private void judge_Election()
{
StopThread();
switch (ServerHandler_.election_state_)
{
case ElectionState.ElectionFailed:
ServerHandler_.ToBeFollower();
break;
case ElectionState.ElectionSuccess:
ServerHandler_.ToBeLeader();
ServerHandler_.reInitLeader();
break;
case ElectionState.HigherTerm:
ServerHandler_.ToBeFollower();
break;
case ElectionState.Stop:
ServerHandler_.ToBeFollower();
break;
}
SwitchThread();
StartThread();
ServerHandler_.is_election_done_ = false;
}
private void commit()
{
while (!node_should_stop_)
{
ServerHandler_.commit();
}
}
private void judge_Timeout()
{
if (ServerHandler_.role == NodeRole.Candidate)
{
lock (this)
{
StopThread();
SwitchThread();
StartThread();
ServerHandler_.ToBeRunning();
}
}
else
{
ServerHandler_.LOG(String.Format("get Timeout state"));
}
}
private void judge_FindLeader()
{
if (ServerHandler_.role == NodeRole.Follower)
{
lock (this)
{
StopThread();
SwitchThread();
StartThread();
ServerHandler_.ToBeRunning();
}
}
else
{
ServerHandler_.LOG(String.Format("get FindLeader state"));
}
}
private void judge_HigherTerm()
{
// 引发higher term的时候就已经把role改为了follower
if (ServerHandler_.role != NodeRole.Follower)
{
// do nothing
}
else
{
lock (this)
{
StopThread();
ServerHandler_.ToBeFollower();
SwitchThread();
StartThread();
ServerHandler_.ToBeRunning();
}
}
}
private void state_checker()
{
Console.WriteLine("state checker thread running...");
while (!node_should_stop_)
{
if (ServerHandler_.is_election_done_)
{
lock (this)
{
judge_Election();
}
}
lock (this)
{
switch (ServerHandler_.state) //judge internal state(state can be verify in heartbeat and vote)
{
case ServerState.Running:
// everything is ok!
break;
case ServerState.FindLeader:
judge_FindLeader();
break;
case ServerState.Timeout:
judge_Timeout();
break;
case ServerState.HigherTerm:
judge_HigherTerm();
break;
default:
ServerHandler_.LOG(String.Format("Unknown state {0}", ServerHandler_.state));
break;
}
}
}
Console.WriteLine("{0} state checker thread existed!", ServerHandler_.id);
}