org.elasticsearch.rest.action.admin.indices.template.get.RestGetIndexTemplateAction Maven / Gradle / Ivy
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* Licensed to Elastic Search and Shay Banon under one
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* 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
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* Unless required by applicable law or agreed to in writing,
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*/
package org.elasticsearch.rest.action.admin.indices.template.get;
import com.google.common.collect.Maps;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
import org.elasticsearch.action.admin.cluster.state.ClusterStateResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.Requests;
import org.elasticsearch.cluster.metadata.IndexTemplateMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsFilter;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestXContentBuilder;
import java.io.IOException;
import java.util.Map;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestStatus.OK;
/**
*
*/
public class RestGetIndexTemplateAction extends BaseRestHandler {
private final SettingsFilter settingsFilter;
@Inject
public RestGetIndexTemplateAction(Settings settings, Client client, RestController controller,
SettingsFilter settingsFilter) {
super(settings, client);
this.settingsFilter = settingsFilter;
controller.registerHandler(GET, "/_template/{name}", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel) {
ClusterStateRequest clusterStateRequest = Requests.clusterStateRequest()
.filterRoutingTable(true)
.filterNodes(true)
.filteredIndexTemplates(request.param("name"))
.filterOutIndices();
clusterStateRequest.listenerThreaded(false);
client.admin().cluster().state(clusterStateRequest, new ActionListener() {
@Override
public void onResponse(ClusterStateResponse response) {
Map paramsMap = Maps.newHashMap();
paramsMap.put("reduce_mappings", "true");
ToXContent.Params params = new ToXContent.DelegatingMapParams(paramsMap, request);
try {
MetaData metaData = response.getState().metaData();
XContentBuilder builder = RestXContentBuilder.restContentBuilder(request);
builder.startObject();
for (IndexTemplateMetaData indexMetaData : metaData.templates().values()) {
IndexTemplateMetaData.Builder.toXContent(indexMetaData, builder, params);
}
builder.endObject();
channel.sendResponse(new XContentRestResponse(request, OK, builder));
} catch (Throwable 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);
}
}
});
}
}