public void requestVote()
{
if (timerThreadBlock)
{
return;
}
if (_server.fd.changed())
{
_view = _server.fd.getView();
_numServers = _view.Count();
foreach (string url in _view)
{
if (!votemap.ContainsKey(url))
{
votemap.Add(url, false);
}
}
foreach (KeyValuePair <string, bool> entry in votemap)
{
if (!_view.Contains(entry.Key))
{
votemap.Remove(entry.Key);
}
}
}
int howmany = 0;
foreach (KeyValuePair <string, bool> entry in votemap)
{
if (!entry.Value)
{
howmany++;
}
}
WaitHandle[] handles = new WaitHandle[howmany];
IAsyncResult[] asyncResults = new IAsyncResult[howmany];
string[] requestId = new string[howmany];
try {
int i = 0;
foreach (KeyValuePair <string, bool> entry in votemap)
{
if (entry.Value)
{
continue;
}
ServerService remoteObject = (ServerService)_serverRemoteObjects[entry.Key];
voteDelegate voteDel = new voteDelegate(remoteObject.vote);
IAsyncResult ar = voteDel.BeginInvoke(_term, _url, null, null);
asyncResults[i] = ar;
handles[i] = ar.AsyncWaitHandle;
requestId[i] = entry.Key;
i++;
}
if (!WaitHandle.WaitAll(handles, 100))
{
requestVote();
}
else
{
for (i = 0; i < howmany; i++)
{
IAsyncResult asyncResult = asyncResults[i];
voteDelegate voteDel = (voteDelegate)((AsyncResult)asyncResult).AsyncDelegate;
bool response = voteDel.EndInvoke(asyncResult);
votemap.Remove(requestId[i]);
votemap.Add(requestId[i], true);
if (response)
{
votes++;
}
}
if (votes > (_numServers / 2))
{
stopClock();
timerThreadBlock = true;
_server.updateState("leader", _term, _url);
_server = null;
Console.WriteLine("Elected in term " + _term);
return;
}
else
{
Console.WriteLine("Finished elections without success.");
pulseVote.Stop();
pulseVote.Dispose();
SetVoteTimer();
}
}
}
catch (SocketException) {
requestVote();
}
}
public void requestVote()
{
Console.WriteLine("request_vote --t " + Thread.CurrentThread.ManagedThreadId);
if (timerThreadBlock)
{
return;
}
_term++;
Console.WriteLine("Started election in term " + _term);
int votes = 1;
if (_server.fd.changed())
{
_view = _server.fd.getView();
_numServers = _view.Count();
foreach (string url in _view)
{
Console.WriteLine(url);
}
}
Console.WriteLine("after view change");
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;
}
ServerService remoteObject = (ServerService)_serverRemoteObjects[url];
voteDelegate voteDel = new voteDelegate(remoteObject.vote);
IAsyncResult ar = voteDel.BeginInvoke(_term, _url, null, null);
asyncResults[i] = ar;
handles[i] = ar.AsyncWaitHandle;
i++;
}
if (!WaitHandle.WaitAll(handles, 4000)) //TODO
{
Console.WriteLine("candidate timeout waiting for votes");
requestVote();
}
else
{
for (i = 0; i < _numServers - 1; i++)
{
IAsyncResult asyncResult = asyncResults[i];
voteDelegate voteDel = (voteDelegate)((AsyncResult)asyncResult).AsyncDelegate;
bool response = voteDel.EndInvoke(asyncResult);
if (response)
{
votes++;
}
}
if (votes > (_numServers / 2))
{
electionTimeout.Stop();
timerThreadBlock = true;
_server.updateState("leader", _term, _url);
_server = null;
electionTimeout.Dispose();
Console.WriteLine("elected in term" + _term);
return;
}
else
{
Console.WriteLine("Finished elections without sucess");
}
}
wait = rnd.Next(1000, 1200);
electionTimeout.Interval = wait;
electionTimeout.Enabled = true;
}
catch (SocketException) {
//TODO
throw new NotImplementedException();
}
}
