/// <summary>
/// Make sure that a valid order ID is received from JTS.
/// Must be called before connection requested and awaited before a call to <see cref="GetNewOrderId"/>.
/// </summary>
/// <returns>
/// An observable stream that completes when an order ID is available.
/// The stream value is the next valid order ID as reported by TWS.
/// Note that this value is useful for debugging purposes only.
/// For new orders, use <see cref="GetNewOrderId"/>.
/// </returns>
public IObservable <int> OrderIdAvailable()
{
var subj = new AsyncSubject <int>();
_orderIdSubj = subj;
return(subj.MergeErrors(
Errors.Where(err => err.Item2.IsError())
.Select(err => new ApplicationException(err.Item2.Message))
.AsError()
));
}
