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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.common.xcontent.StatusToXContentObject;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.RestStatus;
import java.util.function.Function;
/**
* Content listener that extracts that {@link RestStatus} from the response.
*/
public class RestStatusToXContentListener<Response extends StatusToXContentObject> extends RestToXContentListener<Response> {
private final Function<Response, String> extractLocation;
/**
* Build an instance that doesn't support responses with the status {@code 201 CREATED}.
*/
public RestStatusToXContentListener(RestChannel channel) {
this(channel, r -> {
assert false: "Returned a 201 CREATED but not set up to support a Location header";
return null;
});
}
/**
* Build an instance that does support responses with the status {@code 201 CREATED}.
*/
public RestStatusToXContentListener(RestChannel channel, Function<Response, String> extractLocation) {
super(channel);
this.extractLocation = extractLocation;
}
@Override
public RestResponse buildResponse(Response response, XContentBuilder builder) throws Exception {
assert response.isFragment() == false; //would be nice if we could make default methods final
response.toXContent(builder, channel.request());
RestResponse restResponse = new BytesRestResponse(response.status(), builder);
if (RestStatus.CREATED == restResponse.status()) {
final String location = extractLocation.apply(response);
if (location != null) {
restResponse.addHeader("Location", location);
}
}
return restResponse;
}
}