internal ConnectionStateInterceptor(IAdsSession session) : base("ConnectionStateObserverInterceptor")
{
this._synchronizer = new object();
this._connectionState = TwinCAT.ConnectionState.Disconnected;
this._lastSucceeded = DateTime.MinValue;
this._lastAccess = DateTime.MinValue;
this._session = session;
}
private void setState(TwinCAT.ConnectionState newState)
{
TwinCAT.ConnectionState none = TwinCAT.ConnectionState.None;
object obj2 = this._synchronizer;
lock (obj2)
{
none = this._connectionState;
this._connectionState = newState;
}
if (none != this._connectionState)
{
this.OnConnectionStatusChanged(none, newState);
}
}
protected virtual void OnConnectionStatusChanged(TwinCAT.ConnectionState oldState, TwinCAT.ConnectionState newState)
{
if (this.ConnectionStateChanged != null)
{
ConnectionStateChangedReason error = ConnectionStateChangedReason.Error;
if ((newState == TwinCAT.ConnectionState.Connected) && ((oldState == TwinCAT.ConnectionState.Disconnected) || (oldState == TwinCAT.ConnectionState.None)))
{
error = ConnectionStateChangedReason.Established;
}
else if ((newState == TwinCAT.ConnectionState.Connected) && (oldState == TwinCAT.ConnectionState.Lost))
{
error = ConnectionStateChangedReason.Resurrected;
}
else if (newState == TwinCAT.ConnectionState.Lost)
{
error = ConnectionStateChangedReason.Lost;
}
else if (newState == TwinCAT.ConnectionState.Disconnected)
{
error = ConnectionStateChangedReason.Closed;
}
this.ConnectionStateChanged(this, new SessionConnectionStateChangedEventArgs(error, newState, oldState, this._session, this._session.Connection, null));
}
}