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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.cluster.metadata;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexClusterStateUpdateRequest;
import org.elasticsearch.cluster.AckedClusterStateUpdateTask;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.RestoreInProgress;
import org.elasticsearch.cluster.ack.ClusterStateUpdateResponse;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.set.Sets;
import org.elasticsearch.index.Index;
import org.elasticsearch.snapshots.RestoreService;
import org.elasticsearch.snapshots.SnapshotsService;
import java.util.Arrays;
import java.util.Set;
import static java.util.stream.Collectors.toSet;
/**
* Deletes indices.
*/
public class MetaDataDeleteIndexService extends AbstractComponent {
private final ClusterService clusterService;
private final AllocationService allocationService;
@Inject
public MetaDataDeleteIndexService(Settings settings, ClusterService clusterService, AllocationService allocationService) {
super(settings);
this.clusterService = clusterService;
this.allocationService = allocationService;
}
public void deleteIndices(final DeleteIndexClusterStateUpdateRequest request,
final ActionListener<ClusterStateUpdateResponse> listener) {
if (request.indices() == null || request.indices().length == 0) {
throw new IllegalArgumentException("Index name is required");
}
clusterService.submitStateUpdateTask("delete-index " + Arrays.toString(request.indices()),
new AckedClusterStateUpdateTask<ClusterStateUpdateResponse>(Priority.URGENT, request, listener) {
@Override
protected ClusterStateUpdateResponse newResponse(boolean acknowledged) {
return new ClusterStateUpdateResponse(acknowledged);
}
@Override
public ClusterState execute(final ClusterState currentState) {
return deleteIndices(currentState, Sets.newHashSet(request.indices()));
}
});
}
/**
* Delete some indices from the cluster state.
*/
public ClusterState deleteIndices(ClusterState currentState, Set<Index> indices) {
final MetaData meta = currentState.metaData();
final Set<IndexMetaData> metaDatas = indices.stream().map(i -> meta.getIndexSafe(i)).collect(toSet());
// Check if index deletion conflicts with any running snapshots
SnapshotsService.checkIndexDeletion(currentState, metaDatas);
RoutingTable.Builder routingTableBuilder = RoutingTable.builder(currentState.routingTable());
MetaData.Builder metaDataBuilder = MetaData.builder(meta);
ClusterBlocks.Builder clusterBlocksBuilder = ClusterBlocks.builder().blocks(currentState.blocks());
final IndexGraveyard.Builder graveyardBuilder = IndexGraveyard.builder(metaDataBuilder.indexGraveyard());
final int previousGraveyardSize = graveyardBuilder.tombstones().size();
for (final Index index : indices) {
String indexName = index.getName();
logger.info("{} deleting index", index);
routingTableBuilder.remove(indexName);
clusterBlocksBuilder.removeIndexBlocks(indexName);
metaDataBuilder.remove(indexName);
}
// add tombstones to the cluster state for each deleted index
final IndexGraveyard currentGraveyard = graveyardBuilder.addTombstones(indices).build(settings);
metaDataBuilder.indexGraveyard(currentGraveyard); // the new graveyard set on the metadata
logger.trace("{} tombstones purged from the cluster state. Previous tombstone size: {}. Current tombstone size: {}.",
graveyardBuilder.getNumPurged(), previousGraveyardSize, currentGraveyard.getTombstones().size());
MetaData newMetaData = metaDataBuilder.build();
ClusterBlocks blocks = clusterBlocksBuilder.build();
// update snapshot restore entries
ImmutableOpenMap<String, ClusterState.Custom> customs = currentState.getCustoms();
final RestoreInProgress restoreInProgress = currentState.custom(RestoreInProgress.TYPE);
if (restoreInProgress != null) {
RestoreInProgress updatedRestoreInProgress = RestoreService.updateRestoreStateWithDeletedIndices(restoreInProgress, indices);
if (updatedRestoreInProgress != restoreInProgress) {
ImmutableOpenMap.Builder<String, ClusterState.Custom> builder = ImmutableOpenMap.builder(customs);
builder.put(RestoreInProgress.TYPE, updatedRestoreInProgress);
customs = builder.build();
}
}
return allocationService.reroute(
ClusterState.builder(currentState)
.routingTable(routingTableBuilder.build())
.metaData(newMetaData)
.blocks(blocks)
.customs(customs)
.build(),
"deleted indices [" + indices + "]");
}
}