//protected override bool VoteRequest(Client client, VoteRequest request)
//{
// if (client == null)
// client = new Client(_server, request.From);
// return base.VoteRequest(client, request);
//}
// should give its vote
//protected override bool VoteRequest(Client client, VoteRequest request)
//{
// return true;
//}
protected override bool AppendEntriesRequest(Client client, AppendEntriesRequest request)
{
return base.AppendEntriesRequest(client, request);
}
//protected override bool VoteRequest(Client client, VoteRequest request)
//{
// return true;
//}
protected override bool AppendEntriesRequest(Client client, AppendEntriesRequest request)
{
return true;
}
//public AppendEntriesReply? AppendEntriesRequest2(AppendEntriesRequest request)
//{
// var client = _server.GetClient(request.From);
// return AppendEntriesRequest2(client, request);
//}
public bool AppendEntriesRequest(AppendEntriesRequest request)
{
var client = _server.GetClient(request.From);
return AppendEntriesRequest(client, request);
}
protected override bool AppendEntriesRequest(Client client, AppendEntriesRequest request)
{
var _persistedState = _server.PersistedStore;
if (_persistedState.Term < request.Term)
_persistedState.Term = request.Term;
_server.ChangeState(new FollowerState(_server));
return false;
}
//protected override bool VoteReply(Client client, VoteReply reply)
//{
// return true;
//}
protected override bool AppendEntriesRequest(Client client, AppendEntriesRequest request)
{
client.SendRemoveServerRequest();
return base.AppendEntriesRequest(client, request);
}
protected abstract bool AppendEntriesRequest(Client client, AppendEntriesRequest request);
public void SendAppendEntriesRequest()
{
var _persistedState = _server.PersistedStore;
//Console.WriteLine("Send heart beat");
var prevIndex = _nextIndex - 1;
var lastIndex = Math.Min(prevIndex + 1, _persistedState.Length);
if (_matchIndex + 1 < _nextIndex)
lastIndex = prevIndex;
var entries = _persistedState.GetEntries(prevIndex, lastIndex);
//if (entries != null && entries.Length > 0)
// Console.WriteLine("{0}: {4} - Send AppendEnties[{1}-{2}] to {3}", _server.ID, prevIndex, lastIndex, ID, _server.Tick);
//else
// Console.WriteLine("{0}: Send heart beat to {1}", _server.ID, _id);
_rpcDue = _server.Tick + _server.PersistedStore.RPC_TIMEOUT;
_nextHeartBeat = _server.Tick + (_server.PersistedStore.ELECTION_TIMEOUT / 4);
var message = new AppendEntriesRequest()
{
From = _server.ID,
Term = _persistedState.Term,
PrevIndex = prevIndex,
PrevTerm = _persistedState.GetTerm(prevIndex),
AgentIP = _server.AgentIP,
Entries = entries,
CommitIndex = Math.Min(_server.CommitIndex, lastIndex)
};
_lastMessage = message;
_server.Transport.SendMessage(this, message);
_rpcDue = _server.Tick + _server.PersistedStore.RPC_TIMEOUT;
}
public void SendRequest(Peer peer, AppendEntriesRequest request)
{
SendMessage(peer, request);
}
protected override bool AppendEntriesRequest(Client client, AppendEntriesRequest request)
{
LastMessage = request;
LastClient = client;
return true;
}
protected override bool AppendEntriesRequest(Client client, AppendEntriesRequest request)
{
var _persistedState = _server.PersistedStore;
if (_persistedState.Term < request.Term)
_persistedState.Term = request.Term;
//Console.WriteLine("heatbeat");
_leader = client;
_leader.AgentIP = request.AgentIP;
var success = false;
var matchIndex = 0u;
if (_persistedState.Term == request.Term)
{
resetHeartbeat();
if (request.PrevIndex == 0 ||
(request.PrevIndex <= _persistedState.Length && _persistedState.GetTerm(request.PrevIndex) == request.PrevTerm))
{
success = true;
var index = request.PrevIndex;
for (var i = 0; request.Entries != null && i < request.Entries.Length; i++)
{
index++;
if (_persistedState.GetTerm(index) != request.Entries[i].Index.Term)
{
while (_persistedState.Length > index - 1)
{
Console.WriteLine("{0}: Rolling back log {1}", _server.Name, _persistedState.Length - 1);
_persistedState.Pop(_server);
}
//Console.WriteLine("{0}: Writing log value {1}", _id, request.Entries[i].Offset);
var pushed = _persistedState.Push(_server, request.Entries[i]);
if (pushed)
{
var lastEntry = _persistedState.GetEntry(index).Value;
if (!LogEntry.AreEqual(lastEntry, request.Entries[i]))
{
Console.WriteLine("{0}: Log entry push didn't match", _server.Name);
Console.WriteLine("{0}: Expected: {1}", _server.Name, request.Entries[i]);
Console.WriteLine("{0}: Got: {1}", _server.Name, lastEntry);
pushed = false;
}
//Console.WriteLine("{0}: Appending index: {1}, data length: {2}", _server.ID, index, request.Entries[i].Index.ChunkSize);
}
if(!pushed)
{
index--;
break;
}
}
}
matchIndex = index;
_server.AdvanceToCommit(Math.Max(_server.CommitIndex, request.CommitIndex));
}
else
{
Console.WriteLine("{0}: Append unsuccessful {{ request.PrevIndex[{1}] == 0 || (request.PrevIndex[{1}] <= _persistedState.Length[{2}] && _persistedState.GetTerm(request.PrevIndex[{1}])[{3}] == request.PrevTerm[{4}])) }}", _server.Name, request.PrevIndex, _persistedState.Length, _persistedState.GetTerm(request.PrevIndex), request.PrevTerm);
matchIndex = _server.CommitIndex;
}
}
else
{
Console.WriteLine("{0}: Append failed, terms didn't match", _server.Name);
//matchIndex = _server.CommitIndex;
}
client.SendAppendEntriesReply(matchIndex, success);
return true;
}
protected void handleAppendEntriesRequest(IConsensus model, AppendEntriesRequest request)
{
if (_persistedState.Term < request.Term)
stepDown(model, request.Term);
var peer = _peers.First(x => x.ID == request.From);
var success = false;
var matchIndex = 0u;
if (_persistedState.Term == request.Term)
{
_state = ServerState.Follower;
updateElectionAlarm(model);
if (request.PrevIndex == 0 ||
(request.PrevIndex <= _persistedState.Length && _persistedState.GetTerm(request.PrevIndex) == request.PrevTerm))
{
success = true;
var index = request.PrevIndex;
for (var i = 0; request.Entries != null && i < request.Entries.Length; i++)
{
index++;
if (_persistedState.GetTerm(index) != request.Entries[i].Index.Term)
{
while (_persistedState.Length > index - 1)
{
Console.WriteLine("{0}: Rolling back log {1}", _id, _persistedState.Length - 1);
_persistedState.Pop();
}
//Console.WriteLine("{0}: Writing log value {1}", _id, request.Entries[i].Offset);
_persistedState.Push(request.Entries[i]);
}
}
matchIndex = index;
commitIndex(Math.Max(_commitIndex, request.CommitIndex));
}
}
model.SendReply(peer, new AppendEntriesReply() { From = _id, Term = _persistedState.Term, MatchIndex = matchIndex, Success = success });
}