/// <summary>
/// Creates a candle event subscription.
/// </summary>
/// <remarks>
/// Don't call this method inside any listeners and callbacks of NativeSubscription, NativeConnection,
/// NativeRegionalBook, NativeSnapshotSubscription classes
/// </remarks>
/// <param name="time">Date time in the past.</param>
/// <param name="listener">Candle listener callback.</param>
/// <returns>Subscription object.</returns>
/// <exception cref="ArgumentNullException">Listener is null.</exception>
/// <exception cref="DxException"></exception>
public IDxSubscription CreateSubscription(DateTime?time, IDxCandleListener listener)
{
if (handle == IntPtr.Zero)
{
throw new NativeDxException("not connected");
}
IDxSubscription result = new NativeSubscription(this, time, listener);
subscriptions.Add(result);
return(result);
}
/// <summary>
/// Create Candle event subscription.
/// For rest events use another constructor.
/// </summary>
/// <param name="connection">Native connection pointer.</param>
/// <param name="time">Date time in the past.</param>
/// <param name="listener">Candle event listener.</param>
/// <exception cref="ArgumentException">One of passed parameters is not valid.</exception>
/// <exception cref="DxException"></exception>
public NativeSubscription(NativeConnection connection, DateTime?time, IDxCandleListener listener) :
this(connection, time, EventSubscriptionFlag.Default, listener)
{
}
/// <summary>
/// Create Candle event subscription.
/// For rest events use another constructor.
/// </summary>
/// <param name="connection">Native connection pointer.</param>
/// <param name="time">Date time in the past.</param>
/// <param name="eventSubscriptionFlags">event subscription flags</param>
/// <param name="listener">Candle event listener.</param>
/// <exception cref="ArgumentException">One of passed parameters is not valid.</exception>
/// <exception cref="DxException"></exception>
public NativeSubscription(NativeConnection connection, DateTime?time, EventSubscriptionFlag eventSubscriptionFlags, IDxCandleListener listener)
{
if (listener == null)
{
throw new ArgumentNullException(nameof(listener));
}
connectionPtr = connection.Handler;
eventType = EventType.Candle;
eventListener = listener;
var unixTimestamp = time == null ? 0 : Tools.DateToUnixTime((DateTime)time);
C.CheckOk(eventSubscriptionFlags == EventSubscriptionFlag.Default
? C.Instance.dxf_create_subscription_timed(connectionPtr, eventType, unixTimestamp, out subscriptionPtr)
: C.Instance.dxf_create_subscription_timed_with_flags(connectionPtr, eventType, unixTimestamp,
eventSubscriptionFlags, out subscriptionPtr));
try
{
C.CheckOk(C.Instance.dxf_attach_event_listener_v2(subscriptionPtr, callback = OnEvent, IntPtr.Zero));
}
catch (DxException)
{
C.Instance.dxf_close_subscription(subscriptionPtr);
throw;
}
}