void MasterStateMachine :: BeforePropose(const int iGroupIdx, std::string & sValue)
{
std::lock_guard<std::mutex> oLockGuard(m_oMutex);
MasterOperator oMasterOper;
bool bSucc = oMasterOper.ParseFromArray(sValue.data(), sValue.size());
if (!bSucc)
{
return;
}
oMasterOper.set_lastversion(m_llMasterVersion);
sValue.clear();
bSucc = oMasterOper.SerializeToString(&sValue);
assert(bSucc == true);
}
bool MasterStateMachine :: Execute(const int iGroupIdx, const uint64_t llInstanceID,
const std::string & sValue, SMCtx * poSMCtx)
{
MasterOperator oMasterOper;
bool bSucc = oMasterOper.ParseFromArray(sValue.data(), sValue.size());
if (!bSucc)
{
PLG1Err("oMasterOper data wrong");
//wrong oper data, just skip, so return true
return true;
}
if (oMasterOper.operator_() == MasterOperatorType_Complete)
{
uint64_t * pAbsMasterTimeout = nullptr;
if (poSMCtx != nullptr && poSMCtx->m_pCtx != nullptr)
{
pAbsMasterTimeout = (uint64_t *)poSMCtx->m_pCtx;
}
uint64_t llAbsMasterTimeout = pAbsMasterTimeout != nullptr ? *pAbsMasterTimeout : 0;
PLG1Imp("absmaster timeout %lu", llAbsMasterTimeout);
int ret = LearnMaster(llInstanceID, oMasterOper, llAbsMasterTimeout);
if (ret != 0)
{
return false;
}
}
else
{
PLG1Err("unknown op %u", oMasterOper.operator_());
//wrong op, just skip, so return true;
return true;
}
return true;
}
bool MasterStateMachine :: MakeOpValue(
const nodeid_t iNodeID,
const uint64_t llVersion,
const int iTimeout,
const MasterOperatorType iOp,
std::string & sPaxosValue)
{
MasterOperator oMasterOper;
oMasterOper.set_nodeid(iNodeID);
oMasterOper.set_version(llVersion);
oMasterOper.set_timeout(iTimeout);
oMasterOper.set_operator_(iOp);
oMasterOper.set_sid(OtherUtils::FastRand());
return oMasterOper.SerializeToString(&sPaxosValue);
}
int MasterStateMachine :: LearnMaster(
const uint64_t llInstanceID,
const MasterOperator & oMasterOper,
const uint64_t llAbsMasterTimeout)
{
ScopedLock<Mutex> oLockGuard(m_oMutex);
if (oMasterOper.version() != m_llMasterVersion)
{
PLG1Err("version conflit, op version %lu now master version %lu",
oMasterOper.version(), m_llMasterVersion);
return 0;
}
int ret = UpdateMasterToStore(oMasterOper.nodeid(), llInstanceID, oMasterOper.timeout());
if (ret != 0)
{
PLG1Err("UpdateMasterToStore fail, ret %d", ret);
return -1;
}
m_iMasterNodeID = oMasterOper.nodeid();
if (m_iMasterNodeID == m_iMyNodeID)
{
//self be master
//use local abstimeout
m_llAbsExpireTime = llAbsMasterTimeout;
PLG1Head("Be master success, absexpiretime %lu", m_llAbsExpireTime);
}
else
{
//other be master
//use new start timeout
m_llAbsExpireTime = Time::GetTimestampMS() + oMasterOper.timeout();
PLG1Head("Ohter be master, absexpiretime %lu", m_llAbsExpireTime);
}
m_iLeaseTime = oMasterOper.timeout();
m_llMasterVersion = llInstanceID;
PLG1Imp("OK, masternodeid %lu version %lu abstimeout %lu",
m_iMasterNodeID, m_llMasterVersion, m_llAbsExpireTime);
return 0;
}
int MasterStateMachine :: LearnMaster(
const uint64_t llInstanceID,
const MasterOperator & oMasterOper,
const uint64_t llAbsMasterTimeout)
{
std::lock_guard<std::mutex> oLockGuard(m_oMutex);
PLG1Debug("my last version %lu other last version %lu this version %lu instanceid %lu",
m_llMasterVersion, oMasterOper.lastversion(), oMasterOper.version(), llInstanceID);
if (oMasterOper.lastversion() != 0
&& llInstanceID > m_llMasterVersion
&& oMasterOper.lastversion() != m_llMasterVersion)
{
BP->GetMasterBP()->MasterSMInconsistent();
PLG1Err("other last version %lu not same to my last version %lu, instanceid %lu",
oMasterOper.lastversion(), m_llMasterVersion, llInstanceID);
PLG1Err("try to fix, set my master version %lu as other last version %lu, instanceid %lu",
m_llMasterVersion, oMasterOper.lastversion(), llInstanceID);
m_llMasterVersion = oMasterOper.lastversion();
}
if (oMasterOper.version() != m_llMasterVersion)
{
PLG1Debug("version conflit, op version %lu now master version %lu",
oMasterOper.version(), m_llMasterVersion);
return 0;
}
int ret = UpdateMasterToStore(oMasterOper.nodeid(), llInstanceID, oMasterOper.timeout());
if (ret != 0)
{
PLG1Err("UpdateMasterToStore fail, ret %d", ret);
return -1;
}
bool bMasterChange = false;
if (m_iMasterNodeID != oMasterOper.nodeid())
{
bMasterChange = true;
}
m_iMasterNodeID = oMasterOper.nodeid();
if (m_iMasterNodeID == m_iMyNodeID)
{
//self be master
//use local abstimeout
m_llAbsExpireTime = llAbsMasterTimeout;
BP->GetMasterBP()->SuccessBeMaster();
PLG1Head("Be master success, absexpiretime %lu", m_llAbsExpireTime);
}
else
{
//other be master
//use new start timeout
m_llAbsExpireTime = Time::GetSteadyClockMS() + oMasterOper.timeout();
BP->GetMasterBP()->OtherBeMaster();
PLG1Head("Ohter be master, absexpiretime %lu", m_llAbsExpireTime);
}
m_iLeaseTime = oMasterOper.timeout();
m_llMasterVersion = llInstanceID;
if (bMasterChange)
{
if (m_pMasterChangeCallback != nullptr)
{
m_pMasterChangeCallback(m_iMyGroupIdx, NodeInfo(m_iMasterNodeID), m_llMasterVersion);
}
}
PLG1Imp("OK, masternodeid %lu version %lu abstimeout %lu",
m_iMasterNodeID, m_llMasterVersion, m_llAbsExpireTime);
return 0;
}
