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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.alias;
import com.google.common.collect.Sets;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest.AliasActions;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeOperationAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ack.ClusterStateUpdateResponse;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.AliasAction;
import org.elasticsearch.cluster.metadata.MetaDataIndexAliasesService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.action.admin.indices.alias.delete.AliasesMissingException;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Add/remove aliases action
*/
public class TransportIndicesAliasesAction extends TransportMasterNodeOperationAction<IndicesAliasesRequest, IndicesAliasesResponse> {
private final MetaDataIndexAliasesService indexAliasesService;
@Inject
public TransportIndicesAliasesAction(Settings settings, TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, MetaDataIndexAliasesService indexAliasesService, ActionFilters actionFilters) {
super(settings, IndicesAliasesAction.NAME, transportService, clusterService, threadPool, actionFilters);
this.indexAliasesService = indexAliasesService;
}
@Override
protected String executor() {
// we go async right away...
return ThreadPool.Names.SAME;
}
@Override
protected IndicesAliasesRequest newRequest() {
return new IndicesAliasesRequest();
}
@Override
protected IndicesAliasesResponse newResponse() {
return new IndicesAliasesResponse();
}
@Override
protected ClusterBlockException checkBlock(IndicesAliasesRequest request, ClusterState state) {
Set<String> indices = Sets.newHashSet();
for (AliasActions aliasAction : request.aliasActions()) {
for (String index : aliasAction.indices()) {
indices.add(index);
}
}
return state.blocks().indicesBlockedException(ClusterBlockLevel.METADATA, indices.toArray(new String[indices.size()]));
}
@Override
protected void masterOperation(final IndicesAliasesRequest request, final ClusterState state, final ActionListener<IndicesAliasesResponse> listener) throws ElasticsearchException {
//Expand the indices names
List<AliasActions> actions = request.aliasActions();
List<AliasAction> finalActions = new ArrayList<>();
boolean hasOnlyDeletesButNoneCanBeDone = true;
Set<String> aliases = new HashSet<>();
for (AliasActions action : actions) {
//expand indices
String[] concreteIndices = state.metaData().concreteIndices(request.indicesOptions(), action.indices());
//collect the aliases
for (String alias : action.aliases()) {
aliases.add(alias);
}
for (String index : concreteIndices) {
for (String alias : action.concreteAliases(state.metaData(), index)) {
AliasAction finalAction = new AliasAction(action.aliasAction());
finalAction.index(index);
finalAction.alias(alias);
finalActions.add(finalAction);
//if there is only delete requests, none will be added if the types do not map to any existing type
hasOnlyDeletesButNoneCanBeDone = false;
}
}
}
if (hasOnlyDeletesButNoneCanBeDone && actions.size() != 0) {
throw new AliasesMissingException(aliases.toArray(new String[aliases.size()]));
}
request.aliasActions().clear();
IndicesAliasesClusterStateUpdateRequest updateRequest = new IndicesAliasesClusterStateUpdateRequest()
.ackTimeout(request.timeout()).masterNodeTimeout(request.masterNodeTimeout())
.actions(finalActions.toArray(new AliasAction[finalActions.size()]));
indexAliasesService.indicesAliases(updateRequest, new ActionListener<ClusterStateUpdateResponse>() {
@Override
public void onResponse(ClusterStateUpdateResponse response) {
listener.onResponse(new IndicesAliasesResponse(response.isAcknowledged()));
}
@Override
public void onFailure(Throwable t) {
logger.debug("failed to perform aliases", t);
listener.onFailure(t);
}
});
}
}