C++ (Cpp) PaxosMsg::minchoseninstanceidの例

コード例 #1

ファイル: learner.cpp プロジェクト: BLiYing/phxpaxos

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());
    }
}