/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.search;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.TransportActions;
import org.elasticsearch.action.search.type.ParsedScrollId;
import org.elasticsearch.action.search.type.TransportSearchScrollQueryAndFetchAction;
import org.elasticsearch.action.search.type.TransportSearchScrollQueryThenFetchAction;
import org.elasticsearch.action.search.type.TransportSearchScrollScanAction;
import org.elasticsearch.action.support.BaseAction;
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 static org.elasticsearch.action.search.type.ParsedScrollId.*;
import static org.elasticsearch.action.search.type.TransportSearchHelper.*;
/**
* @author kimchy (Shay Banon)
*/
public class TransportSearchScrollAction extends BaseAction<SearchScrollRequest, SearchResponse> {
private final TransportSearchScrollQueryThenFetchAction queryThenFetchAction;
private final TransportSearchScrollQueryAndFetchAction queryAndFetchAction;
private final TransportSearchScrollScanAction scanAction;
@Inject public TransportSearchScrollAction(Settings settings, ThreadPool threadPool, TransportService transportService,
TransportSearchScrollQueryThenFetchAction queryThenFetchAction,
TransportSearchScrollQueryAndFetchAction queryAndFetchAction,
TransportSearchScrollScanAction scanAction) {
super(settings, threadPool);
this.queryThenFetchAction = queryThenFetchAction;
this.queryAndFetchAction = queryAndFetchAction;
this.scanAction = scanAction;
transportService.registerHandler(TransportActions.SEARCH_SCROLL, new TransportHandler());
}
@Override protected void doExecute(SearchScrollRequest request, ActionListener<SearchResponse> listener) {
try {
ParsedScrollId scrollId = parseScrollId(request.scrollId());
if (scrollId.type().equals(QUERY_THEN_FETCH_TYPE)) {
queryThenFetchAction.execute(request, scrollId, listener);
} else if (scrollId.type().equals(QUERY_AND_FETCH_TYPE)) {
queryAndFetchAction.execute(request, scrollId, listener);
} else if (scrollId.type().equals(SCAN)) {
scanAction.execute(request, scrollId, listener);
} else {
throw new ElasticSearchIllegalArgumentException("Scroll id type [" + scrollId.type() + "] unrecognized");
}
} catch (Exception e) {
listener.onFailure(e);
}
}
private class TransportHandler extends BaseTransportRequestHandler<SearchScrollRequest> {
@Override public SearchScrollRequest newInstance() {
return new SearchScrollRequest();
}
@Override public void messageReceived(SearchScrollRequest request, final TransportChannel channel) throws Exception {
execute(request, new ActionListener<SearchResponse>() {
@Override public void onResponse(SearchResponse result) {
try {
channel.sendResponse(result);
} catch (Exception e) {
onFailure(e);
}
}
@Override public void onFailure(Throwable e) {
try {
channel.sendResponse(e);
} catch (Exception e1) {
logger.warn("Failed to send response for search", e1);
}
}
});
}
@Override public String executor() {
return ThreadPool.Names.SAME;
}
}
}