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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 <memory>
#include <string>
#include <vector>
#include "mongo/base/checked_cast.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/record_id.h"
#include "mongo/db/storage/mobile/mobile_session.h"
#include "mongo/db/storage/mobile/mobile_session_pool.h"
#include "mongo/db/storage/recovery_unit.h"
#include "mongo/db/storage/snapshot.h"
#include "mongo/platform/atomic_word.h"
namespace mongo {
class SortedDataInterface;
class MobileRecoveryUnit final : public RecoveryUnit {
public:
MobileRecoveryUnit(MobileSessionPool* sessionPool);
virtual ~MobileRecoveryUnit();
void beginUnitOfWork(OperationContext* opCtx) override;
void commitUnitOfWork() override;
void abortUnitOfWork() override;
bool waitUntilDurable() override {
return true;
}
void abandonSnapshot() override;
void registerChange(Change* change) override;
SnapshotId getSnapshotId() const override {
return SnapshotId();
}
MobileSession* getSession(OperationContext* opCtx, bool readOnly = true);
MobileSession* getSessionNoTxn(OperationContext* opCtx);
bool inActiveTxn() const {
return _active;
}
void assertInActiveTxn() const;
void enqueueFailedDrop(std::string& dropQuery);
static MobileRecoveryUnit* get(OperationContext* opCtx) {
return checked_cast<MobileRecoveryUnit*>(opCtx->recoveryUnit());
}
void setOrderedCommit(bool orderedCommit) override {}
private:
void _abort();
void _commit();
void _ensureSession(OperationContext* opCtx);
void _txnClose(bool commit);
void _txnOpen(OperationContext* opCtx, bool readOnly);
void _upgradeToWriteSession(OperationContext* opCtx);
bool _areWriteUnitOfWorksBanned = false;
bool _inUnitOfWork;
bool _active;
static AtomicWord<long long> _nextID;
uint64_t _id;
bool _isReadOnly;
std::string _path;
MobileSessionPool* _sessionPool;
std::unique_ptr<MobileSession> _session;
using Changes = std::vector<std::unique_ptr<Change>>;
Changes _changes;
};
} // namespace mongo
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