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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.
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package org.elasticsearch.rest.action.search;
import org.elasticsearch.action.search.SearchScrollRequest;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.RestStatusToXContentListener;
import org.elasticsearch.search.Scroll;
import java.io.IOException;
import static org.elasticsearch.common.unit.TimeValue.parseTimeValue;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.POST;
public class RestSearchScrollAction extends BaseRestHandler {
public RestSearchScrollAction(Settings settings, RestController controller) {
super(settings);
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 RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
String scrollId = request.param("scroll_id");
SearchScrollRequest searchScrollRequest = new SearchScrollRequest();
searchScrollRequest.scrollId(scrollId);
String scroll = request.param("scroll");
if (scroll != null) {
searchScrollRequest.scroll(new Scroll(parseTimeValue(scroll, null, "scroll")));
}
request.withContentOrSourceParamParserOrNull(xContentParser -> {
if (xContentParser != null) {
// NOTE: if rest request with xcontent body has request parameters, these parameters override xcontent values
try {
buildFromContent(xContentParser, searchScrollRequest);
} catch (IOException e) {
throw new IllegalArgumentException("Failed to parse request body", e);
}
}});
return channel -> client.searchScroll(searchScrollRequest, new RestStatusToXContentListener<>(channel));
}
public static void buildFromContent(XContentParser parser, SearchScrollRequest searchScrollRequest) throws IOException {
if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
throw new IllegalArgumentException("Malformed content, must start with an object");
} else {
XContentParser.Token token;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if ("scroll_id".equals(currentFieldName) && token == XContentParser.Token.VALUE_STRING) {
searchScrollRequest.scrollId(parser.text());
} else if ("scroll".equals(currentFieldName) && token == XContentParser.Token.VALUE_STRING) {
searchScrollRequest.scroll(new Scroll(TimeValue.parseTimeValue(parser.text(), null, "scroll")));
} else {
throw new IllegalArgumentException("Unknown parameter [" + currentFieldName
+ "] in request body or parameter is of the wrong type[" + token + "] ");
}
}
}
}
}