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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;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.apache.logging.log4j.util.Supplier;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRunnable;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.routing.GroupShardsIterator;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.search.dfs.AggregatedDfs;
import org.elasticsearch.search.dfs.DfsSearchResult;
import org.elasticsearch.search.fetch.QueryFetchSearchResult;
import org.elasticsearch.search.internal.AliasFilter;
import org.elasticsearch.search.internal.InternalSearchResponse;
import org.elasticsearch.search.internal.ShardSearchTransportRequest;
import org.elasticsearch.search.query.QuerySearchRequest;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Function;
class SearchDfsQueryAndFetchAsyncAction extends AbstractSearchAsyncAction<DfsSearchResult> {
private final AtomicArray<QueryFetchSearchResult> queryFetchResults;
private final SearchPhaseController searchPhaseController;
SearchDfsQueryAndFetchAsyncAction(Logger logger, SearchTransportService searchTransportService,
Function<String, DiscoveryNode> nodeIdToDiscoveryNode,
Map<String, AliasFilter> aliasFilter, Map<String, Float> concreteIndexBoosts,
SearchPhaseController searchPhaseController, Executor executor, SearchRequest request,
ActionListener<SearchResponse> listener, GroupShardsIterator shardsIts,
long startTime, long clusterStateVersion, SearchTask task) {
super(logger, searchTransportService, nodeIdToDiscoveryNode, aliasFilter, concreteIndexBoosts, executor,
request, listener, shardsIts, startTime, clusterStateVersion, task);
this.searchPhaseController = searchPhaseController;
queryFetchResults = new AtomicArray<>(firstResults.length());
}
@Override
protected String firstPhaseName() {
return "dfs";
}
@Override
protected void sendExecuteFirstPhase(DiscoveryNode node, ShardSearchTransportRequest request,
ActionListener<DfsSearchResult> listener) {
searchTransportService.sendExecuteDfs(node, request, task, 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 = nodeIdToDiscoveryNode.apply(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) {
searchTransportService.sendExecuteFetch(node, querySearchRequest, task, 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(Exception 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(Exception e, QuerySearchRequest querySearchRequest, int shardIndex, DfsSearchResult dfsResult,
AtomicInteger counter) {
if (logger.isDebugEnabled()) {
logger.debug((Supplier<?>) () -> new ParameterizedMessage("[{}] Failed to execute query phase", querySearchRequest.id()), e);
}
this.addShardFailure(shardIndex, dfsResult.shardTarget(), e);
successfulOps.decrementAndGet();
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
private void finishHim() {
getExecutor().execute(new ActionRunnable<SearchResponse>(listener) {
@Override
public void doRun() throws IOException {
sortedShardDocs = searchPhaseController.sortDocs(true, queryFetchResults);
final InternalSearchResponse internalResponse = searchPhaseController.merge(true, sortedShardDocs, queryFetchResults,
queryFetchResults);
String scrollId = null;
if (request.scroll() != null) {
scrollId = TransportSearchHelper.buildScrollId(request.searchType(), firstResults);
}
listener.onResponse(new SearchResponse(internalResponse, scrollId, expectedSuccessfulOps, successfulOps.get(),
buildTookInMillis(), buildShardFailures()));
}
@Override
public void onFailure(Exception e) {
ReduceSearchPhaseException failure = new ReduceSearchPhaseException("query_fetch", "", e, buildShardFailures());
if (logger.isDebugEnabled()) {
logger.debug("failed to reduce search", failure);
}
super.onFailure(e);
}
});
}
}
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