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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.ClearScrollRequest;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.RestStatusToXContentListener;
import java.io.IOException;
import java.util.Arrays;
import static org.elasticsearch.rest.RestRequest.Method.DELETE;
public class RestClearScrollAction extends BaseRestHandler {
public RestClearScrollAction(Settings settings, RestController controller) {
super(settings);
controller.registerHandler(DELETE, "/_search/scroll", this);
controller.registerHandler(DELETE, "/_search/scroll/{scroll_id}", this);
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
String scrollIds = request.param("scroll_id");
ClearScrollRequest clearRequest = new ClearScrollRequest();
clearRequest.setScrollIds(Arrays.asList(splitScrollIds(scrollIds)));
request.withContentOrSourceParamParserOrNullLenient((xContentParser -> {
if (xContentParser == null) {
if (request.hasContent()) {
// TODO: why do we accept this plain text value? maybe we can just use the scroll params?
BytesReference body = request.content();
String bodyScrollIds = body.utf8ToString();
clearRequest.setScrollIds(Arrays.asList(splitScrollIds(bodyScrollIds)));
}
} else {
// NOTE: if rest request with xcontent body has request parameters, values parsed from request body have the precedence
try {
clearRequest.fromXContent(xContentParser);
} catch (IOException e) {
throw new IllegalArgumentException("Failed to parse request body", e);
}
}
}));
return channel -> client.clearScroll(clearRequest, new RestStatusToXContentListener<>(channel));
}
@Override
public boolean supportsPlainText() {
return true;
}
private static String[] splitScrollIds(String scrollIds) {
if (scrollIds == null) {
return Strings.EMPTY_ARRAY;
}
return Strings.splitStringByCommaToArray(scrollIds);
}
}