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/**
* Copyright (C) 2021-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <string>
#include <vector>
#include <boost/filesystem/operations.hpp>
#include <fmt/format.h>
#include "mongo/client/dbclient_connection.h"
#include "mongo/db/cursor_id.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_import.h"
#include "mongo/executor/scoped_task_executor.h"
#include "mongo/util/cancellation.h"
namespace mongo::repl::shard_merge_utils {
inline constexpr StringData kDonatedFilesPrefix = "donatedFiles."_sd;
inline constexpr StringData kMigrationTmpDirPrefix = "migrationTmpFiles"_sd;
inline constexpr StringData kMigrationIdFieldName = "migrationId"_sd;
inline constexpr StringData kBackupIdFieldName = "backupId"_sd;
inline constexpr StringData kDonorFieldName = "donor"_sd;
inline constexpr StringData kDonorDbPathFieldName = "dbpath"_sd;
inline bool isDonatedFilesCollection(const NamespaceString& ns) {
return ns.isConfigDB() && ns.coll().startsWith(kDonatedFilesPrefix);
}
inline NamespaceString getDonatedFilesNs(const UUID& migrationUUID) {
return NamespaceString(NamespaceString::kConfigDb,
kDonatedFilesPrefix + migrationUUID.toString());
}
inline boost::filesystem::path fileClonerTempDir(const UUID& migrationId) {
return boost::filesystem::path(storageGlobalParams.dbpath) /
fmt::format("{}.{}", kMigrationTmpDirPrefix.toString(), migrationId.toString());
}
/**
* Represents the document structure of config.donatedFiles_<MigrationUUID> collection.
*/
struct MetadataInfo {
explicit MetadataInfo(const UUID& backupId,
const UUID& migrationId,
const std::string& donor,
const std::string& donorDbPath)
: backupId(backupId), migrationId(migrationId), donor(donor), donorDbPath(donorDbPath) {}
UUID backupId;
UUID migrationId;
std::string donor;
std::string donorDbPath;
static MetadataInfo constructMetadataInfo(const UUID& migrationId,
const std::string& donor,
const BSONObj& obj) {
auto backupId = UUID(uassertStatusOK(UUID::parse(obj[kBackupIdFieldName])));
auto donorDbPath = obj[kDonorDbPathFieldName].String();
return MetadataInfo{backupId, migrationId, donor, donorDbPath};
}
BSONObj toBSON(const BSONObj& extraFields) const {
BSONObjBuilder bob;
migrationId.appendToBuilder(&bob, kMigrationIdFieldName);
backupId.appendToBuilder(&bob, kBackupIdFieldName);
bob.append(kDonorFieldName, donor);
bob.append(kDonorDbPathFieldName, donorDbPath);
bob.append("_id", OID::gen());
bob.appendElements(extraFields);
return bob.obj();
}
};
/**
* Copy a file from the donor.
*/
void cloneFile(OperationContext* opCtx, const BSONObj& metadataDoc);
/**
* Import a donor collection after its files have been cloned to a temp dir.
*/
void wiredTigerImportFromBackupCursor(OperationContext* opCtx,
const std::vector<CollectionImportMetadata>& metadatas,
const std::string& importPath);
/**
* Send a "getMore" to keep a backup cursor from timing out.
*/
SemiFuture<void> keepBackupCursorAlive(CancellationSource cancellationSource,
std::shared_ptr<executor::TaskExecutor> executor,
HostAndPort hostAndPort,
CursorId cursorId,
NamespaceString namespaceString);
} // namespace mongo::repl::shard_merge_utils
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