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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.cluster.snapshots.get;
import org.apache.lucene.util.CollectionUtil;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.PlainActionFuture;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.repositories.IndexId;
import org.elasticsearch.repositories.RepositoryData;
import org.elasticsearch.snapshots.SnapshotId;
import org.elasticsearch.snapshots.SnapshotInfo;
import org.elasticsearch.snapshots.SnapshotMissingException;
import org.elasticsearch.snapshots.SnapshotsService;
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.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Transport Action for get snapshots operation
*/
public class TransportGetSnapshotsAction extends TransportMasterNodeAction {
private final SnapshotsService snapshotsService;
@Inject
public TransportGetSnapshotsAction(TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, SnapshotsService snapshotsService, ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(GetSnapshotsAction.NAME, transportService, clusterService, threadPool, actionFilters,
GetSnapshotsRequest::new, indexNameExpressionResolver);
this.snapshotsService = snapshotsService;
}
@Override
protected String executor() {
return ThreadPool.Names.GENERIC;
}
@Override
protected GetSnapshotsResponse read(StreamInput in) throws IOException {
return new GetSnapshotsResponse(in);
}
@Override
protected ClusterBlockException checkBlock(GetSnapshotsRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_READ);
}
@Override
protected void masterOperation(final GetSnapshotsRequest request, final ClusterState state,
final ActionListener listener) {
try {
final String repository = request.repository();
final Map allSnapshotIds = new HashMap<>();
final List currentSnapshots = new ArrayList<>();
for (SnapshotInfo snapshotInfo : snapshotsService.currentSnapshots(repository)) {
SnapshotId snapshotId = snapshotInfo.snapshotId();
allSnapshotIds.put(snapshotId.getName(), snapshotId);
currentSnapshots.add(snapshotInfo);
}
final RepositoryData repositoryData;
if (isCurrentSnapshotsOnly(request.snapshots()) == false) {
repositoryData = PlainActionFuture.get(fut -> snapshotsService.getRepositoryData(repository, fut));
for (SnapshotId snapshotId : repositoryData.getSnapshotIds()) {
allSnapshotIds.put(snapshotId.getName(), snapshotId);
}
} else {
repositoryData = null;
}
final Set toResolve = new HashSet<>();
if (isAllSnapshots(request.snapshots())) {
toResolve.addAll(allSnapshotIds.values());
} else {
for (String snapshotOrPattern : request.snapshots()) {
if (GetSnapshotsRequest.CURRENT_SNAPSHOT.equalsIgnoreCase(snapshotOrPattern)) {
toResolve.addAll(currentSnapshots.stream().map(SnapshotInfo::snapshotId).collect(Collectors.toList()));
} else if (Regex.isSimpleMatchPattern(snapshotOrPattern) == false) {
if (allSnapshotIds.containsKey(snapshotOrPattern)) {
toResolve.add(allSnapshotIds.get(snapshotOrPattern));
} else if (request.ignoreUnavailable() == false) {
throw new SnapshotMissingException(repository, snapshotOrPattern);
}
} else {
for (Map.Entry entry : allSnapshotIds.entrySet()) {
if (Regex.simpleMatch(snapshotOrPattern, entry.getKey())) {
toResolve.add(entry.getValue());
}
}
}
}
if (toResolve.isEmpty() && request.ignoreUnavailable() == false && isCurrentSnapshotsOnly(request.snapshots()) == false) {
throw new SnapshotMissingException(repository, request.snapshots()[0]);
}
}
final List snapshotInfos;
if (request.verbose()) {
snapshotInfos = snapshotsService.snapshots(repository, new ArrayList<>(toResolve), request.ignoreUnavailable());
} else {
if (repositoryData != null) {
// want non-current snapshots as well, which are found in the repository data
snapshotInfos = buildSimpleSnapshotInfos(toResolve, repositoryData, currentSnapshots);
} else {
// only want current snapshots
snapshotInfos = currentSnapshots.stream().map(SnapshotInfo::basic).collect(Collectors.toList());
CollectionUtil.timSort(snapshotInfos);
}
}
listener.onResponse(new GetSnapshotsResponse(snapshotInfos));
} catch (Exception e) {
listener.onFailure(e);
}
}
private boolean isAllSnapshots(String[] snapshots) {
return (snapshots.length == 0) || (snapshots.length == 1 && GetSnapshotsRequest.ALL_SNAPSHOTS.equalsIgnoreCase(snapshots[0]));
}
private boolean isCurrentSnapshotsOnly(String[] snapshots) {
return (snapshots.length == 1 && GetSnapshotsRequest.CURRENT_SNAPSHOT.equalsIgnoreCase(snapshots[0]));
}
private List buildSimpleSnapshotInfos(final Set toResolve,
final RepositoryData repositoryData,
final List currentSnapshots) {
List snapshotInfos = new ArrayList<>();
for (SnapshotInfo snapshotInfo : currentSnapshots) {
if (toResolve.remove(snapshotInfo.snapshotId())) {
snapshotInfos.add(snapshotInfo.basic());
}
}
Map> snapshotsToIndices = new HashMap<>();
for (IndexId indexId : repositoryData.getIndices().values()) {
for (SnapshotId snapshotId : repositoryData.getSnapshots(indexId)) {
if (toResolve.contains(snapshotId)) {
snapshotsToIndices.computeIfAbsent(snapshotId, (k) -> new ArrayList<>())
.add(indexId.getName());
}
}
}
for (SnapshotId snapshotId : toResolve) {
final List indices = snapshotsToIndices.getOrDefault(snapshotId, Collections.emptyList());
CollectionUtil.timSort(indices);
snapshotInfos.add(new SnapshotInfo(snapshotId, indices, repositoryData.getSnapshotState(snapshotId)));
}
CollectionUtil.timSort(snapshotInfos);
return Collections.unmodifiableList(snapshotInfos);
}
}