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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.action.get;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.TransportActions;
import org.elasticsearch.action.support.single.shard.TransportSingleShardAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.routing.ShardIterator;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.index.IndexService;
import org.elasticsearch.index.get.GetResult;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.indices.ExecutorSelector;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
public class TransportShardMultiGetAction extends TransportSingleShardAction {
private static final String ACTION_NAME = MultiGetAction.NAME + "[shard]";
private final IndicesService indicesService;
private final ExecutorSelector executorSelector;
@Inject
public TransportShardMultiGetAction(
ClusterService clusterService,
TransportService transportService,
IndicesService indicesService,
ThreadPool threadPool,
ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver,
ExecutorSelector executorSelector
) {
super(
ACTION_NAME,
threadPool,
clusterService,
transportService,
actionFilters,
indexNameExpressionResolver,
MultiGetShardRequest::new,
ThreadPool.Names.GET
);
this.indicesService = indicesService;
this.executorSelector = executorSelector;
}
@Override
protected boolean isSubAction() {
return true;
}
@Override
protected Writeable.Reader getResponseReader() {
return MultiGetShardResponse::new;
}
@Override
protected boolean resolveIndex(MultiGetShardRequest request) {
return true;
}
@Override
protected ShardIterator shards(ClusterState state, InternalRequest request) {
return clusterService.operationRouting()
.getShards(state, request.request().index(), request.request().shardId(), request.request().preference());
}
@Override
protected void asyncShardOperation(MultiGetShardRequest request, ShardId shardId, ActionListener listener)
throws IOException {
IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
IndexShard indexShard = indexService.getShard(shardId.id());
if (request.realtime()) { // we are not tied to a refresh cycle here anyway
super.asyncShardOperation(request, shardId, listener);
} else {
indexShard.awaitShardSearchActive(b -> {
try {
super.asyncShardOperation(request, shardId, listener);
} catch (Exception ex) {
listener.onFailure(ex);
}
});
}
}
@Override
protected MultiGetShardResponse shardOperation(MultiGetShardRequest request, ShardId shardId) {
IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
IndexShard indexShard = indexService.getShard(shardId.id());
if (request.refresh() && request.realtime() == false) {
indexShard.refresh("refresh_flag_mget");
}
MultiGetShardResponse response = new MultiGetShardResponse();
for (int i = 0; i < request.locations.size(); i++) {
MultiGetRequest.Item item = request.items.get(i);
try {
GetResult getResult = indexShard.getService()
.get(
item.type(),
item.id(),
item.storedFields(),
request.realtime(),
item.version(),
item.versionType(),
item.fetchSourceContext()
);
response.add(request.locations.get(i), new GetResponse(getResult));
} catch (RuntimeException e) {
if (TransportActions.isShardNotAvailableException(e)) {
throw e;
} else {
logger.debug(
() -> new ParameterizedMessage("{} failed to execute multi_get for [{}]/[{}]", shardId, item.type(), item.id()),
e
);
response.add(request.locations.get(i), new MultiGetResponse.Failure(request.index(), item.type(), item.id(), e));
}
}
}
return response;
}
@Override
protected String getExecutor(MultiGetShardRequest request, ShardId shardId) {
final ClusterState clusterState = clusterService.state();
if (clusterState.metadata().index(shardId.getIndex()).isSystem()) {
return executorSelector.executorForGet(shardId.getIndexName());
} else if (indicesService.indexServiceSafe(shardId.getIndex()).getIndexSettings().isSearchThrottled()) {
return ThreadPool.Names.SEARCH_THROTTLED;
} else {
return super.getExecutor(request, shardId);
}
}
}