public SocketChangeTracker(ChangeTrackerOptions options) : base(options)
{
if (options.Mode == ChangeTrackerMode.LongPoll)
{
Continuous = true;
}
tokenSource = new CancellationTokenSource();
_responseLogic = ChangeTrackerResponseLogicFactory.CreateLogic(this);
_responseLogic.OnCaughtUp = () => Misc.IfNotNull(Client, c => c.ChangeTrackerCaughtUp(this));
_responseLogic.OnChangeFound = (change) =>
{
if (!ReceivedChange(change))
{
Log.To.ChangeTracker.W(Tag, "Received unparseable change from server {0}", new LogJsonString(change));
}
};
_responseLogic.OnFinished = RetryOrStopIfNecessary;
}
// Called when the web socket connection is closed
private void OnClose(object sender, CloseEventArgs args)
{
if (_client != null)
{
if (args.Code == (ushort)CloseStatusCode.ProtocolError)
{
// This is not a valid web socket connection, need to fall back to regular HTTP
CanConnect = false;
Stopped();
}
else
{
Log.To.ChangeTracker.I(Tag, "{0} remote {1} closed connection ({2} {3})",
this, args.WasClean ? "cleanly" : "forcibly", args.Code, args.Reason);
_responseLogic = new WebSocketLogic();
Backoff.DelayAppropriateAmountOfTime().ContinueWith(t => _client.ConnectAsync());
}
}
else
{
Log.To.ChangeTracker.I(Tag, "{0} is closed", this);
Stopped();
}
}