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/*
* 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.type;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRunnable;
import org.elasticsearch.action.search.ReduceSearchPhaseException;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.search.action.SearchServiceTransportAction;
import org.elasticsearch.search.controller.SearchPhaseController;
import org.elasticsearch.search.dfs.AggregatedDfs;
import org.elasticsearch.search.dfs.DfsSearchResult;
import org.elasticsearch.search.fetch.QueryFetchSearchResult;
import org.elasticsearch.search.internal.InternalSearchResponse;
import org.elasticsearch.search.internal.ShardSearchTransportRequest;
import org.elasticsearch.search.query.QuerySearchRequest;
import org.elasticsearch.threadpool.ThreadPool;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
/**
*
*/
public class TransportSearchDfsQueryAndFetchAction extends TransportSearchTypeAction {
@Inject
public TransportSearchDfsQueryAndFetchAction(Settings settings, ThreadPool threadPool, ClusterService clusterService,
SearchServiceTransportAction searchService, SearchPhaseController searchPhaseController,
ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, threadPool, clusterService, searchService, searchPhaseController, actionFilters, indexNameExpressionResolver);
}
@Override
protected void doExecute(SearchRequest searchRequest, ActionListener<SearchResponse> listener) {
new AsyncAction(searchRequest, listener).start();
}
private class AsyncAction extends BaseAsyncAction<DfsSearchResult> {
private final AtomicArray<QueryFetchSearchResult> queryFetchResults;
private AsyncAction(SearchRequest request, ActionListener<SearchResponse> listener) {
super(request, listener);
queryFetchResults = new AtomicArray<>(firstResults.length());
}
@Override
protected String firstPhaseName() {
return "dfs";
}
@Override
protected void sendExecuteFirstPhase(DiscoveryNode node, ShardSearchTransportRequest request, ActionListener<DfsSearchResult> listener) {
searchService.sendExecuteDfs(node, request, listener);
}
@Override
protected void moveToSecondPhase() {
final AggregatedDfs dfs = searchPhaseController.aggregateDfs(firstResults);
final AtomicInteger counter = new AtomicInteger(firstResults.asList().size());
for (final AtomicArray.Entry<DfsSearchResult> entry : firstResults.asList()) {
DfsSearchResult dfsResult = entry.value;
DiscoveryNode node = nodes.get(dfsResult.shardTarget().nodeId());
QuerySearchRequest querySearchRequest = new QuerySearchRequest(request, dfsResult.id(), dfs);
executeSecondPhase(entry.index, dfsResult, counter, node, querySearchRequest);
}
}
void executeSecondPhase(final int shardIndex, final DfsSearchResult dfsResult, final AtomicInteger counter, final DiscoveryNode node, final QuerySearchRequest querySearchRequest) {
searchService.sendExecuteFetch(node, querySearchRequest, new ActionListener<QueryFetchSearchResult>() {
@Override
public void onResponse(QueryFetchSearchResult result) {
result.shardTarget(dfsResult.shardTarget());
queryFetchResults.set(shardIndex, result);
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
@Override
public void onFailure(Throwable t) {
try {
onSecondPhaseFailure(t, querySearchRequest, shardIndex, dfsResult, counter);
} finally {
// the query might not have been executed at all (for example because thread pool rejected execution)
// and the search context that was created in dfs phase might not be released.
// release it again to be in the safe side
sendReleaseSearchContext(querySearchRequest.id(), node);
}
}
});
}
void onSecondPhaseFailure(Throwable t, QuerySearchRequest querySearchRequest, int shardIndex, DfsSearchResult dfsResult, AtomicInteger counter) {
if (logger.isDebugEnabled()) {
logger.debug("[{}] Failed to execute query phase", t, querySearchRequest.id());
}
this.addShardFailure(shardIndex, dfsResult.shardTarget(), t);
successfulOps.decrementAndGet();
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
private void finishHim() {
threadPool.executor(ThreadPool.Names.SEARCH).execute(new ActionRunnable<SearchResponse>(listener) {
@Override
public void doRun() throws IOException {
sortedShardList = searchPhaseController.sortDocs(true, queryFetchResults);
final InternalSearchResponse internalResponse = searchPhaseController.merge(sortedShardList, queryFetchResults,
queryFetchResults);
String scrollId = null;
if (request.scroll() != null) {
scrollId = TransportSearchHelper.buildScrollId(request.searchType(), firstResults, null);
}
listener.onResponse(new SearchResponse(internalResponse, scrollId, expectedSuccessfulOps, successfulOps.get(), buildTookInMillis(), buildShardFailures()));
}
@Override
public void onFailure(Throwable t) {
ReduceSearchPhaseException failure = new ReduceSearchPhaseException("query_fetch", "", t, buildShardFailures());
if (logger.isDebugEnabled()) {
logger.debug("failed to reduce search", failure);
}
super.onFailure(t);
}
});
}
}
}
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