/*
* 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.mlt;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.mlt.MoreLikeThisRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;
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.client.Requests.*;
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 RestMoreLikeThisAction extends BaseRestHandler {
@Inject public RestMoreLikeThisAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(GET, "/{index}/{type}/{id}/_mlt", this);
controller.registerHandler(POST, "/{index}/{type}/{id}/_mlt", this);
}
@Override public void handleRequest(final RestRequest request, final RestChannel channel) {
MoreLikeThisRequest mltRequest = moreLikeThisRequest(request.param("index")).type(request.param("type")).id(request.param("id"));
try {
mltRequest.fields(request.paramAsStringArray("mlt_fields", null));
mltRequest.percentTermsToMatch(request.paramAsFloat("percent_terms_to_match", -1));
mltRequest.minTermFreq(request.paramAsInt("min_term_freq", -1));
mltRequest.maxQueryTerms(request.paramAsInt("max_query_terms", -1));
mltRequest.stopWords(request.paramAsStringArray("stop_words", null));
mltRequest.minDocFreq(request.paramAsInt("min_doc_freq", -1));
mltRequest.maxDocFreq(request.paramAsInt("max_doc_freq", -1));
mltRequest.minWordLen(request.paramAsInt("min_word_len", -1));
mltRequest.maxWordLen(request.paramAsInt("max_word_len", -1));
mltRequest.boostTerms(request.paramAsFloat("boost_terms", -1));
mltRequest.searchType(SearchType.fromString(request.param("search_type")));
mltRequest.searchIndices(request.paramAsStringArray("search_indices", null));
mltRequest.searchTypes(request.paramAsStringArray("search_types", null));
mltRequest.searchQueryHint(request.param("search_query_hint"));
mltRequest.searchSize(request.paramAsInt("search_size", mltRequest.searchSize()));
mltRequest.searchFrom(request.paramAsInt("search_from", mltRequest.searchFrom()));
String searchScroll = request.param("search_scroll");
if (searchScroll != null) {
mltRequest.searchScroll(new Scroll(parseTimeValue(searchScroll, null)));
}
if (request.hasContent()) {
mltRequest.searchSource(request.contentByteArray(), request.contentByteArrayOffset(), request.contentLength(), request.contentUnsafe());
} else {
String searchSource = request.param("search_source");
if (searchSource != null) {
mltRequest.searchSource(searchSource);
}
}
} 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.moreLikeThis(mltRequest, 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, OK, 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);
}
}
});
}
}