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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.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.rest.action.RestActions;
import org.elasticsearch.rest.action.RestBuilderListener;
import org.elasticsearch.search.SearchRequestParsers;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.suggest.Suggest;
import org.elasticsearch.search.suggest.SuggestBuilder;
import java.io.IOException;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.POST;
import static org.elasticsearch.rest.action.RestActions.buildBroadcastShardsHeader;
public class RestSuggestAction extends BaseRestHandler {
private final SearchRequestParsers searchRequestParsers;
@Inject
public RestSuggestAction(Settings settings, RestController controller,
SearchRequestParsers searchRequestParsers) {
super(settings);
this.searchRequestParsers = searchRequestParsers;
controller.registerHandler(POST, "/_suggest", this);
controller.registerHandler(GET, "/_suggest", this);
controller.registerHandler(POST, "/{index}/_suggest", this);
controller.registerHandler(GET, "/{index}/_suggest", this);
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
final SearchRequest searchRequest = new SearchRequest(
Strings.splitStringByCommaToArray(request.param("index")), new SearchSourceBuilder());
searchRequest.indicesOptions(IndicesOptions.fromRequest(request, searchRequest.indicesOptions()));
if (RestActions.hasBodyContent(request)) {
final BytesReference sourceBytes = RestActions.getRestContent(request);
try (XContentParser parser = XContentFactory.xContent(sourceBytes).createParser(sourceBytes)) {
final QueryParseContext context = new QueryParseContext(searchRequestParsers.queryParsers, parser, parseFieldMatcher);
searchRequest.source().suggest(SuggestBuilder.fromXContent(context, searchRequestParsers.suggesters));
}
} else {
throw new IllegalArgumentException("no content or source provided to execute suggestion");
}
searchRequest.routing(request.param("routing"));
searchRequest.preference(request.param("preference"));
return channel -> client.search(searchRequest, new RestBuilderListener(channel) {
@Override
public RestResponse buildResponse(SearchResponse response, XContentBuilder builder) throws Exception {
RestStatus restStatus = RestStatus.status(response.getSuccessfulShards(),
response.getTotalShards(), response.getShardFailures());
builder.startObject();
buildBroadcastShardsHeader(builder, request, response.getTotalShards(),
response.getSuccessfulShards(), response.getFailedShards(), response.getShardFailures());
Suggest suggest = response.getSuggest();
if (suggest != null) {
suggest.toInnerXContent(builder, request);
}
builder.endObject();
return new BytesRestResponse(restStatus, builder);
}
});
}
}