public override EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
lock (vote_heartbeat_Lock)
{
Console.WriteLine("heartbeat");
//Console.WriteLine("Candidate: AppendEntryWrite from: " + leaderID);
if (term < _term)
{
//TODO
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
else
{
_term = term;
Console.WriteLine("Leader changed to: " + leaderID);
if (entryPacket.Count == 0)
{
timerThreadBlock = true;
_server.updateState("follower", _term, leaderID);
_server = null;
electionTimeout.Dispose();
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
if ((_server.getLogIndex() - 1 + entryPacket.Count) != entryPacket.Entrys[entryPacket.Count - 1].LogIndex)
{
//envio o server log index e isso diz quantas entrys tem o log, do lado de la, ele ve
Console.WriteLine("Candidate -> Follower : appendEntry ");
timerThreadBlock = true;
_server.updateState("follower", _term, leaderID);
_server = null;
electionTimeout.Dispose();
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
foreach (Entry entry in entryPacket.Entrys)
{
_server.addEntrytoLog(entry);
//TODO, matilde queres meter a comparacao de strings como gostas? xD
if (entry.Type == "write")
{
_server.writeLeader(entry.Tuple);
}
else
{
_server.takeLeader(entry.Tuple);
}
}
Console.WriteLine("Candidate -> Follower : append Entry");
timerThreadBlock = true;
_server.updateState("follower", _term, leaderID);
_server = null;
electionTimeout.Dispose();
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
}
}
public override EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
lock (vote_heartbeat_Lock)
{
if (term < _term)
{
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
else
{
_term = term;
Console.WriteLine("Leader changed to: " + leaderID);
if (entryPacket.Count == 0)
{
timerThreadBlock = true;
stopClock();
_server.updateState("follower", _term, leaderID);
_server = null;
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
if ((_server.getLogIndex() - 1 + entryPacket.Count) != entryPacket.Entrys[entryPacket.Count - 1].LogIndex)
{
//envio o server log index e isso diz quantas entrys tem o log, do lado de la, ele ve
timerThreadBlock = true;
stopClock();
_server.updateState("follower", _term, leaderID);
_server = null;
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
foreach (Entry entry in entryPacket.Entrys)
{
if (entry.Type == "write")
{
_server.addEntrytoLog(entry);
_server.writeLeader(entry.Tuple);
}
else
{
_server.takeLeader(entry.Tuple, entry.Term);
}
}
timerThreadBlock = true;
stopClock();
_server.updateState("follower", _term, leaderID);
_server = null;
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
}
}
public override EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
lock (vote_heartbeat_Lock)
{
if (_term < term)
{
_term = term;
Console.WriteLine("Leader: AppendEntry from: " + leaderID);
//TODO PEDIR AO SOUSA PARA EXPLICAR, FOLHA DO MARCO
if ((_server.getLogIndex() - 1 + entryPacket.Count) != entryPacket.Entrys[entryPacket.Count - 1].LogIndex)
{
//envio o server log index e isso diz quantas entrys tem o log, do lado de la, ele ve
Console.WriteLine("Leader -> Follower : appendEntry");
_server.updateState("follower", _term, leaderID);
_server = null;
timer.Dispose();
timerThreadBlock = true;
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
foreach (Entry entry in entryPacket.Entrys)
{
_server.addEntrytoLog(entry);
//TODO, matilde queres meter a comparacao de strings como gostas? xD
if (entry.Type == "write")
{
_server.writeLeader(entry.Tuple);
}
else
{
_server.takeLeader(entry.Tuple);
}
}
Console.WriteLine("Leader -> Follower : appendEntry");
timerThreadBlock = true;
_server.updateState("follower", _term, leaderID);
_server = null;
timer.Dispose();
//envio o server log index porque quando o servidor me enviar isto ele ja vai ter adicionado ao log dele
//logo na resposta vou comparar _server.logIndex do lado de lado com o deste
//na verdade o que estao a ver e: se deu true, entao eu tenho tantas packets como quem me respondeu
//se bem que visto que esta true ele n vai verificar nada do log index ou term
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
}
public override EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
lock (vote_heartbeat_Lock)
{
if (term < _term)
{
//o pedido que recebi e de um lider que ficou para tras
//apenas no unperfect
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
else
{
try
{
if (!electionTimeout.Enabled) //caso em que timer acabou durante o processamento de um heartbeat
{
timerThreadBlock = true;
}
stopClock();
if (entryPacket.Count == 0)
{
if (leaderID != _leaderUrl)
{
_leaderUrl = leaderID;
_leaderRemote = _server.serverRemoteObjects[_leaderUrl];
Console.WriteLine("Follower: Leader is now: " + leaderID);
}
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
_term = term; //pode ser != mas visto que se tiver desatualizado e para tras
if ((_server.getLogIndex() - 1 + entryPacket.Count) == entryPacket.Entrys[entryPacket.Count - 1].LogIndex)
{
//envio o server log index e isso diz quantas entrys tem o log, do lado de la, ele ve
//Treasts case of leader changed
if (leaderID != _leaderUrl)
{
_leaderUrl = leaderID;
_leaderRemote = _server.serverRemoteObjects[_leaderUrl];
Console.WriteLine("Follower: Leader is now: " + leaderID);
}
foreach (Entry entry in entryPacket.Entrys)
{
if (entry.Type == "write")
{
_server.addEntrytoLog(entry);
_server.writeLeader(entry.Tuple);
}
else
{
_server.takeLeader(entry.Tuple, entry.Term);
}
}
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
else
{
//manda apenas o log index porque assim o server vai saber quantas entrys no log do follower estao
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
}
finally
{
SetTimer();
}
}
}
}
public EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
return(_state.appendEntry(entryPacket, term, leaderID));
}
public void pulseAppendEntry()
{
if (timerThreadBlock)
{
return;
}
int sucess = 1;
timer.Enabled = true;
if (_server.fd.changed())
{
_view = _server.fd.getView();
_numServers = _view.Count();
}
Dictionary <int, string> i_url_map = new Dictionary <int, string>();
WaitHandle[] handles = new WaitHandle[_numServers - 1];
IAsyncResult[] asyncResults = new IAsyncResult[_numServers - 1];
try {
int i = 0;
foreach (string url in _view)
{
if (url == _url)
{
continue;
}
EntryPacket entryPacket = new EntryPacket();
int theirIndex = _server.matchIndexMap[url];
int myindex = _server.getLogIndex();
if (myindex != theirIndex)
{
for (int k = theirIndex; k < myindex; k++)
{
entryPacket.Add(_server.entryLog[k]);
}
}
ServerService remoteObject = (ServerService)_serverRemoteObjects[url];
appendEntryDelegate appendEntryDel = new appendEntryDelegate(remoteObject.appendEntry);
IAsyncResult ar = appendEntryDel.BeginInvoke(entryPacket, _term, _url, null, null);
asyncResults[i] = ar;
handles[i] = ar.AsyncWaitHandle;
i_url_map.Add(i, url);
i++;
}
if (!WaitHandle.WaitAll(handles, 5000)) //TODO esta desoncronizado
{
pulseHeartbeat();
}
else
{
foreach (KeyValuePair <int, string> entry in i_url_map)
{
IAsyncResult asyncResult = asyncResults[entry.Key];
appendEntryDelegate appendEntryDel = (appendEntryDelegate)((AsyncResult)asyncResult).AsyncDelegate;
EntryResponse response = appendEntryDel.EndInvoke(asyncResult);
if (!response.Sucess) //foi false
{
if (_term < response.Term) //term da resposta e maior do que o meu
{
Console.WriteLine("Leader -> Follower : pulseappendEntry");
timerThreadBlock = true;
_server.updateState("follower", _term, response.Leader);
_server = null;
timer.Dispose();
}
//nao estou a tratar quando da false por causa do log aqui especificamente
//trato tudo da mesma maneira
}
//se tiver ter dado true e porque os 2 estao up to date, logo atualizo o dele para o bem
//se tiver dado false, meto no mapa nao contando para os sucessos,
//depois no heartbeat a seguir deve sincronizar teoricamente :)
_server.matchIndexMap[entry.Value] = response.MatchIndex;
if (response.Sucess)
{
sucess++;
}
}
if (!(sucess > (_numServers / 2)))
{
pulseAppendEntry();
}
}
}
catch (ElectionException) {
//nao sei se e preciso tratar visto que nao pode existir 1 lider e 1 candidato ao mesmo tempo
}
catch (SocketException) {
//TODO
throw new NotImplementedException();
}
}
public abstract EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID);
public EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
_server.checkFrozen();
return(_server.appendEntry(entryPacket, term, leaderID));
}
public override EntryResponse appendEntry(EntryPacket entryPacket, int term, string leaderID)
{
lock (vote_heartbeat_Lock)
{
//Console.WriteLine("heartbeat");
if (term < _term)
{
//o pedido que recebi e de um lider que ficou para tras
//apenas no unperfect
Console.WriteLine("Returned false because term of leader is lower");
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
else
{
try
{
if (!electionTimeout.Enabled) //caso em que timer acabou durante o processamento de um heartbeat
{
timerThreadBlock = true;
}
else
{
electionTimeout.Stop();
}
electionTimeout.Interval = wait;
if (entryPacket.Count == 0)
{
if (leaderID != _leaderUrl)
{
_leaderUrl = leaderID;
_leaderRemote = _server.serverRemoteObjects[_leaderUrl];
//Console.WriteLine("Follower: Leader is now: " + leaderID);
}
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
Console.WriteLine("UPDATE TERM IN APPEND ENTRY");
_term = term; //pode ser != mas visto que se tiver desatualizado e para tras
if ((_server.getLogIndex() - 1 + entryPacket.Count) == entryPacket.Entrys[entryPacket.Count - 1].LogIndex)
{
//envio o server log index e isso diz quantas entrys tem o log, do lado de la, ele ve
//Treasts case of leader changed
if (leaderID != _leaderUrl)
{
_leaderUrl = leaderID;
_leaderRemote = _server.serverRemoteObjects[_leaderUrl];
Console.WriteLine("Follower: Leader is now: " + leaderID);
}
foreach (Entry entry in entryPacket.Entrys)
{
_server.addEntrytoLog(entry);
//TODO, matilde queres meter a comparacao de strings como gostas? xD
if (entry.Type == "write")
{
_server.writeLeader(entry.Tuple);
}
else
{
_server.takeLeader(entry.Tuple);
}
}
return(new EntryResponse(true, _term, _server.getLogIndex()));
}
else
{
Console.WriteLine("Rejected entry because i am not up do date");
//manda apenas o log index porque assim o server vai saber quantas entrys no log do follower estao
return(new EntryResponse(false, _term, _server.getLogIndex()));
}
}
finally
{
electionTimeout.Start();
}
}
}
}
