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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.elasticsearch.ElasticsearchException;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.action.support.TransportActions;
import org.elasticsearch.action.support.single.shard.TransportShardSingleOperationAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.routing.ShardIterator;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.VersionType;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.get.GetResult;
import org.elasticsearch.index.service.IndexService;
import org.elasticsearch.index.shard.service.IndexShard;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.search.fetch.source.FetchSourceContext;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
public class TransportShardMultiGetAction extends TransportShardSingleOperationAction {
private final IndicesService indicesService;
private final boolean realtime;
@Inject
public TransportShardMultiGetAction(Settings settings, ClusterService clusterService, TransportService transportService,
IndicesService indicesService, ThreadPool threadPool) {
super(settings, threadPool, clusterService, transportService);
this.indicesService = indicesService;
this.realtime = settings.getAsBoolean("action.get.realtime", true);
}
@Override
protected String executor() {
return ThreadPool.Names.GET;
}
@Override
protected String transportAction() {
return MultiGetAction.NAME + "/shard";
}
@Override
protected MultiGetShardRequest newRequest() {
return new MultiGetShardRequest();
}
@Override
protected MultiGetShardResponse newResponse() {
return new MultiGetShardResponse();
}
@Override
protected ClusterBlockException checkGlobalBlock(ClusterState state, MultiGetShardRequest request) {
return state.blocks().globalBlockedException(ClusterBlockLevel.READ);
}
@Override
protected ClusterBlockException checkRequestBlock(ClusterState state, MultiGetShardRequest request) {
return state.blocks().indexBlockedException(ClusterBlockLevel.READ, request.index());
}
@Override
protected ShardIterator shards(ClusterState state, MultiGetShardRequest request) {
return clusterService.operationRouting()
.getShards(clusterService.state(), request.index(), request.shardId(), request.preference());
}
@Override
protected void resolveRequest(ClusterState state, MultiGetShardRequest request) {
if (request.realtime == null) {
request.realtime = this.realtime;
}
// no need to set concrete index and routing here, it has already been set by the multi get action on the item
//request.index(state.metaData().concreteIndex(request.index()));
}
@Override
protected MultiGetShardResponse shardOperation(MultiGetShardRequest request, int shardId) throws ElasticsearchException {
IndexService indexService = indicesService.indexServiceSafe(request.index());
IndexShard indexShard = indexService.shardSafe(shardId);
if (request.refresh() && !request.realtime()) {
indexShard.refresh(new Engine.Refresh("refresh_flag_mget").force(TransportGetAction.REFRESH_FORCE));
}
MultiGetShardResponse response = new MultiGetShardResponse();
for (int i = 0; i < request.locations.size(); i++) {
String type = request.types.get(i);
String id = request.ids.get(i);
String[] fields = request.fields.get(i);
long version = request.versions.get(i);
VersionType versionType = request.versionTypes.get(i);
if (versionType == null) {
versionType = VersionType.INTERNAL;
}
FetchSourceContext fetchSourceContext = request.fetchSourceContexts.get(i);
try {
GetResult getResult = indexShard.getService().get(type, id, fields, request.realtime(), version, versionType, fetchSourceContext);
response.add(request.locations.get(i), new GetResponse(getResult));
} catch (Throwable t) {
if (TransportActions.isShardNotAvailableException(t)) {
throw (ElasticsearchException) t;
} else {
logger.debug("[{}][{}] failed to execute multi_get for [{}]/[{}]", t, request.index(), shardId, type, id);
response.add(request.locations.get(i), new MultiGetResponse.Failure(request.index(), type, id, ExceptionsHelper.detailedMessage(t)));
}
}
}
return response;
}
}