protected override VoteReply? VoteRequest2(Client client, VoteRequest request)
{
if (StepDown(request.Term))
//TODO: push back in to sequencer
return null;
//return new VoteReply()
//{
// From = _server.ID,
// Term = _server.PersistedStore.Term,
// Granted = false
//};
return null;
}
protected override VoteReply? VoteRequest2(Client client, VoteRequest request)
{
var _persistedState = _server.PersistedStore;
if (_persistedState.Term < request.Term)
{
_persistedState.Term = request.Term;
if (_heatbeatTimeout <= _server.Tick)
resetHeartbeat();
}
var ourLastLogTerm = _persistedState.GetLastTerm();
var termCheck = _persistedState.Term == request.Term;
var canVote = _persistedState.VotedFor == null || _persistedState.VotedFor == request.From;
var ourLogIsBetter = _persistedState.LogIsBetter(request.LogLength, request.LastTerm);
//var logTermFurther = request.LastTerm > ourLastLogTerm;
//var logIndexLonger = request.LastTerm == ourLastLogTerm && request.LogLength >= _persistedState.Length;
var granted = termCheck && canVote && !ourLogIsBetter;
if (!termCheck)
Console.WriteLine("{0}: Can not vote for {1} because term {2}, expected {3}", _server.Name, client.ID, request.Term, _persistedState.Term);
if (!canVote)
Console.WriteLine("{0}: Can not vote for {1} because I already voted for {2}", _server.Name, client.ID, _persistedState.VotedFor);
if (ourLogIsBetter)
Console.WriteLine("{0}: Can not vote for {1} because my log is more update to date", _server.Name, client.ID);
if (granted)
{
Console.WriteLine("{0}: Voted for {1}", _server.Name, client.ID);
_persistedState.VotedFor = client.ID;
_leader = null;
resetHeartbeat();
}
return new VoteReply()
{
From = _server.ID,
Term = _server.PersistedStore.Term,
Granted = granted
};
}
public VoteReply? VoteRequest2(VoteRequest request)
{
var client = _server.GetClient(request.From);
return VoteRequest2(client, request);
}
//protected abstract bool VoteRequest(Client client, VoteRequest request);
protected virtual VoteReply? VoteRequest2(Client client, VoteRequest request)
{
return null;
}
//protected override bool VoteRequest(Client client, VoteRequest request)
//{
// if (StepDown(request.Term))
// return false;
// client.SendVoteReply(false);
// return true;
//}
protected override VoteReply? VoteRequest2(Client client, VoteRequest request)
{
if (StepDown(request.Term))
//TODO: push back in to sequencer
return null;
return null;
}
//private static WebHttpBinding CreateDefaultBinding()
//{
// var binding = new WebHttpBinding();
// binding.ReaderQuotas.MaxArrayLength = int.MaxValue;
// binding.TransferMode = TransferMode.Streamed;
// binding.MaxReceivedMessageSize = 1024 * 1024 * 25;
// binding.MaxBufferSize = MESSAGE_BUFFER_LENGTH;
// return binding;
//}
public void VoteRequest()
{
LogIndex lastIndex;
var lastLogIndex = _server.PersistedStore.GetLastIndex(out lastIndex);
var message = new VoteRequest()
{
From = _server.ID,
Term = _server.PersistedStore.Term,
LastTerm = lastIndex.Term,
LogLength = _server.PersistedStore.Length
};
_currentMessage = _server.Transport.SendMessageAsync(this, message);
_lastMessage = message;
_rpcDue = _server.Tick + _server.PersistedStore.RPC_TIMEOUT;
}
public void SendRequest(Peer peer, VoteRequest request)
{
SendMessage(peer, request);
}
//protected override bool VoteRequest(Client client, VoteRequest request)
//{
// LastMessage = request;
// LastClient = client;
// return true;
//}
protected override VoteReply? VoteRequest2(Client client, VoteRequest request)
{
LastMessage = request;
LastClient = client;
return null;
}
//protected void handleRequestStatus(IModel model, StatusRequest request)
//{
// if (_persistedState.Term < request.Term)
// stepDown(model, request.Term);
// if (_state == ServerState.Follower && _persistedState.Term == request.Term)
// {
// var peer = _peers.First(x => x.ID == request.From);
// _electionAlarm = makeElectionAlarm(model);
// model.SendReply(peer, new StatusReply()
// {
// From = _id,
// CommitIndex = _commitIndex,
// Term = _persistedState.Term
// });
// Console.WriteLine("{0}: Sent status {1} to {2}", _id, _commitIndex, peer.ID);
// }
//}
//protected void handleStatusReply(IModel model, StatusReply reply)
//{
// if (_persistedState.Term < reply.Term)
// stepDown(model, reply.Term);
// if (_state == ServerState.Leader && _persistedState.Term == reply.Term)
// {
// var peer = _peers.First(x => x.ID == reply.From);
// peer.RpcDue = int.MaxValue;
// peer.MatchIndex = reply.CommitIndex;
// //Console.WriteLine("{0}: Peer {1} voted {2}", _id, peer.ID, peer.VotedGranted);
// }
//}
protected void handleRequestVote(IConsensus model, VoteRequest request)
{
if (_persistedState.Term < request.Term)
stepDown(model, request.Term);
//a leader would never request a peer vote
System.Diagnostics.Debug.Assert(_state != ServerState.Adding && _state != ServerState.Removing);
var peer = _peers.First(x => x.ID == request.From);
var ourLastLogTerm = _persistedState.GetLastTerm();
var termCheck = _persistedState.Term == request.Term;
var canVote = _persistedState.VotedFor == null || _persistedState.VotedFor == request.From;
var logTermFurther = request.LastTerm > ourLastLogTerm;
var logIndexLonger = request.LastTerm == ourLastLogTerm && request.LogLength >= _persistedState.Length;
var granted = termCheck && canVote && (logTermFurther || logIndexLonger);
if (!termCheck)
Console.WriteLine("{0}: Can not vote for {1} because term {2}, expected {3}", _id, peer.ID, request.Term, _persistedState.Term);
if (!canVote)
Console.WriteLine("{0}: Can not vote for {1} because I already voted for {2}", _id, peer.ID, _persistedState.VotedFor);
if (!(logTermFurther || logIndexLonger))
Console.WriteLine("{0}: Can not vote for {1} because my log is more update to date", _id, peer.ID);
if (granted)
{
Console.WriteLine("{0}: Voted for {1}", _id, peer.ID);
_persistedState.VotedFor = peer.ID;
updateElectionAlarm(model);
}
model.SendReply(peer, new VoteReply() { From = _id, Term = _persistedState.Term, Granted = granted });
}