int Learner :: SendLearnValue(
const nodeid_t iSendNodeID,
const uint64_t llLearnInstanceID,
const BallotNumber & oLearnedBallot,
const std::string & sLearnedValue,
const uint32_t iChecksum,
const bool bNeedAck)
{
BP->GetLearnerBP()->SendLearnValue();
PaxosMsg oPaxosMsg;
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_SendLearnValue);
oPaxosMsg.set_instanceid(llLearnInstanceID);
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_proposalnodeid(oLearnedBallot.m_llNodeID);
oPaxosMsg.set_proposalid(oLearnedBallot.m_llProposalID);
oPaxosMsg.set_value(sLearnedValue);
oPaxosMsg.set_lastchecksum(iChecksum);
if (bNeedAck)
{
oPaxosMsg.set_flag(PaxosMsgFlagType_SendLearnValue_NeedAck);
}
return SendMessage(iSendNodeID, oPaxosMsg, Message_SendType_TCP);
}
void Learner :: SendNowInstanceID(const uint64_t llInstanceID, const nodeid_t iSendNodeID)
{
BP->GetLearnerBP()->SendNowInstanceID();
PaxosMsg oPaxosMsg;
oPaxosMsg.set_instanceid(llInstanceID);
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_SendNowInstanceID);
oPaxosMsg.set_nowinstanceid(GetInstanceID());
oPaxosMsg.set_minchoseninstanceid(m_poCheckpointMgr->GetMinChosenInstanceID());
if ((GetInstanceID() - llInstanceID) > 50)
{
//instanceid too close not need to send vsm/master checkpoint.
string sSystemVariablesCPBuffer;
int ret = m_poConfig->GetSystemVSM()->GetCheckpointBuffer(sSystemVariablesCPBuffer);
if (ret == 0)
{
oPaxosMsg.set_systemvariables(sSystemVariablesCPBuffer);
}
string sMasterVariablesCPBuffer;
if (m_poConfig->GetMasterSM() != nullptr)
{
int ret = m_poConfig->GetMasterSM()->GetCheckpointBuffer(sMasterVariablesCPBuffer);
if (ret == 0)
{
oPaxosMsg.set_mastervariables(sMasterVariablesCPBuffer);
}
}
}
SendMessage(iSendNodeID, oPaxosMsg);
}
void Proposer :: Accept()
{
PLGHead("START ProposalID %lu ValueSize %zu ValueLen %zu",
m_oProposerState.GetProposalID(), m_oProposerState.GetValue().size(), m_oProposerState.GetValue().size());
BP->GetProposerBP()->Accept();
m_oTimeStat.Point();
ExitPrepare();
m_bIsAccepting = true;
PaxosMsg oPaxosMsg;
oPaxosMsg.set_msgtype(MsgType_PaxosAccept);
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_proposalid(m_oProposerState.GetProposalID());
oPaxosMsg.set_value(m_oProposerState.GetValue());
oPaxosMsg.set_lastchecksum(GetLastChecksum());
m_oMsgCounter.StartNewRound();
AddAcceptTimer();
PLGHead("END");
BroadcastMessage(oPaxosMsg, BroadcastMessage_Type_RunSelf_Final);
}
void Proposer :: Prepare(const bool bNeedNewBallot)
{
PLGHead("START Now.InstanceID %lu MyNodeID %lu State.ProposalID %lu State.ValueLen %zu",
GetInstanceID(), m_poConfig->GetMyNodeID(), m_oProposerState.GetProposalID(),
m_oProposerState.GetValue().size());
BP->GetProposerBP()->Prepare();
m_oTimeStat.Point();
ExitAccept();
m_bIsPreparing = true;
m_bCanSkipPrepare = false;
m_bWasRejectBySomeone = false;
m_oProposerState.ResetHighestOtherPreAcceptBallot();
if (bNeedNewBallot)
{
m_oProposerState.NewPrepare();
}
PaxosMsg oPaxosMsg;
oPaxosMsg.set_msgtype(MsgType_PaxosPrepare);
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_proposalid(m_oProposerState.GetProposalID());
m_oMsgCounter.StartNewRound();
AddPrepareTimer();
PLGHead("END OK");
BroadcastMessage(oPaxosMsg);
}
void Learner :: ProposerSendSuccess(
const uint64_t llLearnInstanceID,
const uint64_t llProposalID)
{
BP->GetLearnerBP()->ProposerSendSuccess();
PaxosMsg oPaxosMsg;
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_ProposerSendSuccess);
oPaxosMsg.set_instanceid(llLearnInstanceID);
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_proposalid(llProposalID);
oPaxosMsg.set_lastchecksum(GetLastChecksum());
//run self first
BroadcastMessage(oPaxosMsg, BroadcastMessage_Type_RunSelf_First);
}
void Learner :: ComfirmAskForLearn(const nodeid_t iSendNodeID)
{
BP->GetLearnerBP()->ComfirmAskForLearn();
PLGHead("START");
PaxosMsg oPaxosMsg;
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_ComfirmAskforLearn);
PLGHead("END InstanceID %lu MyNodeID %lu", GetInstanceID(), oPaxosMsg.nodeid());
SendMessage(iSendNodeID, oPaxosMsg);
m_bIsIMLearning = true;
}
void Learner :: AskforCheckpoint(const nodeid_t iSendNodeID)
{
PLGHead("START");
int ret = m_poCheckpointMgr->PrepareForAskforCheckpoint(iSendNodeID);
if (ret != 0)
{
return;
}
PaxosMsg oPaxosMsg;
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_AskforCheckpoint);
PLGHead("END InstanceID %lu MyNodeID %lu", GetInstanceID(), oPaxosMsg.nodeid());
SendMessage(iSendNodeID, oPaxosMsg);
}
void Learner :: TransmitToFollower()
{
if (m_poConfig->GetMyFollowerCount() == 0)
{
return;
}
PaxosMsg oPaxosMsg;
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_SendLearnValue);
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
oPaxosMsg.set_proposalnodeid(m_poAcceptor->GetAcceptorState()->GetAcceptedBallot().m_llNodeID);
oPaxosMsg.set_proposalid(m_poAcceptor->GetAcceptorState()->GetAcceptedBallot().m_llProposalID);
oPaxosMsg.set_value(m_poAcceptor->GetAcceptorState()->GetAcceptedValue());
oPaxosMsg.set_lastchecksum(GetLastChecksum());
BroadcastMessageToFollower(oPaxosMsg, Message_SendType_TCP);
PLGHead("ok");
}
void Learner :: SendLearnValue_Ack(const nodeid_t iSendNodeID)
{
PLGHead("START LastAck.Instanceid %lu Now.Instanceid %lu", m_llLastAckInstanceID, GetInstanceID());
if (GetInstanceID() < m_llLastAckInstanceID + SENDLEARNVALUE_ACK_LEAD)
{
PLGImp("No need to ack");
return;
}
BP->GetLearnerBP()->SendLearnValue_Ack();
m_llLastAckInstanceID = GetInstanceID();
PaxosMsg oPaxosMsg;
oPaxosMsg.set_instanceid(GetInstanceID());
oPaxosMsg.set_msgtype(MsgType_PaxosLearner_SendLearnValue_Ack);
oPaxosMsg.set_nodeid(m_poConfig->GetMyNodeID());
SendMessage(iSendNodeID, oPaxosMsg);
PLGHead("End. ok");
}
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);
}
