Method OnProposerSendSuccess

src/algorithm/learner.cpp:584–632

}

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();
}

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