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/**
* Copyright (C) 2018-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.
*/
#pragma once
#include "mongo/base/disallow_copying.h"
#include "mongo/bson/timestamp.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/storage/recovery_unit.h"
namespace mongo {
/**
* TimestampBlock is an raii type that sets a commit timestamp on the RecoveryUnit at construction
* and clears it at destruction. RecoveryUnit::setTimestamp() should not be called while a
* TimestampBlock is in scope.
*/
class TimestampBlock {
MONGO_DISALLOW_COPYING(TimestampBlock);
public:
TimestampBlock(OperationContext* opCtx, Timestamp ts) : _opCtx(opCtx), _ts(ts) {
uassert(ErrorCodes::IllegalOperation,
"Cannot timestamp a write operation in read-only mode",
!storageGlobalParams.readOnly);
if (!_ts.isNull()) {
_opCtx->recoveryUnit()->setCommitTimestamp(_ts);
}
}
~TimestampBlock() {
if (!_ts.isNull()) {
_opCtx->recoveryUnit()->clearCommitTimestamp();
}
}
private:
OperationContext* const _opCtx;
Timestamp _ts;
};
} // namespace mongo
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