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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.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.HandledTransportAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.index.IndexNotFoundException;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
public class TransportMultiGetAction extends HandledTransportAction<MultiGetRequest, MultiGetResponse> {
private final ClusterService clusterService;
private final TransportShardMultiGetAction shardAction;
@Inject
public TransportMultiGetAction(Settings settings, ThreadPool threadPool, TransportService transportService,
ClusterService clusterService, TransportShardMultiGetAction shardAction,
ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, MultiGetAction.NAME, threadPool, transportService, actionFilters, indexNameExpressionResolver, MultiGetRequest::new);
this.clusterService = clusterService;
this.shardAction = shardAction;
}
@Override
protected void doExecute(final MultiGetRequest request, final ActionListener<MultiGetResponse> listener) {
ClusterState clusterState = clusterService.state();
clusterState.blocks().globalBlockedRaiseException(ClusterBlockLevel.READ);
final AtomicArray<MultiGetItemResponse> responses = new AtomicArray<>(request.items.size());
Map<ShardId, MultiGetShardRequest> shardRequests = new HashMap<>();
for (int i = 0; i < request.items.size(); i++) {
MultiGetRequest.Item item = request.items.get(i);
if (!clusterState.metaData().hasConcreteIndex(item.index())) {
responses.set(i, new MultiGetItemResponse(null, new MultiGetResponse.Failure(item.index(), item.type(), item.id(), new IndexNotFoundException(item.index()))));
continue;
}
item.routing(clusterState.metaData().resolveIndexRouting(item.parent(), item.routing(), item.index()));
String concreteSingleIndex = indexNameExpressionResolver.concreteSingleIndex(clusterState, item);
if (item.routing() == null && clusterState.getMetaData().routingRequired(concreteSingleIndex, item.type())) {
responses.set(i, new MultiGetItemResponse(null, new MultiGetResponse.Failure(concreteSingleIndex, item.type(), item.id(),
new IllegalArgumentException("routing is required for [" + concreteSingleIndex + "]/[" + item.type() + "]/[" + item.id() + "]"))));
continue;
}
ShardId shardId = clusterService.operationRouting()
.getShards(clusterState, concreteSingleIndex, item.type(), item.id(), item.routing(), null).shardId();
MultiGetShardRequest shardRequest = shardRequests.get(shardId);
if (shardRequest == null) {
shardRequest = new MultiGetShardRequest(request, shardId.index().name(), shardId.id());
shardRequests.put(shardId, shardRequest);
}
shardRequest.add(i, item);
}
if (shardRequests.size() == 0) {
// only failures..
listener.onResponse(new MultiGetResponse(responses.toArray(new MultiGetItemResponse[responses.length()])));
}
final AtomicInteger counter = new AtomicInteger(shardRequests.size());
for (final MultiGetShardRequest shardRequest : shardRequests.values()) {
shardAction.execute(shardRequest, new ActionListener<MultiGetShardResponse>() {
@Override
public void onResponse(MultiGetShardResponse response) {
for (int i = 0; i < response.locations.size(); i++) {
responses.set(response.locations.get(i), new MultiGetItemResponse(response.responses.get(i), response.failures.get(i)));
}
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
@Override
public void onFailure(Throwable e) {
// create failures for all relevant requests
for (int i = 0; i < shardRequest.locations.size(); i++) {
MultiGetRequest.Item item = shardRequest.items.get(i);
responses.set(shardRequest.locations.get(i), new MultiGetItemResponse(null,
new MultiGetResponse.Failure(shardRequest.index(), item.type(), item.id(), e)));
}
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
private void finishHim() {
listener.onResponse(new MultiGetResponse(responses.toArray(new MultiGetItemResponse[responses.length()])));
}
});
}
}
}
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