private void Multicast(string subject, AsyncCallback asyncCallback, string operation)
{
List <string> servers = TSMan.ServerView.GetUrls();;
foreach (string serverUrl in servers)
{
TSpaceAdvServerXL server = (TSpaceAdvServerXL)Activator.GetObject(typeof(ITSpaceServer), serverUrl);
try
{
if (operation.Equals("AddToView"))
{
UpdateViewDel remoteDel = new UpdateViewDel(server.AddToView);
remoteDel.BeginInvoke(subject, asyncCallback, null);
}
else if (operation.Equals("RemoveFromView"))
{
UpdateViewDel remoteDel = new UpdateViewDel(server.RemoveFromView);
remoteDel.BeginInvoke(subject, asyncCallback, null);
}
}
catch (Exception)
{
Console.WriteLine("Failed to send");
}
}
}
private void TryRemoveFromView(string deadURL)
{
lock (SuspectedDead)
{
if (SuspectedDead.ContainsKey(deadURL) || !TSMan.ServerView.Contains(deadURL))
{
return;
}
SuspectedDead.Add(deadURL, 0);
TSpaceAdvManager.RWL.AcquireWriterLock(Timeout.Infinite);
}
Console.WriteLine("Suspected dead " + deadURL);
List <string> servers = new List <string>();
for (int i = 0; i < TSMan.ServerView.GetUrls().Count; i++)
{
servers.Add(TSMan.ServerView.GetUrls()[i]);
}
Monitor.Enter(SuspectedDead);
while (SuspectedDead.ContainsKey(deadURL) &&
(SuspectedDead[deadURL] < TSMan.Quorum(TSMan.ServerView.GetUrls().Count)))
{
TSpaceAdvServerXL server;
DeleteFromViewDel del;
AsyncCallback callback = new AsyncCallback(TryRemoveFromViewCallback);
foreach (string serverUrl in servers)
{
server = (TSpaceAdvServerXL)Activator.GetObject(typeof(ITSpaceServer), serverUrl);
del = new DeleteFromViewDel(server.TryConnection);
try
{
del.BeginInvoke(deadURL, false, callback, deadURL);
}
catch (Exception) { }
}
//Releases until it acquires the lock or timeout elapses
Monitor.Wait(SuspectedDead, 2000);
}
Monitor.Exit(SuspectedDead);
Console.WriteLine("Confirmed Dead " + deadURL);
lock (SuspectedDead)
{
//Already has been removed
if (!SuspectedDead.ContainsKey(deadURL))
{
Console.WriteLine("Already has been removed");
TSpaceAdvManager.RWL.ReleaseWriterLock();
return;
}
}
//TODO add variable refering current remove
//Only inc ack if in that remove
Console.WriteLine("Entering wait");
Monitor.Enter(RemoveFromViewLock);
UpdateViewCounter = 0;
while (UpdateViewCounter < TSMan.Quorum(servers.Count))
{
TSpaceAdvServerXL server;
UpdateViewDel del;
AsyncCallback callback = new AsyncCallback(RemoveFromViewCallback);
List <string> testServers = new List <string>(servers);
foreach (string serverUrl in testServers)
{
server = (TSpaceAdvServerXL)Activator.GetObject(typeof(ITSpaceServer), serverUrl);
del = new UpdateViewDel(server.RemoveFromView);
try
{
del.BeginInvoke(deadURL, callback, serverUrl);
}
catch (Exception) { }
}
Monitor.Wait(RemoveFromViewLock, 2000);
}
Monitor.Exit(RemoveFromViewLock);
TSpaceAdvManager.RWL.ReleaseWriterLock();
Console.WriteLine("Confirm remove of server " + deadURL + " => " + UpdateViewCounter);
}
