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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.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.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;
@Inject
public TransportShardMultiGetAction(ClusterService clusterService, TransportService transportService,
IndicesService indicesService, ThreadPool threadPool, ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(ACTION_NAME, threadPool, clusterService, transportService, actionFilters, indexNameExpressionResolver,
MultiGetShardRequest::new, ThreadPool.Names.GET);
this.indicesService = indicesService;
}
@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()) {
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) {
IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
return indexService.getIndexSettings().isSearchThrottled() ? ThreadPool.Names.SEARCH_THROTTLED : super.getExecutor(request,
shardId);
}
}