private void ConvertStateFromCandidateTo(RaftState newState)
{
switch (newState)
{
case RaftState.Follower:
logger.Info($"RaftState {Name}: Candidate->Follower");
State = RaftState.Follower;
VoteSuccess.Clear(); // 选举结束清除。
LogSequence.SetVoteFor(string.Empty);
StartRequestVoteDelayTask?.Cancel();
StartRequestVoteDelayTask = null;
WaitMajorityVoteTimoutTask?.Cancel();
WaitMajorityVoteTimoutTask = null;
StartLeaderLostTimerTask();
return;
case RaftState.Candidate:
logger.Info($"RaftState {Name}: Candidate->Candidate");
LogSequence.SetVoteFor(string.Empty); // 先清除，在真正自荐前可以给别人投票。
StartRequestVote();
return;
case RaftState.Leader:
StartRequestVoteDelayTask?.Cancel();
StartRequestVoteDelayTask = null;
WaitMajorityVoteTimoutTask?.Cancel();
WaitMajorityVoteTimoutTask = null;
VoteSuccess.Clear(); // 选举结束清除。
logger.Info($"RaftState {Name}: Candidate->Leader");
State = RaftState.Leader;
LogSequence.SetVoteFor(string.Empty);
LeaderId = Name; // set to self
// (Reinitialized after election)
var nextIndex = LogSequence.LastIndex + 1;
Server.Config.ForEachConnector(
(c) =>
{
var cex = c as Server.ConnectorEx;
cex.NextIndex = nextIndex;
cex.MatchIndex = 0;
});
// Upon election:
// send initial empty AppendEntries RPCs
// (heartbeat)to each server; repeat during
// idle periods to prevent election timeouts(§5.2)
LogSequence.AppendLog(new HeartbeatLog(HeartbeatLog.SetLeaderReadyEvent), false);
HearbeatTimerTask = Scheduler.Instance.Schedule(
(ThisTask) =>
{
var elapse = Util.Time.NowUnixMillis - LogSequence.AppendLogActiveTime;
if (elapse < RaftConfig.LeaderHeartbeatTimer)
{
LogSequence.AppendLog(new HeartbeatLog(), false);
}
},
1000,
1000);
return;
}
}
public void AppendLog(Log log, bool ApplySync = true)
{
LogSequence.AppendLog(log, ApplySync);
}