size_t
LedgerHeaderFrame::copyLedgerHeadersToStream(Database& db, soci::session& sess,
uint32_t ledgerSeq,
uint32_t ledgerCount,
XDROutputFileStream& headersOut)
{
auto timer = db.getSelectTimer("ledger-header-history");
uint32_t begin = ledgerSeq, end = ledgerSeq + ledgerCount;
size_t n = 0;
string headerEncoded;
assert(begin <= end);
soci::statement st =
(sess.prepare << "SELECT data FROM ledgerheaders "
"WHERE ledgerseq >= :begin AND ledgerseq < :end ORDER "
"BY ledgerseq ASC",
into(headerEncoded), use(begin), use(end));
st.execute(true);
while (st.got_data())
{
LedgerHeaderHistoryEntry lhe;
LedgerHeaderFrame::pointer lhf = decodeFromData(headerEncoded);
lhe.hash = lhf->getHash();
lhe.header = lhf->mHeader;
CLOG(DEBUG, "Ledger") << "Streaming ledger-header "
<< lhe.header.ledgerSeq;
headersOut.writeOne(lhe);
++n;
st.fetch();
}
return n;
}
LedgerHeaderFrame::pointer
LedgerHeaderFrame::loadByHash(Hash const& hash, Database& db)
{
LedgerHeaderFrame::pointer lhf;
string hash_s(binToHex(hash));
string headerEncoded;
auto prep = db.getPreparedStatement("SELECT data FROM ledgerheaders "
"WHERE ledgerhash = :h");
auto& st = prep.statement();
st.exchange(into(headerEncoded));
st.exchange(use(hash_s));
st.define_and_bind();
{
auto timer = db.getSelectTimer("ledger-header");
st.execute(true);
}
if (st.got_data())
{
lhf = decodeFromData(headerEncoded);
if (lhf->getHash() != hash)
{
// wrong hash
lhf.reset();
}
}
return lhf;
}
std::string
LedgerManager::ledgerAbbrev(LedgerHeaderFrame::pointer p)
{
if (!p)
{
return "[empty]";
}
return ledgerAbbrev(p->mHeader, p->getHash());
}