wiredtiger_begin_transaction_block.h

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#pragma once

#include <string>

#include <wiredtiger.h>

#include "mongo/base/status.h"
#include "mongo/bson/timestamp.h"

namespace mongo {

class WiredTigerBeginTxnBlock {
public:
    // Whether or not to ignore prepared transactions.
    enum class IgnorePrepared {
        kNoIgnore,  // Do not ignore prepared transactions and return prepare conflicts.
        kIgnore     // Ignore prepared transactions and show prepared, but uncommitted data.
    };

    // Whether or not to round up to the oldest timestamp when the read timestamp is behind it.
    enum class RoundToOldest {
        kNoRound,  // Do not round to the oldest timestamp. BadValue error may be returned.
        kRound     // Round the read timestamp up to the oldest timestamp when it is behind.
    };

    WiredTigerBeginTxnBlock(WT_SESSION* session,
                            IgnorePrepared ignorePrepared = IgnorePrepared::kNoIgnore);
    WiredTigerBeginTxnBlock(WT_SESSION* session, const char* config);
    ~WiredTigerBeginTxnBlock();

    Status setTimestamp(Timestamp, RoundToOldest roundToOldest = RoundToOldest::kNoRound);

    void done();

private:
    WT_SESSION* _session;
    bool _rollback = false;
};

}  // namespace mongo