org.elasticsearch.action.admin.indices.alias.TransportIndicesAliasesAction Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.carrotsearch.hppc.cursors.ObjectCursor;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.RequestValidators;
import org.elasticsearch.action.admin.indices.alias.IndicesAliasesRequest.AliasActions;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
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.AliasMetaData;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.metadata.MetaDataIndexAliasesService;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.index.Index;
import org.elasticsearch.rest.action.admin.indices.AliasesNotFoundException;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import static java.util.Collections.unmodifiableList;
/**
* Add/remove aliases action
*/
public class TransportIndicesAliasesAction extends TransportMasterNodeAction {
private static final Logger logger = LogManager.getLogger(TransportIndicesAliasesAction.class);
private final MetaDataIndexAliasesService indexAliasesService;
private final RequestValidators requestValidators;
@Inject
public TransportIndicesAliasesAction(
final TransportService transportService,
final ClusterService clusterService,
final ThreadPool threadPool,
final MetaDataIndexAliasesService indexAliasesService,
final ActionFilters actionFilters,
final IndexNameExpressionResolver indexNameExpressionResolver,
final RequestValidators requestValidators) {
super(IndicesAliasesAction.NAME, transportService, clusterService, threadPool, actionFilters, IndicesAliasesRequest::new,
indexNameExpressionResolver);
this.indexAliasesService = indexAliasesService;
this.requestValidators = Objects.requireNonNull(requestValidators);
}
@Override
protected String executor() {
// we go async right away...
return ThreadPool.Names.SAME;
}
@Override
protected AcknowledgedResponse read(StreamInput in) throws IOException {
return new AcknowledgedResponse(in);
}
@Override
protected ClusterBlockException checkBlock(IndicesAliasesRequest request, ClusterState state) {
Set indices = new HashSet<>();
for (AliasActions aliasAction : request.aliasActions()) {
Collections.addAll(indices, aliasAction.indices());
}
return state.blocks().indicesBlockedException(ClusterBlockLevel.METADATA_WRITE, indices.toArray(new String[indices.size()]));
}
@Override
protected void masterOperation(final IndicesAliasesRequest request, final ClusterState state,
final ActionListener listener) {
//Expand the indices names
List actions = request.aliasActions();
List finalActions = new ArrayList<>();
// Resolve all the AliasActions into AliasAction instances and gather all the aliases
Set aliases = new HashSet<>();
for (AliasActions action : actions) {
final Index[] concreteIndices = indexNameExpressionResolver.concreteIndices(state, request.indicesOptions(), action.indices());
final Optional maybeException = requestValidators.validateRequest(request, state, concreteIndices);
if (maybeException.isPresent()) {
listener.onFailure(maybeException.get());
return;
}
Collections.addAll(aliases, action.getOriginalAliases());
for (final Index index : concreteIndices) {
switch (action.actionType()) {
case ADD:
for (String alias : concreteAliases(action, state.metaData(), index.getName())) {
finalActions.add(new AliasAction.Add(index.getName(), alias, action.filter(), action.indexRouting(),
action.searchRouting(), action.writeIndex()));
}
break;
case REMOVE:
for (String alias : concreteAliases(action, state.metaData(), index.getName())) {
finalActions.add(new AliasAction.Remove(index.getName(), alias));
}
break;
case REMOVE_INDEX:
finalActions.add(new AliasAction.RemoveIndex(index.getName()));
break;
default:
throw new IllegalArgumentException("Unsupported action [" + action.actionType() + "]");
}
}
}
if (finalActions.isEmpty() && false == actions.isEmpty()) {
throw new AliasesNotFoundException(aliases.toArray(new String[aliases.size()]));
}
request.aliasActions().clear();
IndicesAliasesClusterStateUpdateRequest updateRequest = new IndicesAliasesClusterStateUpdateRequest(unmodifiableList(finalActions))
.ackTimeout(request.timeout()).masterNodeTimeout(request.masterNodeTimeout());
indexAliasesService.indicesAliases(updateRequest, new ActionListener() {
@Override
public void onResponse(ClusterStateUpdateResponse response) {
listener.onResponse(new AcknowledgedResponse(response.isAcknowledged()));
}
@Override
public void onFailure(Exception t) {
logger.debug("failed to perform aliases", t);
listener.onFailure(t);
}
});
}
private static String[] concreteAliases(AliasActions action, MetaData metaData, String concreteIndex) {
if (action.expandAliasesWildcards()) {
//for DELETE we expand the aliases
String[] indexAsArray = {concreteIndex};
ImmutableOpenMap> aliasMetaData = metaData.findAliases(action, indexAsArray);
List finalAliases = new ArrayList<>();
for (ObjectCursor> curAliases : aliasMetaData.values()) {
for (AliasMetaData aliasMeta: curAliases.value) {
finalAliases.add(aliasMeta.alias());
}
}
return finalAliases.toArray(new String[finalAliases.size()]);
} else {
//for ADD and REMOVE_INDEX we just return the current aliases
return action.aliases();
}
}
}