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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;
import org.elasticsearch.action.fieldstats.FieldStats;
import org.elasticsearch.action.fieldstats.FieldStatsRequest;
import org.elasticsearch.action.fieldstats.FieldStatsResponse;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
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 java.io.IOException;
import java.util.Map;
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 RestFieldStatsAction extends BaseRestHandler {
public RestFieldStatsAction(Settings settings, RestController controller) {
super(settings);
controller.registerAsDeprecatedHandler(GET, "/_field_stats", this,
deprecationMessage(), deprecationLogger);
controller.registerAsDeprecatedHandler(POST, "/_field_stats", this,
deprecationMessage(), deprecationLogger);
controller.registerAsDeprecatedHandler(GET, "/{index}/_field_stats", this,
deprecationMessage(), deprecationLogger);
controller.registerAsDeprecatedHandler(POST, "/{index}/_field_stats", this,
deprecationMessage(), deprecationLogger);
}
static String deprecationMessage() {
return "[_field_stats] endpoint is deprecated! Use [_field_caps] instead or " +
"run a min/max aggregations on the desired fields.";
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request,
final NodeClient client) throws IOException {
if (request.hasContentOrSourceParam() && request.hasParam("fields")) {
throw new IllegalArgumentException("can't specify a request body and [fields] request parameter, " +
"either specify a request body or the [fields] request parameter");
}
final FieldStatsRequest fieldStatsRequest = new FieldStatsRequest();
fieldStatsRequest.indices(Strings.splitStringByCommaToArray(request.param("index")));
fieldStatsRequest.indicesOptions(IndicesOptions.fromRequest(request, fieldStatsRequest.indicesOptions()));
fieldStatsRequest.level(request.param("level", FieldStatsRequest.DEFAULT_LEVEL));
if (request.hasContentOrSourceParam()) {
try (XContentParser parser = request.contentOrSourceParamParser()) {
fieldStatsRequest.source(parser);
}
} else {
fieldStatsRequest.setFields(Strings.splitStringByCommaToArray(request.param("fields")));
}
return channel -> client.fieldStats(fieldStatsRequest, new RestBuilderListener<FieldStatsResponse>(channel) {
@Override
public RestResponse buildResponse(FieldStatsResponse response, XContentBuilder builder) throws Exception {
builder.startObject();
buildBroadcastShardsHeader(builder, request, response);
builder.startObject("indices");
for (Map.Entry<String, Map<String, FieldStats>> entry1 :
response.getIndicesMergedFieldStats().entrySet()) {
builder.startObject(entry1.getKey());
builder.startObject("fields");
for (Map.Entry<String, FieldStats> entry2 : entry1.getValue().entrySet()) {
builder.field(entry2.getKey());
entry2.getValue().toXContent(builder, request);
}
builder.endObject();
builder.endObject();
}
builder.endObject();
if (response.getConflicts().size() > 0) {
builder.startObject("conflicts");
for (Map.Entry<String, String> entry : response.getConflicts().entrySet()) {
builder.field(entry.getKey(), entry.getValue());
}
builder.endObject();
}
builder.endObject();
return new BytesRestResponse(RestStatus.OK, builder);
}
});
}
}