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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.action.admin.indices.get;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.get.GetIndexRequest.Feature;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.info.TransportClusterInfoAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.AliasMetaData;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.List;
/**
* Get index action.
*/
public class TransportGetIndexAction extends TransportClusterInfoAction<GetIndexRequest, GetIndexResponse> {
@Inject
public TransportGetIndexAction(Settings settings, TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, GetIndexAction.NAME, transportService, clusterService, threadPool, actionFilters, indexNameExpressionResolver, GetIndexRequest::new);
}
@Override
protected String executor() {
// very lightweight operation, no need to fork
return ThreadPool.Names.SAME;
}
@Override
protected ClusterBlockException checkBlock(GetIndexRequest request, ClusterState state) {
return state.blocks().indicesBlockedException(ClusterBlockLevel.METADATA_READ, indexNameExpressionResolver.concreteIndexNames(state, request));
}
@Override
protected GetIndexResponse newResponse() {
return new GetIndexResponse();
}
@Override
protected void doMasterOperation(final GetIndexRequest request, String[] concreteIndices, final ClusterState state,
final ActionListener<GetIndexResponse> listener) {
ImmutableOpenMap<String, ImmutableOpenMap<String, MappingMetaData>> mappingsResult = ImmutableOpenMap.of();
ImmutableOpenMap<String, List<AliasMetaData>> aliasesResult = ImmutableOpenMap.of();
ImmutableOpenMap<String, Settings> settings = ImmutableOpenMap.of();
Feature[] features = request.features();
boolean doneAliases = false;
boolean doneMappings = false;
boolean doneSettings = false;
for (Feature feature : features) {
switch (feature) {
case MAPPINGS:
if (!doneMappings) {
mappingsResult = state.metaData().findMappings(concreteIndices, request.types());
doneMappings = true;
}
break;
case ALIASES:
if (!doneAliases) {
aliasesResult = state.metaData().findAliases(Strings.EMPTY_ARRAY, concreteIndices);
doneAliases = true;
}
break;
case SETTINGS:
if (!doneSettings) {
ImmutableOpenMap.Builder<String, Settings> settingsMapBuilder = ImmutableOpenMap.builder();
for (String index : concreteIndices) {
Settings indexSettings = state.metaData().index(index).getSettings();
if (request.humanReadable()) {
indexSettings = IndexMetaData.addHumanReadableSettings(indexSettings);
}
settingsMapBuilder.put(index, indexSettings);
}
settings = settingsMapBuilder.build();
doneSettings = true;
}
break;
default:
throw new IllegalStateException("feature [" + feature + "] is not valid");
}
}
listener.onResponse(new GetIndexResponse(concreteIndices, mappingsResult, aliasesResult, settings));
}
}