org.elasticsearch.rest.action.admin.indices.template.head.RestHeadIndexTemplateAction Maven / Gradle / Ivy
/*
* 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.admin.indices.template.head;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesRequest;
import org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.*;
import static org.elasticsearch.rest.RestRequest.Method.HEAD;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;
/**
*
*/
public class RestHeadIndexTemplateAction extends BaseRestHandler {
@Inject
public RestHeadIndexTemplateAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(HEAD, "/_template/{name}", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel) {
GetIndexTemplatesRequest getIndexTemplatesRequest = new GetIndexTemplatesRequest(request.param("name"));
client.admin().indices().getTemplates(getIndexTemplatesRequest, new ActionListener() {
@Override
public void onResponse(GetIndexTemplatesResponse getIndexTemplatesResponse) {
try {
boolean templateExists = getIndexTemplatesResponse.getIndexTemplates().size() > 0;
if (templateExists) {
channel.sendResponse(new StringRestResponse(OK));
} else {
channel.sendResponse(new StringRestResponse(NOT_FOUND));
}
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(new StringRestResponse(ExceptionsHelper.status(e)));
} catch (Exception e1) {
logger.error("Failed to send failure response", e1);
}
}
});
}
}