAction,
TransportSearchQueryAndFetchAction queryAndFetchAction,
TransportSearchScanAction scanAction,
TransportSearchCountAction countAction) {
super(settings, threadPool);
this.clusterService = clusterService;
this.dfsQueryThenFetchAction = dfsQueryThenFetchAction;
this.queryThenFetchAction = queryThenFetchAction;
this.dfsQueryAndFetchAction = dfsQueryAndFetchAction;
this.queryAndFetchAction = queryAndFetchAction;
this.scanAction = scanAction;
this.countAction = countAction;
this.optimizeSingleShard = componentSettings.getAsBoolean("optimize_single_shard", true);
transportService.registerHandler(SearchAction.NAME, new TransportHandler());
}
@Override
protected void doExecute(SearchRequest searchRequest, ActionListener listener) {
// optimize search type for cases where there is only one shard group to search on
if (optimizeSingleShard && searchRequest.searchType() != SCAN && searchRequest.searchType() != COUNT) {
try {
ClusterState clusterState = clusterService.state();
String[] concreteIndices = clusterState.metaData().concreteIndices(searchRequest.indices(), searchRequest.ignoreIndices(), true);
Map> routingMap = clusterState.metaData().resolveSearchRouting(searchRequest.routing(), searchRequest.indices());
int shardCount = clusterService.operationRouting().searchShardsCount(clusterState, searchRequest.indices(), concreteIndices, routingMap, searchRequest.preference());
if (shardCount == 1) {
// if we only have one group, then we always want Q_A_F, no need for DFS, and no need to do THEN since we hit one shard
searchRequest.searchType(QUERY_AND_FETCH);
}
} catch (IndexMissingException e) {
// ignore this, we will notify the search response if its really the case
// from the actual action
} catch (Exception e) {
logger.debug("failed to optimize search type, continue as normal", e);
}
}
if (searchRequest.searchType() == DFS_QUERY_THEN_FETCH) {
dfsQueryThenFetchAction.execute(searchRequest, listener);
} else if (searchRequest.searchType() == SearchType.QUERY_THEN_FETCH) {
queryThenFetchAction.execute(searchRequest, listener);
} else if (searchRequest.searchType() == SearchType.DFS_QUERY_AND_FETCH) {
dfsQueryAndFetchAction.execute(searchRequest, listener);
} else if (searchRequest.searchType() == SearchType.QUERY_AND_FETCH) {
queryAndFetchAction.execute(searchRequest, listener);
} else if (searchRequest.searchType() == SearchType.SCAN) {
scanAction.execute(searchRequest, listener);
} else if (searchRequest.searchType() == SearchType.COUNT) {
countAction.execute(searchRequest, listener);
}
}
private class TransportHandler extends BaseTransportRequestHandler {
@Override
public SearchRequest newInstance() {
return new SearchRequest();
}
@Override
public void messageReceived(SearchRequest request, final TransportChannel channel) throws Exception {
// no need for a threaded listener
request.listenerThreaded(false);
// we don't spawn, so if we get a request with no threading, change it to single threaded
if (request.operationThreading() == SearchOperationThreading.NO_THREADS) {
request.operationThreading(SearchOperationThreading.SINGLE_THREAD);
}
execute(request, new ActionListener() {
@Override
public void onResponse(SearchResponse result) {
try {
channel.sendResponse(result);
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(e);
} catch (Exception e1) {
logger.warn("Failed to send response for search", e1);
}
}
});
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
}
}
