private Task <IEventStream> SubscribeAsync(
IServiceProvider services,
EventDescription @event)
{
IEventRegistry eventRegistry =
(IEventRegistry)services.GetService(typeof(IEventRegistry));
if (eventRegistry == null)
{
throw new QueryException(new QueryError(
"Register a event registry as service in order " +
"to use subsciptions."));
}
return(eventRegistry.SubscribeAsync(@event));
}
private static async ValueTask <IAsyncEnumerable <object> > DefaultSubscribeResolverAsync(
IResolverContext resolverContext)
{
EventDescription eventDescription = CreateEvent(resolverContext);
IServiceProvider services = resolverContext.Service <IServiceProvider>();
IEventRegistry eventRegistry = services.GetService <IEventRegistry>();
if (eventRegistry == null)
{
throw new QueryException(
ErrorBuilder.New()
.SetMessage(CoreResources.SubscriptionExecutionStrategy_NoEventRegistry)
.Build());
}
return(await eventRegistry.SubscribeAsync(eventDescription));
}
public Task SubscribeOneConsumer_SendMessage_ConsumerReceivesMessage()
{
return(TryTest(async() =>
{
// arrange
var cts = new CancellationTokenSource(30000);
var eventDescription = new EventDescription(
Guid.NewGuid().ToString());
// act
IEventStream consumer = await _registry
.SubscribeAsync(eventDescription);
var outgoing = new EventMessage(eventDescription, "bar");
await _sender.SendAsync(outgoing);
// assert
IEventMessage incoming = await consumer.ReadAsync(cts.Token);
Assert.Equal(outgoing.Payload, incoming.Payload);
}));
}