org.elasticsearch.action.admin.cluster.repositories.get.TransportGetRepositoriesAction Maven / Gradle / Ivy
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.action.admin.cluster.repositories.get;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeReadAction;
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.metadata.RepositoriesMetadata;
import org.elasticsearch.cluster.metadata.RepositoryMetadata;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.repositories.RepositoryMissingException;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
/**
* Transport action for get repositories operation
*/
public class TransportGetRepositoriesAction extends TransportMasterNodeReadAction {
public static final String ALL_PATTERN = "_all";
@Inject
public TransportGetRepositoriesAction(
TransportService transportService,
ClusterService clusterService,
ThreadPool threadPool,
ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver
) {
super(
GetRepositoriesAction.NAME,
transportService,
clusterService,
threadPool,
actionFilters,
GetRepositoriesRequest::new,
indexNameExpressionResolver,
GetRepositoriesResponse::new,
ThreadPool.Names.SAME
);
}
public static boolean isMatchAll(String[] patterns) {
return (patterns.length == 0)
|| (patterns.length == 1 && (ALL_PATTERN.equalsIgnoreCase(patterns[0]) || Regex.isMatchAllPattern(patterns[0])));
}
@Override
protected ClusterBlockException checkBlock(GetRepositoriesRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_READ);
}
@Override
protected void masterOperation(
final GetRepositoriesRequest request,
ClusterState state,
final ActionListener listener
) {
listener.onResponse(new GetRepositoriesResponse(new RepositoriesMetadata(getRepositories(state, request.repositories()))));
}
/**
* Get repository metadata for given repository names from given cluster state.
*
* @param state Cluster state
* @param repoNames Repository names or patterns to get metadata for
* @return list of repository metadata
*/
public static List getRepositories(ClusterState state, String[] repoNames) {
RepositoriesMetadata repositories = state.metadata().custom(RepositoriesMetadata.TYPE, RepositoriesMetadata.EMPTY);
if (isMatchAll(repoNames)) {
return repositories.repositories();
}
final List includePatterns = new ArrayList<>();
final List excludePatterns = new ArrayList<>();
boolean seenWildcard = false;
for (String repositoryOrPattern : repoNames) {
if (seenWildcard && repositoryOrPattern.length() > 1 && repositoryOrPattern.startsWith("-")) {
excludePatterns.add(repositoryOrPattern.substring(1));
} else {
if (Regex.isSimpleMatchPattern(repositoryOrPattern)) {
seenWildcard = true;
} else {
if (repositories.repository(repositoryOrPattern) == null) {
throw new RepositoryMissingException(repositoryOrPattern);
}
}
includePatterns.add(repositoryOrPattern);
}
}
final String[] excludes = excludePatterns.toArray(Strings.EMPTY_ARRAY);
final Set repositoryListBuilder = new LinkedHashSet<>(); // to keep insertion order
for (String repositoryOrPattern : includePatterns) {
for (RepositoryMetadata repository : repositories.repositories()) {
if (repositoryListBuilder.contains(repository) == false
&& Regex.simpleMatch(repositoryOrPattern, repository.name())
&& Regex.simpleMatch(excludes, repository.name()) == false) {
repositoryListBuilder.add(repository);
}
}
}
return org.elasticsearch.core.List.copyOf(repositoryListBuilder);
}
}