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/*
* Licensed to ElasticSearch and Shay Banon 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.ExceptionsHelper;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.TransportAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.BaseTransportRequestHandler;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportService;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
public class TransportMultiGetAction extends TransportAction {
private final ClusterService clusterService;
private final TransportShardMultiGetAction shardAction;
@Inject
public TransportMultiGetAction(Settings settings, ThreadPool threadPool, TransportService transportService, ClusterService clusterService, TransportShardMultiGetAction shardAction) {
super(settings, threadPool);
this.clusterService = clusterService;
this.shardAction = shardAction;
transportService.registerHandler(MultiGetAction.NAME, new TransportHandler());
}
@Override
protected void doExecute(final MultiGetRequest request, final ActionListener listener) {
ClusterState clusterState = clusterService.state();
clusterState.blocks().globalBlockedRaiseException(ClusterBlockLevel.READ);
Map shardRequests = new HashMap();
for (int i = 0; i < request.items.size(); i++) {
MultiGetRequest.Item item = request.items.get(i);
item.routing(clusterState.metaData().resolveIndexRouting(item.routing(), item.index()));
item.index(clusterState.metaData().concreteIndex(item.index()));
ShardId shardId = clusterService.operationRouting()
.getShards(clusterState, item.index(), item.type(), item.id(), item.routing(), null).shardId();
MultiGetShardRequest shardRequest = shardRequests.get(shardId);
if (shardRequest == null) {
shardRequest = new MultiGetShardRequest(shardId.index().name(), shardId.id());
shardRequest.preference(request.preference);
shardRequest.realtime(request.realtime);
shardRequest.refresh(request.refresh);
shardRequests.put(shardId, shardRequest);
}
shardRequest.add(i, item.type(), item.id(), item.fields());
}
final MultiGetItemResponse[] responses = new MultiGetItemResponse[request.items.size()];
final AtomicInteger counter = new AtomicInteger(shardRequests.size());
for (final MultiGetShardRequest shardRequest : shardRequests.values()) {
shardAction.execute(shardRequest, new ActionListener() {
@Override
public void onResponse(MultiGetShardResponse response) {
synchronized (responses) {
for (int i = 0; i < response.locations.size(); i++) {
responses[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
String message = ExceptionsHelper.detailedMessage(e);
synchronized (responses) {
for (int i = 0; i < shardRequest.locations.size(); i++) {
responses[shardRequest.locations.get(i)] = new MultiGetItemResponse(null,
new MultiGetResponse.Failure(shardRequest.index(), shardRequest.types.get(i), shardRequest.ids.get(i), message));
}
}
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
private void finishHim() {
listener.onResponse(new MultiGetResponse(responses));
}
});
}
}
class TransportHandler extends BaseTransportRequestHandler {
@Override
public MultiGetRequest newInstance() {
return new MultiGetRequest();
}
@Override
public void messageReceived(final MultiGetRequest request, final TransportChannel channel) throws Exception {
// no need to use threaded listener, since we just send a response
request.listenerThreaded(false);
execute(request, new ActionListener() {
@Override
public void onResponse(MultiGetResponse response) {
try {
channel.sendResponse(response);
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(e);
} catch (Exception e1) {
logger.warn("Failed to send error response for action [" + MultiGetAction.NAME + "] and request [" + request + "]", e1);
}
}
});
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
}
}
