public static void OnConnectionStatusChanged(ApiConnectionStatus status, string type)
{
_apiConnectionStatus = status;
ConnectionStatusHandler handler = ConnectionStatusChanged;
if (handler != null)
{
handler(status, type);
}
}
public static void OnEventsSessionStatusChanged(bool started, Exception e)
{
if (e != null)
{
if (_apiConnectionStatus != ApiConnectionStatus.Recovering)
{
OnConnectionStatusChanged(ApiConnectionStatus.Faulted, null);
RecoverApiConnection(e.Message, e.InnerException);
}
}
else if (_apiConnectionStatus == ApiConnectionStatus.Recovering && started)
{
_apiConnectionStatus = ApiConnectionStatus.Recovered;
}
else if (_apiConnectionStatus == ApiConnectionStatus.Disconnected && started)
{
OnConnectionStatusChanged(ApiConnectionStatus.Streaming, "Events");
}
}
protected virtual void OnConnectionStatusChanged(ApiConnectionStatus status, string type)
{
if (status == ApiConnectionStatus.Connected)
{
AddAlgorithmMessage("OANDA Api connection status is: Connected.", true, TraceEventType.Information);
}
else if (status == ApiConnectionStatus.Streaming)
{
AddAlgorithmMessage(string.Format("OANDA Api connection status is: Streaming {0}.", type), true, TraceEventType.Information);
}
else if (status == ApiConnectionStatus.Faulted)
{
AddAlgorithmMessage("OANDA Api connection status is: Faulted.", true, TraceEventType.Information);
}
else if (status == ApiConnectionStatus.Recovered)
{
AddAlgorithmMessage("OANDA Api connection status is: Recovered.", true, TraceEventType.Information);
}
else if (status == ApiConnectionStatus.Disconnected)
{
AddAlgorithmMessage("OANDA Api connection status is: Disconnected.", true, TraceEventType.Information);
}
if (_instance.Status == (short?)AlgorithmStatus.Running)
{
if (status == ApiConnectionStatus.Connected)
{
// api connection restored
if (_lastConnectionStatus == ApiConnectionStatus.Recovered)
{
// get missed account activity
UpdateStrategyTransactions().Wait();
UpdateOrdersAndTrades().Wait();
}
}
}
OnConnectionStatusChangedAction(status);
_lastConnectionStatus = status;
}
protected override void OnConnectionStatusChangedAction(ApiConnectionStatus status)
{
if (_instance.Status == (short?)AlgorithmStatus.Running)
{
if (status == ApiConnectionStatus.Faulted)
{
_chartsInitialized = false;
}
else if (status == ApiConnectionStatus.Recovered)
{
}
else if (status == ApiConnectionStatus.Connected)
{
// api connection restored
if (_lastConnectionStatus == ApiConnectionStatus.Recovered && !_chartsInitialized)
{
InitializeCharts();
}
}
}
}
private static async Task RecoverApiConnection(string reason, Exception e)
{
bool connectionRecovered = false;
OnConnectionRecovering(string.Format("Fault Error: {0}", reason));
if (e != null)
{
OnConnectionRecovering(string.Format("Exception Error: {0}", e.Message));
}
await Task.Run(() =>
{
short count = 1;
while (!connectionRecovered)
{
string message = "";
if (_apiConnectionStatus == ApiConnectionStatus.Faulted ||
_apiConnectionStatus == ApiConnectionStatus.Recovering)
{
_apiConnectionStatus = ApiConnectionStatus.Recovering;
if (count > 1)
{
OnConnectionRecovering("Event stream re-start attempt failed.");
}
Task.Delay(TimeSpan.FromMilliseconds(5000)).Wait();
message = string.Format("OANDA connection recovery attempt: {0}", count.ToString());
OnConnectionRecovering(message);
message = StopEventsStream();
OnConnectionRecovering(message);
// 5 secs
Task.Delay(TimeSpan.FromMilliseconds(5000)).Wait();
OnConnectionRecovering("Attempting to re-start events stream ...");
StartEventsStreamAsync();
// 25 secs .. to allow time for a hearbeat
// http://developer.oanda.com/rest-live/streaming/#eventsStreaming
Task.Delay(TimeSpan.FromMilliseconds(25000)).Wait();
count++;
}
if (_apiConnectionStatus == ApiConnectionStatus.Recovered)
{
connectionRecovered = true;
OnConnectionRecovering("OANDA connection recovered.");
OnConnectionStatusChanged(ApiConnectionStatus.Recovered, null);
Task.Delay(TimeSpan.FromMilliseconds(1500)).Wait();
OnConnectionStatusChanged(ApiConnectionStatus.Connected, null);
}
}
});
}
protected abstract void OnConnectionStatusChangedAction(ApiConnectionStatus status);
