public override void Reply(RequestVoteResponse resp)
{
Reply(resp.VoteGranted, resp);
}
public abstract void Reply(RequestVoteResponse resp);
public override void Handle(RequestVoteResponse resp)
{
if (FromOurTopology(resp) == false)
{
_log.Info("Got a request vote response message outside my cluster topology (id: {0}), ignoring", resp.ClusterTopologyId);
return;
}
long currentTerm = _wonTrialElection ? Engine.PersistentState.CurrentTerm : Engine.PersistentState.CurrentTerm + 1;
if (resp.VoteTerm != currentTerm)
{
_log.Info("Got a vote for {2}election term {0} but current term is {1}, ignoring", resp.VoteTerm, currentTerm,
_wonTrialElection ? " " : "trial ");
return;
}
if (resp.CurrentTerm > currentTerm)
{
_log.Info("CandidateStateBehavior -> UpdateCurrentTerm called, there is a new leader, moving to follower state");
Engine.UpdateCurrentTerm(resp.CurrentTerm, null);
return;
}
if (resp.VoteGranted == false)
{
if (resp.TermIncreaseMightGetMyVote)
_termIncreaseMightGetMyVote = true;
_log.Info("Vote rejected from {0} trial: {1}", resp.From, resp.TrialOnly);
return;
}
if (Engine.CurrentTopology.IsVoter(resp.From) == false) //precaution
{
_log.Info("Vote accepted from {0}, which isn't a voting node in our cluster", resp.From);
return;
}
if (resp.TrialOnly && _wonTrialElection) // note that we can't get a vote for real election when we get a trail, because the terms would be different
{
_log.Info("Got a vote for trial only from {0} but we already won the trial election for this round, ignoring", resp.From);
return;
}
_votesForMyLeadership.Add(resp.From);
_log.Info("Adding to my votes: {0} (current votes: {1})", resp.From, string.Join(", ", _votesForMyLeadership));
if (Engine.CurrentTopology.HasQuorum(_votesForMyLeadership) == false)
{
_log.Info("Not enough votes for leadership, votes = {0}", _votesForMyLeadership.Any() ? string.Join(", ", _votesForMyLeadership) : "empty");
return;
}
if (_wonTrialElection == false)
{
_wonTrialElection = true;
_log.Info("Won trial election with {0} votes from {1}, now running for real", _votesForMyLeadership.Count, string.Join(", ", _votesForMyLeadership));
StartElection();
return;
}
Engine.SetState(RaftEngineState.Leader);
_log.Info("Selected as leader, term = {0}", resp.CurrentTerm);
}
public virtual void Handle(RequestVoteResponse resp)
{
//do nothing, irrelevant here
}