void ProcessClientRequest()
{
this.LastClientRequest = this.ReceivedEvent as Client.Request;
var log = new Log(this.CurrentTerm, this.LastClientRequest.Command);
this.Logs.Add(log);
this.BroadcastLastClientRequest();
}
void RespondAppendEntriesAsLeader()
{
var request = this.ReceivedEvent as AppendEntriesResponse;
if (request.Term > this.CurrentTerm)
{
this.CurrentTerm = request.Term;
this.VotedFor = null;
this.RedirectLastClientRequestToClusterManager();
this.Raise(new BecomeFollower());
return;
}
else if (request.Term != this.CurrentTerm)
{
return;
}
if (request.Success)
{
this.NextIndex[request.Server] = this.Logs.Count + 1;
this.MatchIndex[request.Server] = this.Logs.Count;
this.VotesReceived++;
if (request.ReceiverEndpoint != null &&
this.VotesReceived >= (this.Servers.Length / 2) + 1)
{
this.Logger.WriteLine("\n [Leader] " + this.ServerId + " | term " + this.CurrentTerm +
" | append votes " + this.VotesReceived + " | append success\n");
var commitIndex = this.MatchIndex[request.Server];
if (commitIndex > this.CommitIndex &&
this.Logs[commitIndex - 1].Term == this.CurrentTerm)
{
this.CommitIndex = commitIndex;
this.Logger.WriteLine("\n [Leader] " + this.ServerId + " | term " + this.CurrentTerm +
" | log " + this.Logs.Count + " | command " + this.Logs[commitIndex - 1].Command + "\n");
}
this.VotesReceived = 0;
this.LastClientRequest = null;
this.Send(request.ReceiverEndpoint, new Client.Response());
}
}
else
{
if (this.NextIndex[request.Server] > 1)
{
this.NextIndex[request.Server] = this.NextIndex[request.Server] - 1;
}
var logs = this.Logs.GetRange(this.NextIndex[request.Server] - 1,
this.Logs.Count - (this.NextIndex[request.Server] - 1));
var prevLogIndex = this.NextIndex[request.Server] - 1;
var prevLogTerm = this.GetLogTermForIndex(prevLogIndex);
this.Logger.WriteLine("\n [Leader] " + this.ServerId + " | term " + this.CurrentTerm + " | log " +
this.Logs.Count + " | append votes " + this.VotesReceived +
" | append fail (next idx = " + this.NextIndex[request.Server] + ")\n");
this.Send(request.Server, new AppendEntriesRequest(this.CurrentTerm, this.Id, prevLogIndex,
prevLogTerm, logs, this.CommitIndex, request.ReceiverEndpoint));
}
}
