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Optimize the startup code so we don't have long periods of slowness on startup.

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This commit is contained in:
JoelKatz
2013-01-10 08:41:32 -08:00
parent d17a08c357
commit e2bac0e7cd
3 changed files with 64 additions and 9 deletions
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47
src/cpp/ripple/Ledger.cpp
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@@ -529,6 +529,53 @@ Ledger::pointer Ledger::getSQL(const std::string& sql)
return ret;
}
uint256 Ledger::getHashByIndex(uint32 ledgerIndex)
{
uint256 ret;
std::string sql="SELECT LedgerHash FROM Ledgers WHERE LedgerSeq='";
sql.append(boost::lexical_cast<std::string>(ledgerIndex));
sql.append("';");
std::string hash;
{
Database *db = theApp->getLedgerDB()->getDB();
ScopedLock sl(theApp->getLedgerDB()->getDBLock());
if (!db->executeSQL(sql) || !db->startIterRows())
return ret;
db->getStr("LedgerHash", hash);
db->endIterRows();
}
ret.SetHex(hash);
return ret;
}
bool Ledger::getHashesByIndex(uint32 ledgerIndex, uint256& ledgerHash, uint256& parentHash)
{
std::string sql="SELECT LedgerHash,PrevHash FROM Ledgers WHERE LedgerSeq='";
sql.append(boost::lexical_cast<std::string>(ledgerIndex));
sql.append("';");
std::string hash, prevHash;
{
Database *db = theApp->getLedgerDB()->getDB();
ScopedLock sl(theApp->getLedgerDB()->getDBLock());
if (!db->executeSQL(sql) || !db->startIterRows())
return false;
db->getStr("LedgerHash", hash);
db->getStr("PrevHash", prevHash);
db->endIterRows();
}
ledgerHash.SetHex(hash);
parentHash.SetHex(prevHash);
assert(ledgerHash.isNonZero() && ((ledgerIndex == 0) || parentHash.isNonZero()));
return true;
}
Ledger::pointer Ledger::loadByIndex(uint32 ledgerIndex)
{ // This is a low-level function with no caching
std::string sql="SELECT * from Ledgers WHERE LedgerSeq='";