/// <summary>
/// Request processor dequeues wait request and notify respected thread after waiting for requested time
/// </summary>
private void WaitRequestProcessor()
{
Thread.Sleep(2000);
while (true)
{
if (waitRequestQueue.Count > 0)
{
WaitRequest currentRequest;
waitRequestQueue.TryDequeue(out currentRequest);
if (this.label1.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.Invoke(d, new object[] { "Server is waiting for " + currentRequest.WaitSecond + " of client " + currentRequest.ClientName + "." });
}
Thread.Sleep(currentRequest.WaitSecond * 1000);
servedRequest = currentRequest;
//Notify thread
currentRequest.WaitRequestHandle.Set();
}
}
}
/// <summary>
/// Register client, parse http message and wait for requested time peroid
/// </summary>
public void ServeRequest(TcpClient currentClient)
{
TcpClient tcpClientSocket = currentClient;
string clientName = string.Empty;
while (true)
{
try
{
if (tcpClientSocket.Connected)
{
//Get message from socket
NetworkStream networkStream = tcpClientSocket.GetStream();
byte[] message = new byte[tcpClientSocket.ReceiveBufferSize];
networkStream.Read(message, 0, message.Length);
string clientData = System.Text.Encoding.ASCII.GetString(message);
string[] message1 = clientData.Split('\n');
//TcpClient sends empty message while disconnects
if (message[0] == 0)
{
if (this.label1.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
string responseMessage = "Client " + clientName + " has disconnected successfully.";
this.Invoke(d, new object[] { responseMessage });
tcpClientSocket.Close();
}
break;
}
else
{
JObject json = JObject.Parse(message1.Last());
clientName = json["ClientName"].ToString();
if (json["WaitRequest"] == null)
{
if (this.label1.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
string responseMessage = "Client " + json["ClientName"] + " has registered successfully.";
this.Invoke(d, new object[] { responseMessage });
SendMessage(responseMessage, networkStream);
}
}
else
{
int waitSeconds = Convert.ToInt32(json["WaitRequest"]);
SetTextCallback d = new SetTextCallback(SetText);
if (this.label1.InvokeRequired)
{
this.Invoke(d, new object[] { "Client " + json["ClientName"] + " has sent request wait of " + json["WaitRequest"] + "." });
}
//Enque wait request.
EventWaitHandle waitRequestHandle = new AutoResetEvent(false);
WaitRequest waitRequest = new WaitRequest {
ClientName = json["ClientName"].ToString(), WaitSecond = waitSeconds, WaitRequestHandle = waitRequestHandle
};
waitRequestQueue.Enqueue(waitRequest);
//Once request processor serves request from queue it will notify respected thread by triggering event.
//URL:http://www.yoda.arachsys.com/csharp/threads/waithandles.shtml
if (waitRequestHandle.WaitOne())
{
string waitSuccess = "Server waited for client " + clientName + " for " + servedRequest.WaitSecond + " successfully.";
if (this.label1.InvokeRequired)
{
this.Invoke(d, new object[] { waitSuccess });
}
SendMessage(waitSuccess, networkStream);
}
}
}
}
else
{
currentClient.Close();
if (this.label1.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
string responseMessage = "Client " + clientName + " has disconnected successfully.";
this.Invoke(d, new object[] { responseMessage });
}
break;
}
}
catch (Exception ex)
{
if (this.label1.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.Invoke(d, new object[] { ex.Message });
}
}
}
}
