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More work on ledger sequencing:

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Track whether ledger is accepted.
	Assert on modifications to an accepted ledger.
	Save accepted ledgers to DB.
	Load ledger by hash/index.
	Ledger history functions, ledger canonicalization.
	'Push' ledger to history.
This commit is contained in:
JoelKatz
2011-12-13 18:05:29 -08:00
parent 80a6f7e5ad
commit 4b5bc85a0d
6 changed files with 169 additions and 30 deletions
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73
LedgerHistory.cpp
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@@ -1,7 +1,78 @@
#include <string>
#include "boost/bind.hpp"
#include "LedgerHistory.h"
#include "Config.h"
#include "Application.h"
#include <string>
void LedgerHistory::addLedger(Ledger::pointer ledger)
{
uint256 h(ledger->getHash());
boost::recursive_mutex::scoped_lock sl(mLock);
if(!mLedgersByHash[h]) mLedgersByHash[h]=ledger;
}
void LedgerHistory::addAcceptedLedger(Ledger::pointer ledger)
{
assert(ledger && ledger->isAccepted());
uint256 h(ledger->getHash());
boost::recursive_mutex::scoped_lock sl(mLock);
if(!!mLedgersByHash[h]) return;
mLedgersByHash[h]=ledger;
mLedgersByIndex[ledger->getLedgerSeq()]=ledger;
theApp->getIOService().post(boost::bind(&Ledger::saveAcceptedLedger, ledger));
}
Ledger::pointer LedgerHistory::getLedgerBySeq(uint32 index)
{
boost::recursive_mutex::scoped_lock sl(mLock);
Ledger::pointer ret(mLedgersByIndex[index]);
if(ret) return ret;
sl.unlock();
ret=Ledger::loadByIndex(index);
if(!ret) return ret;
assert(ret->getLedgerSeq()==index);
uint256 h=ret->getHash();
sl.lock();
mLedgersByIndex[index]=ret;
mLedgersByHash[h]=ret;
return ret;
}
Ledger::pointer LedgerHistory::getLedgerByHash(const uint256& hash)
{
boost::recursive_mutex::scoped_lock sl(mLock);
Ledger::pointer ret(mLedgersByHash[hash]);
if(ret) return ret;
sl.unlock();
ret=Ledger::loadByHash(hash);
if(!ret) return ret;
assert(ret->getHash()==hash);
sl.lock();
mLedgersByHash[hash]=ret;
if(ret->isAccepted()) mLedgersByIndex[ret->getLedgerSeq()]=ret;
return ret;
}
Ledger::pointer LedgerHistory::canonicalizeLedger(Ledger::pointer ledger, bool save)
{
uint256 h(ledger->getHash());
boost::recursive_mutex::scoped_lock sl(mLock);
Ledger::pointer ret(mLedgersByHash[h]);
if(ret) return ret;
if(!save) return ledger;
assert(ret->getHash()==h);
mLedgersByHash[h]=ledger;
if(ret->isAccepted()) mLedgersByIndex[ret->getLedgerSeq()]=ledger;
return ledger;
}
#if 0
bool LedgerHistory::loadLedger(const uint256& hash)