void Learner :: OnSendLearnValue_Ack(const PaxosMsg & oPaxosMsg)
{
BP->GetLearnerBP()->OnSendLearnValue_Ack();
PLGHead("Msg.Ack.Instanceid %lu Msg.from_nodeid %lu", oPaxosMsg.instanceid(), oPaxosMsg.nodeid());
m_oLearnerSender.Ack(oPaxosMsg.instanceid(), oPaxosMsg.nodeid());
}
void Learner :: OnSendNowInstanceID(const PaxosMsg & oPaxosMsg)
{
BP->GetLearnerBP()->OnSendNowInstanceID();
PLGHead("START Msg.InstanceID %lu Now.InstanceID %lu Msg.from_nodeid %lu Msg.MaxInstanceID %lu systemvariables_size %zu mastervariables_size %zu",
oPaxosMsg.instanceid(), GetInstanceID(), oPaxosMsg.nodeid(), oPaxosMsg.nowinstanceid(),
oPaxosMsg.systemvariables().size(), oPaxosMsg.mastervariables().size());
SetSeenInstanceID(oPaxosMsg.nowinstanceid(), oPaxosMsg.nodeid());
bool bSystemVariablesChange = false;
int ret = m_poConfig->GetSystemVSM()->UpdateByCheckpoint(oPaxosMsg.systemvariables(), bSystemVariablesChange);
if (ret == 0 && bSystemVariablesChange)
{
PLGHead("SystemVariables changed!, all thing need to reflesh, so skip this msg");
return;
}
bool bMasterVariablesChange = false;
if (m_poConfig->GetMasterSM() != nullptr)
{
ret = m_poConfig->GetMasterSM()->UpdateByCheckpoint(oPaxosMsg.mastervariables(), bMasterVariablesChange);
if (ret == 0 && bMasterVariablesChange)
{
PLGHead("MasterVariables changed!");
}
}
if (oPaxosMsg.instanceid() != GetInstanceID())
{
PLGErr("Lag msg, skip");
return;
}
if (oPaxosMsg.nowinstanceid() <= GetInstanceID())
{
PLGErr("Lag msg, skip");
return;
}
if (oPaxosMsg.minchoseninstanceid() > GetInstanceID())
{
BP->GetCheckpointBP()->NeedAskforCheckpoint();
PLGHead("my instanceid %lu small than other's minchoseninstanceid %lu, other nodeid %lu",
GetInstanceID(), oPaxosMsg.minchoseninstanceid(), oPaxosMsg.nodeid());
AskforCheckpoint(oPaxosMsg.nodeid());
}
else if (!m_bIsIMLearning)
{
ComfirmAskForLearn(oPaxosMsg.nodeid());
}
}
void Learner :: OnProposerSendSuccess(const PaxosMsg & oPaxosMsg)
{
BP->GetLearnerBP()->OnProposerSendSuccess();
PLGHead("START Msg.InstanceID %lu Now.InstanceID %lu Msg.ProposalID %lu State.AcceptedID %lu "
"State.AcceptedNodeID %lu, Msg.from_nodeid %lu",
oPaxosMsg.instanceid(), GetInstanceID(), oPaxosMsg.proposalid(),
m_poAcceptor->GetAcceptorState()->GetAcceptedBallot().m_llProposalID,
m_poAcceptor->GetAcceptorState()->GetAcceptedBallot().m_llNodeID,
oPaxosMsg.nodeid());
if (oPaxosMsg.instanceid() != GetInstanceID())
{
//Instance id not same, that means not in the same instance, ignord.
PLGDebug("InstanceID not same, skip msg");
return;
}
if (m_poAcceptor->GetAcceptorState()->GetAcceptedBallot().isnull())
{
//Not accept any yet.
BP->GetLearnerBP()->OnProposerSendSuccessNotAcceptYet();
PLGDebug("I haven't accpeted any proposal");
return;
}
BallotNumber oBallot(oPaxosMsg.proposalid(), oPaxosMsg.nodeid());
if (m_poAcceptor->GetAcceptorState()->GetAcceptedBallot()
!= oBallot)
{
//Proposalid not same, this accept value maybe not chosen value.
PLGDebug("ProposalBallot not same to AcceptedBallot");
BP->GetLearnerBP()->OnProposerSendSuccessBallotNotSame();
return;
}
//learn value.
m_oLearnerState.LearnValueWithoutWrite(
oPaxosMsg.instanceid(),
m_poAcceptor->GetAcceptorState()->GetAcceptedValue(),
m_poAcceptor->GetAcceptorState()->GetChecksum());
BP->GetLearnerBP()->OnProposerSendSuccessSuccessLearn();
PLGHead("END Learn value OK, value %zu", m_poAcceptor->GetAcceptorState()->GetAcceptedValue().size());
TransmitToFollower();
}
void Learner :: OnComfirmAskForLearn(const PaxosMsg & oPaxosMsg)
{
BP->GetLearnerBP()->OnComfirmAskForLearn();
PLGHead("START Msg.InstanceID %lu Msg.from_nodeid %lu", oPaxosMsg.instanceid(), oPaxosMsg.nodeid());
if (!m_oLearnerSender.Comfirm(oPaxosMsg.instanceid(), oPaxosMsg.nodeid()))
{
BP->GetLearnerBP()->OnComfirmAskForLearnGetLockFail();
PLGErr("LearnerSender comfirm fail, maybe is lag msg");
return;
}
PLGImp("OK, success comfirm");
}
void Learner :: OnAskforLearn(const PaxosMsg & oPaxosMsg)
{
BP->GetLearnerBP()->OnAskforLearn();
PLGHead("START Msg.InstanceID %lu Now.InstanceID %lu Msg.from_nodeid %lu MinChosenInstanceID %lu",
oPaxosMsg.instanceid(), GetInstanceID(), oPaxosMsg.nodeid(),
m_poCheckpointMgr->GetMinChosenInstanceID());
SetSeenInstanceID(oPaxosMsg.instanceid(), oPaxosMsg.nodeid());
if (oPaxosMsg.proposalnodeid() == m_poConfig->GetMyNodeID())
{
//Found a node follow me.
PLImp("Found a node %lu follow me.", oPaxosMsg.nodeid());
m_poConfig->AddFollowerNode(oPaxosMsg.nodeid());
}
if (oPaxosMsg.instanceid() >= GetInstanceID())
{
return;
}
if (oPaxosMsg.instanceid() >= m_poCheckpointMgr->GetMinChosenInstanceID())
{
if (!m_oLearnerSender.Prepare(oPaxosMsg.instanceid(), oPaxosMsg.nodeid()))
{
BP->GetLearnerBP()->OnAskforLearnGetLockFail();
PLGErr("LearnerSender working for others.");
if (oPaxosMsg.instanceid() == (GetInstanceID() - 1))
{
PLGImp("InstanceID only difference one, just send this value to other.");
//send one value
AcceptorStateData oState;
int ret = m_oPaxosLog.ReadState(m_poConfig->GetMyGroupIdx(), oPaxosMsg.instanceid(), oState);
if (ret == 0)
{
BallotNumber oBallot(oState.acceptedid(), oState.acceptednodeid());
SendLearnValue(oPaxosMsg.nodeid(), oPaxosMsg.instanceid(), oBallot, oState.acceptedvalue(), 0);
}
}
return;
}
}
SendNowInstanceID(oPaxosMsg.instanceid(), oPaxosMsg.nodeid());
}
void Learner :: OnSendLearnValue(const PaxosMsg & oPaxosMsg)
{
BP->GetLearnerBP()->OnSendLearnValue();
PLGHead("START Msg.InstanceID %lu Now.InstanceID %lu Msg.ballot_proposalid %lu Msg.ballot_nodeid %lu Msg.ValueSize %zu",
oPaxosMsg.instanceid(), GetInstanceID(), oPaxosMsg.proposalid(),
oPaxosMsg.nodeid(), oPaxosMsg.value().size());
if (oPaxosMsg.instanceid() > GetInstanceID())
{
PLGDebug("[Latest Msg] i can't learn");
return;
}
else if (oPaxosMsg.instanceid() < GetInstanceID())
{
PLGDebug("[Lag Msg] no need to learn");
return;
}
//learn value
BallotNumber oBallot(oPaxosMsg.proposalid(), oPaxosMsg.proposalnodeid());
int ret = m_oLearnerState.LearnValue(oPaxosMsg.instanceid(), oBallot, oPaxosMsg.value(), GetLastChecksum());
if (ret != 0)
{
PLGErr("LearnState.LearnValue fail, ret %d", ret);
return;
}
PLGHead("END LearnValue OK, proposalid %lu proposalid_nodeid %lu valueLen %zu",
oPaxosMsg.proposalid(), oPaxosMsg.nodeid(), oPaxosMsg.value().size());
if (oPaxosMsg.flag() == PaxosMsgFlagType_SendLearnValue_NeedAck)
{
//every time' when receive valid need ack learn value, reset noop timeout.
Reset_AskforLearn_Noop();
SendLearnValue_Ack(oPaxosMsg.nodeid());
}
}
void Learner :: AskforLearn()
{
BP->GetLearnerBP()->AskforLearn();
PLGHead("START");
PaxosMsg oPaxosMsg;
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_AskforLearn);
if (m_poConfig->IsIMFollower())
{
//this is not proposal nodeid, just use this val to bring followto nodeid info.
oPaxosMsg.set_proposalnodeid(m_poConfig->GetFollowToNodeID());
}
PLGHead("END InstanceID %lu MyNodeID %lu", oPaxosMsg.instanceid(), oPaxosMsg.nodeid());
BroadcastMessage(oPaxosMsg, BroadcastMessage_Type_RunSelf_None, Message_SendType_TCP);
BroadcastMessageToTempNode(oPaxosMsg, Message_SendType_UDP);
}