org.elasticsearch.rest.action.admin.indices.mapping.get.RestGetMappingAction Maven / Gradle / Ivy
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* Licensed to ElasticSearch and Shay Banon under one
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* 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,
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* specific language governing permissions and limitations
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package org.elasticsearch.rest.action.admin.indices.mapping.get;
import com.google.common.collect.ImmutableSet;
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.IndexMetaData;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.Index;
import org.elasticsearch.indices.IndexMissingException;
import org.elasticsearch.indices.TypeMissingException;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestXContentBuilder;
import java.io.IOException;
import java.util.Set;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;
import static org.elasticsearch.rest.action.support.RestActions.splitIndices;
import static org.elasticsearch.rest.action.support.RestActions.splitTypes;
/**
*
*/
public class RestGetMappingAction extends BaseRestHandler {
@Inject
public RestGetMappingAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(GET, "/_mapping", this);
controller.registerHandler(GET, "/{index}/_mapping", this);
controller.registerHandler(GET, "/{index}/{type}/_mapping", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel) {
final String[] indices = splitIndices(request.param("index"));
final Set types = ImmutableSet.copyOf(splitTypes(request.param("type")));
ClusterStateRequest clusterStateRequest = Requests.clusterStateRequest()
.filterRoutingTable(true)
.filterNodes(true)
.filteredIndices(indices);
clusterStateRequest.listenerThreaded(false);
client.admin().cluster().state(clusterStateRequest, new ActionListener() {
@Override
public void onResponse(ClusterStateResponse response) {
try {
boolean foundAny = false;
MetaData metaData = response.getState().metaData();
XContentBuilder builder = RestXContentBuilder.restContentBuilder(request);
builder.startObject();
if (indices.length == 1 && metaData.indices().isEmpty()) {
channel.sendResponse(new XContentThrowableRestResponse(request, new IndexMissingException(new Index(indices[0]))));
return;
}
if (indices.length == 1 && types.size() == 1) {
boolean foundType = false;
IndexMetaData indexMetaData = metaData.iterator().next();
for (MappingMetaData mappingMd : indexMetaData.mappings().values()) {
if (!types.isEmpty() && !types.contains(mappingMd.type())) {
// filter this type out...
continue;
}
foundAny = true;
foundType = true;
builder.field(mappingMd.type());
builder.map(mappingMd.sourceAsMap());
}
if (!foundType) {
channel.sendResponse(new XContentThrowableRestResponse(request, new TypeMissingException(new Index(indices[0]), types.iterator().next())));
return;
}
} else {
for (IndexMetaData indexMetaData : metaData) {
builder.startObject(indexMetaData.index(), XContentBuilder.FieldCaseConversion.NONE);
for (MappingMetaData mappingMd : indexMetaData.mappings().values()) {
if (!types.isEmpty() && !types.contains(mappingMd.type())) {
// filter this type out...
continue;
}
foundAny = true;
builder.field(mappingMd.type());
builder.map(mappingMd.sourceAsMap());
}
if (indexMetaData.mappings().values().isEmpty() && types.isEmpty()) {
// if no types are specified and no mappings are set for the index, consider this an empty mapping
foundAny = true;
}
builder.endObject();
}
}
builder.endObject();
channel.sendResponse(new XContentRestResponse(request, foundAny || indices.length == 0 ? OK : NOT_FOUND, 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);
}
}
});
}
}