public async Task <RequestVoteResult> RequestVoteAsync(RequestVoteArguments request)
{
lock (_lock)
{
if (request.Term > _currentTerm)
{
Log.Information("Term {Term} is greater than my term {CurrentTerm}, resetting to follower. Candidate: {CandidateId}", request.Term, _currentTerm, request.CandidateId);
_currentTerm = request.Term;
_votedFor = null;
State = NodeState.Follower;
}
if (request.Term == _currentTerm)
{
ResetElectionTimeout();
if (_votedFor == null)
{
Log.Information("Voted yes for {CandidateId} in term {Term}", request.CandidateId, request.Term);
_votedFor = request.CandidateId;
return(new RequestVoteResult
{
Term = _currentTerm,
VoteGranted = true
});
}
}
Log.Information("Voted no for {CandidateId} in term {Term}", request.CandidateId, request.Term);
return(new RequestVoteResult
{
Term = _currentTerm,
VoteGranted = false
});
}
}
private async Task RequestVote(string node)
{
try
{
var request = new RequestVoteArguments
{
CandidateId = NodeName,
Term = _currentTerm
};
var result = await Communication.RequestVoteAsync(node, request);
lock (_lock)
{
if (result.Term > _currentTerm)
{
Log.Information("Term {Term} is greater than my term {CurrentTerm}, resetting to follower.", result.Term, _currentTerm);
_currentTerm = result.Term;
_votedFor = null;
State = NodeState.Follower;
}
else if (result.Term == _currentTerm && State == NodeState.Candidate)
{
Log.Information("Recieved vote {Vote} in term {Term}", result.VoteGranted, result.Term);
if (result.VoteGranted)
{
RecordVote();
}
}
}
}
catch (Exception ex)
{
Log.Error(ex, "Error in RequestVote");
}
}
public async Task <RequestVoteResult> RequestVoteAsync(string destination, RequestVoteArguments message)
{
return((RequestVoteResult) await SendMessageAsync(destination, message));
}
public async Task <RequestVoteResult> RequestVoteAsync(string destination, RequestVoteArguments message)
{
var communication = _communication.GetCommunication(destination);
return(await communication.Server.RequestVoteAsync(message));
}
