/// <summary>
/// Sendings this instance.
/// </summary>
private void SwitchSending()
{
//try
//{
while (!this.Client.Connected)
{
Thread.SpinWait(100);
}
NetworkStream stream = this.Client.GetStream();
char[] splitOpt = { ',' };
String[] dstMsg;
WriteStream caller = new WriteStream(ParentNode.WriteToNetworkStream);
bool resend = true;
while (this.toSend.Count > 0)
{
lock (this.toSend)
{
dstMsg = this.toSend.Dequeue().Split(splitOpt, 2);
}
SwitchMessage msg = new SwitchMessage();
msg.EncodeMessage(dstMsg[0], this.ParentNode.Name, dstMsg[1]);
//Console.WriteLine(" : " + msg.Info + " : Node " + this.name + " is sending to Node " + dstMsg[0] + " this message " );
while (resend)
{
lock (stream)
{
if (stream.CanWrite)
{
caller.BeginInvoke(stream, msg, null, null);
}
else
{
Console.WriteLine("Node " + this.ParentNode.Name + " cannot write via switch.");
}
}
try
{
//Sleep until an ack is recieved.
Thread.Sleep(10000);
}
catch (ThreadInterruptedException)
{
resend = false;
}
if(this.doneSending == true)
{
resend = false;
}
}
resend = true;
if (this.doneSending == true)
{
break;
}
}
//Console.WriteLine("Sender thread for node " + this.name + " exiting.");
SwitchMessage done = new SwitchMessage();
done.EncodeHiddenComm(GlobalConst.serverName, GlobalConst.serverName);
this.doneSending = true;
while (stream.CanWrite)
{
try
{
stream.Write(done.ToSend, 0, done.ToSend.Length);
Thread.Sleep(1000);
}
catch (System.IO.IOException)
{
break;
}
catch (ThreadInterruptedException)
{
;
}
}
}
/// <summary>
/// Listens for this instance.
/// </summary>
private void SwitchListening()
{
try
{
NetworkStream clientStream = this.Client.GetStream();
byte[] message;
int bytesRead;
WriteStream caller = new WriteStream(this.parentNode.WriteToNetworkStream);
while (true)
{
bytesRead = 0;
message = GlobalConst.getSpaceByteArray(GlobalConst.BUFSIZE);
lock (this.toSend)
{
if (this.toSend.Count < 1)
{
clientStream.ReadTimeout = 30000;
}
}
try
{
//blocks until a client sends a message
bytesRead = clientStream.Read(message, 0, GlobalConst.BUFSIZE);
}
catch
{
//a socket error has occured
Console.WriteLine("Socket error on node " + this.parentNode.Name);
break;
}
if (bytesRead == 0)
{
//the client has disconnected from the server
Console.WriteLine("Node " + this.parentNode.Name + " has disconnected from the switch.");
break;
}
SwitchMessage msg = new SwitchMessage();
bool msgOk = msg.Decode(message);
Console.WriteLine("Got message on switch node " + this.parentNode.Name);
if(!msgOk)
{
}
else if (msg.Ack)
{
if (SenderThread.ThreadState.Equals(ThreadState.WaitSleepJoin))
{
//Notify the sender thread that the receiving node did get it.
SenderThread.Interrupt();
}
else
{
//Console.WriteLine("Node {0} sent to node {1} (really {2}) an ack when it wasn't supposed to!", msg.Sender, msg.Destination, this.name);
}
}
else
{
//message has successfully been received
parentNode.writeOutMessage(msg);
SwitchMessage ackMsg = new SwitchMessage();
ackMsg.EncodeHiddenComm(msg.Sender, msg.Destination);
lock (clientStream)
{
if (clientStream.CanWrite)
{
caller.BeginInvoke(clientStream, ackMsg, null, null);
}
else
{
Console.WriteLine("Node " + this.ParentNode.Name + " can't send an ack.");
}
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
if(!this.doneSending)
{
this.senderThread.Abort();
this.doneSending = true;
}
this.doneReceiving = true;
while(!this.parentThread.ThreadState.Equals(ThreadState.WaitSleepJoin))
{
Thread.Sleep(100);
}
this.parentThread.Interrupt();
//this.client.Close();
}
