// http://stackoverflow.com/questions/7690520/c-sharp-networking-tcpclient
async void TcpListenerLoop()
{
try
{
//Console.WriteLine($"*TcpListener is starting on port {m_privateIP}:{m_port}.");
Utils.Logger.Info($"*TcpListener is starting on port {m_privateIP}:{m_port}.");
m_tcpListener = new System.Net.Sockets.TcpListener(IPAddress.Parse(m_privateIP), m_port);
m_tcpListener.Start();
while (true)
{
var tcpListenerCurrentClientTask = m_tcpListener.AcceptTcpClientAsync();
var tcpClient = await tcpListenerCurrentClientTask; // await Task is blocking. OK. When App is exiting gracefully, there is an Exception: no problem. Let VS swallow it.
Console.WriteLine($"TcpListenerLoop.NextClientAccepted.");
Utils.Logger.Info($"TcpListenerLoop.NextClientAccepted.");
if (Utils.MainThreadIsExiting?.IsSet ?? false)
{
return; // if App is exiting gracefully, don't start new thread
}
m_tcpClientQueue.Add(tcpClient); // If it is a long processing, e.g. reading the TcpClient, do it in a separate thread. If it is just added to the queue, don't start a new thread
//(new Thread((x) => ReadTcpClientStream(x)) { IsBackground = true }).Start(tcpClient); // read the BinaryReader() and deserialize in separate thread, so not block the TcpListener loop
}
}
catch (Exception e) // Background thread can crash application. A background thread does not keep the managed execution environment running.
{
if (Utils.MainThreadIsExiting?.IsSet ?? false)
{
return; // when App is exiting gracefully, this Exception is not a problem
}
Utils.Logger.Error("TcpListenerLoop(): Not expected Exception. We send email by StrongAssert and rethrow exception, which will crash App. TcpListenerLoop. " + e.Message + " ,InnerException: " + ((e.InnerException != null) ? e.InnerException.Message : ""));
StrongAssert.Fail(Severity.ThrowException, "TcpListenerLoop(): Not expected Exception. We send email by StrongAssert and rethrow exception, which will crash App. TcpListenerLoop. VirtualBroker: manual restart is needed.");
throw; // if we don't listen to TcpListener any more, there is no point to continue. Crash the App.
}
}
public void ScheduleTrigger(SqTrigger p_trigger, bool p_isMarketHoursValid, bool p_isMarketTradingDay, DateTime p_marketOpenTimeUtc, DateTime p_marketCloseTimeUtc)
{
DateTime?proposedTime = CalcNextTriggerTime(p_trigger, p_isMarketHoursValid, p_isMarketTradingDay, p_marketOpenTimeUtc, p_marketCloseTimeUtc);
if (proposedTime != null)
{
bool doSetTimer = true;
if (p_trigger.NextScheduleTimeUtc != null)
{
TimeSpan timeSpan = ((DateTime)p_trigger.NextScheduleTimeUtc > (DateTime)proposedTime) ? (DateTime)p_trigger.NextScheduleTimeUtc - (DateTime)proposedTime : (DateTime)proposedTime - (DateTime)p_trigger.NextScheduleTimeUtc;
if (timeSpan.TotalMilliseconds < 1000.0) // if the proposedTime is not significantly different that the scheduledTime
{
doSetTimer = false;
}
}
if (doSetTimer)
{
p_trigger.NextScheduleTimeUtc = proposedTime;
StrongAssert.True((DateTime)p_trigger.NextScheduleTimeUtc > DateTime.UtcNow, Severity.ThrowException, "nextScheduleTimeUtc > DateTime.UtcNow");
p_trigger.Timer.Change((DateTime)p_trigger.NextScheduleTimeUtc - DateTime.UtcNow, TimeSpan.FromMilliseconds(-1.0));
}
}
// Warn() temporarily to show it on Console
//Console.WriteLine($"{DateTime.UtcNow.ToString("dd'T'HH':'mm':'ss")}: Task '" + p_trigger.TriggeredTask.Name + "' next time: " + ((p_trigger.NextScheduleTimeUtc != null) ? ((DateTime)p_trigger.NextScheduleTimeUtc).ToString("dd'T'HH':'mm':'ss") : "null"));
Utils.Logger.Info("Trigger '" + String.Concat(p_trigger.SqTask !.Name, ".", p_trigger.Name) + "' next time: " + ((p_trigger.NextScheduleTimeUtc != null) ? ((DateTime)p_trigger.NextScheduleTimeUtc).ToString("dd'T'HH':'mm':'ss") : "null"));
}