/// <summary>
/// Creates a subscription.
/// </summary>
/// <param name="subscription">Subscription to create.</param>
/// <param name="state">Additional metadata to associate with the artifact. Implementations can interpret this value, or ignore it.</param>
/// <param name="token">Token to observe for cancellation of the request.</param>
/// <returns>Task to await the acknowledgement of the creation of the subscription, or an exception.</returns>
protected override Task CreateSubscriptionAsyncCore(IAsyncReactiveQubscription subscription, object state, CancellationToken token)
{
if (subscription == null)
{
throw new ArgumentNullException(nameof(subscription));
}
if (!TryGetUriFromKnownResource(subscription, out Uri uri))
{
throw new InvalidOperationException("Unknown subscription object. Could not find a URI identity for the specified subscription object. Did you obtain the subscription object from SubscribeAsync or GetSubscription?");
}
return(_provider.CreateSubscriptionAsync(uri, subscription.Expression, state, token));
}
