public async Task <AppendEntriesResult> AppendEntriesAsync(AppendEntriesArguments request)
{
lock (_lock)
{
Log.Verbose("Recieved AppendEntriesAsync from {LeaderId}", request.LeaderId);
if (request.Term > _currentTerm)
{
Log.Information("Term {Term} is greater than my term {CurrentTerm}, resetting to follower. Leader: {LeaderId}", request.Term, _currentTerm, request.LeaderId);
_currentTerm = request.Term;
_votedFor = null;
State = NodeState.Follower;
}
if (request.Term == _currentTerm && State == NodeState.Candidate)
{
Log.Information("Term {Term} equals my term {CurrentTerm}, resetting to follower. Leader: {LeaderId}", request.Term, _currentTerm, request.LeaderId);
_currentTerm = request.Term;
_votedFor = null;
State = NodeState.Follower;
}
if (request.Term == _currentTerm)
{
ResetElectionTimeout();
// TODO: Implement me
}
return(new AppendEntriesResult
{
Term = _currentTerm,
Success = false,
});
}
}
private async Task AppendEntries(string node)
{
try
{
int index = Array.IndexOf(_nodes, node);
var prevLog = _log.SingleOrDefault(l => l.Index == _nextIndex[index] - 1);
if (_nextIndex[index] == _matchIndex[index])
{
var request = new AppendEntriesArguments
{
Term = _currentTerm,
LeaderId = NodeName,
PrevLogIndex = prevLog?.Index ?? 0,
PrevLogTerm = prevLog?.Term ?? 0,
Entries = _log.Where(l => l.Index >= _nextIndex[index]).ToArray(),
LeaderCommit = _commitIndex
};
var result = await Communication.AppendEntriesAsync(node, request);
}
else
{
// Don't send actual logs until we know how up-to-date the node is
var request = new AppendEntriesArguments
{
Term = _currentTerm,
LeaderId = NodeName,
PrevLogIndex = prevLog?.Index ?? 0,
PrevLogTerm = prevLog?.Term ?? 0,
LeaderCommit = _commitIndex
};
var result = await Communication.AppendEntriesAsync(node, request);
}
}
catch (Exception ex)
{
Log.Error(ex, "Error in RequestVote");
}
}
public async Task <AppendEntriesResult> AppendEntriesAsync(string destination, AppendEntriesArguments message)
{
return((AppendEntriesResult) await SendMessageAsync(destination, message));
}
public async Task <AppendEntriesResult> AppendEntriesAsync(string destination, AppendEntriesArguments message)
{
var communication = _communication.GetCommunication(destination);
return(await communication.Server.AppendEntriesAsync(message));
}