/*
* 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.rest.action.search;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.search.SearchOperationThreading;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchScrollRequest;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.XContentRestResponse;
import org.elasticsearch.rest.XContentThrowableRestResponse;
import org.elasticsearch.search.Scroll;
import java.io.IOException;
import static org.elasticsearch.common.unit.TimeValue.*;
import static org.elasticsearch.rest.RestRequest.Method.*;
import static org.elasticsearch.rest.RestStatus.*;
import static org.elasticsearch.rest.action.support.RestXContentBuilder.*;
/**
* @author kimchy (shay.banon)
*/
public class RestSearchScrollAction extends BaseRestHandler {
@Inject public RestSearchScrollAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(GET, "/_search/scroll", this);
controller.registerHandler(POST, "/_search/scroll", this);
controller.registerHandler(GET, "/_search/scroll/{scroll_id}", this);
controller.registerHandler(POST, "/_search/scroll/{scroll_id}", this);
}
@Override public void handleRequest(final RestRequest request, final RestChannel channel) {
String scrollId = request.param("scroll_id");
if (scrollId == null && request.hasContent()) {
scrollId = request.contentAsString();
}
SearchScrollRequest searchScrollRequest = new SearchScrollRequest(scrollId);
try {
String scroll = request.param("scroll");
if (scroll != null) {
searchScrollRequest.scroll(new Scroll(parseTimeValue(scroll, null)));
}
searchScrollRequest.listenerThreaded(false);
SearchOperationThreading operationThreading = SearchOperationThreading.fromString(request.param("operation_threading"), null);
if (operationThreading != null) {
if (operationThreading == SearchOperationThreading.NO_THREADS) {
// since we don't spawn, don't allow no_threads, but change it to a single thread
operationThreading = SearchOperationThreading.SINGLE_THREAD;
}
searchScrollRequest.operationThreading(operationThreading);
}
} catch (Exception e) {
try {
XContentBuilder builder = restContentBuilder(request);
channel.sendResponse(new XContentRestResponse(request, BAD_REQUEST, builder.startObject().field("error", e.getMessage()).endObject()));
} catch (IOException e1) {
logger.error("Failed to send failure response", e1);
}
return;
}
client.searchScroll(searchScrollRequest, new ActionListener<SearchResponse>() {
@Override public void onResponse(SearchResponse response) {
try {
XContentBuilder builder = restContentBuilder(request);
builder.startObject();
response.toXContent(builder, request);
builder.endObject();
channel.sendResponse(new XContentRestResponse(request, response.status(), builder));
} catch (Exception e) {
onFailure(e);
}
}
@Override public void onFailure(Throwable e) {
try {
channel.sendResponse(new XContentThrowableRestResponse(request, e));
} catch (IOException e1) {
logger.error("Failed to send failure response", e1);
}
}
});
}
}