org.elasticsearch.action.search.TransportMultiSearchAction Maven / Gradle / Ivy
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* 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
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* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.action.search;
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.threadpool.ThreadPool;
import org.elasticsearch.transport.BaseTransportRequestHandler;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportService;
import java.util.concurrent.atomic.AtomicInteger;
/**
*/
public class TransportMultiSearchAction extends TransportAction {
private final ClusterService clusterService;
private final TransportSearchAction searchAction;
@Inject
public TransportMultiSearchAction(Settings settings, ThreadPool threadPool, TransportService transportService, ClusterService clusterService, TransportSearchAction searchAction) {
super(settings, threadPool);
this.clusterService = clusterService;
this.searchAction = searchAction;
transportService.registerHandler(MultiSearchAction.NAME, new TransportHandler());
}
@Override
protected void doExecute(final MultiSearchRequest request, final ActionListener listener) {
ClusterState clusterState = clusterService.state();
clusterState.blocks().globalBlockedRaiseException(ClusterBlockLevel.READ);
final MultiSearchResponse.Item[] responses = new MultiSearchResponse.Item[request.requests().size()];
final AtomicInteger counter = new AtomicInteger(responses.length);
for (int i = 0; i < responses.length; i++) {
final int index = i;
searchAction.execute(request.requests().get(i), new ActionListener() {
@Override
public void onResponse(SearchResponse searchResponse) {
synchronized (responses) {
responses[index] = new MultiSearchResponse.Item(searchResponse, null);
}
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
@Override
public void onFailure(Throwable e) {
synchronized (responses) {
responses[index] = new MultiSearchResponse.Item(null, ExceptionsHelper.detailedMessage(e));
}
if (counter.decrementAndGet() == 0) {
finishHim();
}
}
private void finishHim() {
listener.onResponse(new MultiSearchResponse(responses));
}
});
}
}
class TransportHandler extends BaseTransportRequestHandler {
@Override
public MultiSearchRequest newInstance() {
return new MultiSearchRequest();
}
@Override
public void messageReceived(final MultiSearchRequest 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(MultiSearchResponse 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 [msearch] and request [" + request + "]", e1);
}
}
});
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
}
}