void ReplicatedLog::OnCatchupComplete(uint64_t paxosID_)
{
paxosID = paxosID_;
acceptor.OnCatchupComplete(); // commits
NewPaxosRound();
}
void ReplicatedLog::ProcessLearnChosen(uint64_t nodeID, uint64_t runID)
{
bool ownAppend;
Buffer learnedValue;
learnedValue.Write(acceptor.state.acceptedValue);
#ifdef RLOG_DEBUG_MESSAGES
Log_Debug("Round completed for paxosID = %U", paxosID);
Log_Trace("+++ Value for paxosID = %U: %B +++", paxosID, &learnedValue);
if (context->GetHighestPaxosID() > 0 && paxosID < context->GetHighestPaxosID() && !IsLeaseOwner())
{
Log_Debug("Paxos-based catchup, highest seen paxosID is %U, currently at %U",
context->GetHighestPaxosID(), paxosID);
if (paxosID == (context->GetHighestPaxosID() - 1))
Log_Debug("Paxos-based catchup complete...");
}
#endif
if (context->GetHighestPaxosID() > 0 && paxosID < (context->GetHighestPaxosID() - 1))
context->GetDatabase()->Commit();
NewPaxosRound(); // increments paxosID, clears proposer, acceptor
if (paxosID <= context->GetHighestPaxosID())
RequestChosen(nodeID);
ownAppend = proposer.state.multi;
if (nodeID == MY_NODEID && runID == REPLICATION_CONFIG->GetRunID() && context->IsLeaseOwner())
{
if (!proposer.state.multi)
{
proposer.state.multi = true;
context->OnIsLeader();
}
proposer.state.multi = true;
Log_Trace("Multi paxos enabled");
}
else
{
proposer.state.multi = false;
Log_Trace("Multi paxos disabled");
}
if (BUFCMP(&learnedValue, &dummy))
OnAppendComplete();
else
context->OnAppend(paxosID - 1, learnedValue, ownAppend);
// new convention: QuorumContext::OnAppend() must call
// ReplicatedLog::OnAppendComplete()
// when it's done!
}
void ReplicatedLog::OnAppendComplete()
{
waitingOnAppend = false;
NewPaxosRound(); // increments paxosID, clears proposer, acceptor
if (context->IsLeaseKnown() && paxosID <= context->GetHighestPaxosID())
RequestChosen(context->GetLeaseOwner());
if (paxosID < context->GetHighestPaxosID())
context->GetDatabase()->Commit();
if (!context->UseCommitChaining())
{
acceptor.WriteState();
context->GetDatabase()->Commit();
}
context->OnMessageProcessed();
TryAppendNextValue();
}
