private void RequestVote()
{
_stateController.UpdateTerm(_stateController.PersistentState.CurrentTerm + 1);
DebugConsole.WriteLine($"Starting election ... term :{_stateController.PersistentState.CurrentTerm}" + Environment.NewLine);
//Vote for current object
int votes = 1;
bool transferedLeader = false;
List <Task> taskList = new List <Task>();
int majorityCount = _node.Peers.Count;
foreach (Peer peer in _node.Peers)
{
Task task = Task.Run(() =>
{
try
{
VoteResponse response = RequestVoteCore(peer.RemoteClient);
if (_node.EnsureExistGreaterTermAndChangeRole(response.Term))
{
return;
}
if (response.VoteGranted)
{
lock (_transferedLeaderLockObj)
{
votes += 1;
if (!transferedLeader && votes > majorityCount / 2 + 1)
{
transferedLeader = true;
_node.ChangeRole(RoleType.Leader);
}
}
}
}
catch (Exception ex)
{
DebugConsole.WriteLine($"{ex.Message}");
}
});
taskList.Add(task);
}
Task.WaitAll(taskList.ToArray());
}
public VoteResponse GetVote(VoteReqeust request)
{
VoteResponse response = new VoteResponse();
PersistentState state = _stateController.PersistentState;
if (request.Term < state.CurrentTerm)
{
response.VoteGranted = false;
}
else if ((string.IsNullOrEmpty(state.VotedFor) || state.VotedFor == request.CandidateId) && request.LastLogTerm >= state.LastLogTerm && request.LastLogIndex >= state.LastLogIndex)
{
_stateController.UpdateVoteFor(request.CandidateId);
response.VoteGranted = true;
DebugConsole.WriteLine($"Voting for candidate {request.CandidateId} for term {request.Term}...");
}
response.Term = state.CurrentTerm;
return(response);
}
