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Elasticsearch subproject :server
/*
* 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.action.RoutingMissingException;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.single.shard.TransportSingleShardAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.routing.Preference;
import org.elasticsearch.cluster.routing.ShardIterator;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
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;
/**
* Performs the get operation.
*/
public class TransportGetAction extends TransportSingleShardAction {
private final IndicesService indicesService;
@Inject
public TransportGetAction(Settings settings, ClusterService clusterService, TransportService transportService,
IndicesService indicesService, ThreadPool threadPool, ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, GetAction.NAME, threadPool, clusterService, transportService, actionFilters, indexNameExpressionResolver,
GetRequest::new, ThreadPool.Names.GET);
this.indicesService = indicesService;
}
@Override
protected boolean resolveIndex(GetRequest request) {
return true;
}
@Override
protected ShardIterator shards(ClusterState state, InternalRequest request) {
return clusterService.operationRouting()
.getShards(clusterService.state(), request.concreteIndex(), request.request().id(), request.request().routing(), request.request().preference());
}
@Override
protected void resolveRequest(ClusterState state, InternalRequest request) {
IndexMetaData indexMeta = state.getMetaData().index(request.concreteIndex());
if (request.request().realtime && // if the realtime flag is set
request.request().preference() == null && // the preference flag is not already set
indexMeta != null && // and we have the index
IndexMetaData.isIndexUsingShadowReplicas(indexMeta.getSettings())) { // and the index uses shadow replicas
// set the preference for the request to use "_primary" automatically
request.request().preference(Preference.PRIMARY.type());
}
// update the routing (request#index here is possibly an alias)
request.request().routing(state.metaData().resolveIndexRouting(request.request().parent(), request.request().routing(), request.request().index()));
// Fail fast on the node that received the request.
if (request.request().routing() == null && state.getMetaData().routingRequired(request.concreteIndex(), request.request().type())) {
throw new RoutingMissingException(request.concreteIndex(), request.request().type(), request.request().id());
}
}
@Override
protected GetResponse shardOperation(GetRequest request, ShardId shardId) {
IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
IndexShard indexShard = indexService.getShard(shardId.id());
if (request.refresh() && !request.realtime()) {
indexShard.refresh("refresh_flag_get");
}
GetResult result = indexShard.getService().get(request.type(), request.id(), request.storedFields(),
request.realtime(), request.version(), request.versionType(), request.fetchSourceContext());
return new GetResponse(result);
}
@Override
protected GetResponse newResponse() {
return new GetResponse();
}
}