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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.
*/
package org.elasticsearch.rest.action.search;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchScrollRequest;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentHelper;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.support.RestActions;
import org.elasticsearch.rest.action.support.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 {
@Inject
public RestSearchScrollAction(Settings settings, RestController controller, Client client) {
super(settings, controller, 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, final Client client) {
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")));
}
if (RestActions.hasBodyContent(request)) {
XContentType type = XContentFactory.xContentType(RestActions.getRestContent(request));
if (type == null) {
if (scrollId == null) {
scrollId = RestActions.getRestContent(request).toUtf8();
searchScrollRequest.scrollId(scrollId);
}
} else {
// NOTE: if rest request with xcontent body has request parameters, these parameters override xcontent values
buildFromContent(RestActions.getRestContent(request), searchScrollRequest);
}
}
client.searchScroll(searchScrollRequest, new RestStatusToXContentListener<SearchResponse>(channel));
}
public static void buildFromContent(BytesReference content, SearchScrollRequest searchScrollRequest) {
try (XContentParser parser = XContentHelper.createParser(content)) {
if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
throw new IllegalArgumentException("Malforrmed 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 + "] ");
}
}
}
} catch (IOException e) {
throw new IllegalArgumentException("Failed to parse request body", e);
}
}
}
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