C++ (Cpp) session::got_data示例

示例#1

文件： LedgerHeaderFrame.cpp 项目： nullstyle/stellar-core

LedgerHeaderFrame::pointer
LedgerHeaderFrame::loadBySequence(uint32_t seq, Database& db,
                                  soci::session& sess)
{
    LedgerHeaderFrame::pointer lhf;

    string headerEncoded;
    {
        auto timer = db.getSelectTimer("ledger-header");
        sess << "SELECT data FROM ledgerheaders "
                "WHERE ledgerseq = :s",
            into(headerEncoded), use(seq);
    }
    if (sess.got_data())
    {
        lhf = decodeFromData(headerEncoded);
        uint32_t loadedSeq = lhf->mHeader.ledgerSeq;

        if (loadedSeq != seq)
        {
            throw std::runtime_error(
                fmt::format("Wrong sequence number in ledger header database: "
                            "loaded ledger {} contains {}",
                            seq, loadedSeq));
        }
    }

    return lhf;
}

示例#2

文件： LedgerHeaderFrame.cpp 项目： rtu/network

LedgerHeaderFrame::pointer
LedgerHeaderFrame::loadBySequence(uint32_t seq, Database& db,
                                  soci::session& sess)
{
    LedgerHeaderFrame::pointer lhf;

    string headerEncoded;
    {
        auto timer = db.getSelectTimer("ledger-header");
        sess << "SELECT data FROM ledgerheaders "
                "WHERE ledgerseq = :s",
            into(headerEncoded), use(seq);
    }
    if (sess.got_data())
    {
        lhf = decodeFromData(headerEncoded);

        if (lhf->mHeader.ledgerSeq != seq)
        {
            // wrong sequence number
            lhf.reset();
        }
    }

    return lhf;
}