private static IDisposable SubscribeToReceiveMessages <THandler>(
IEventHandlerBinder binder,
THandler handler,
ServiceBusSettings settings,
Configuration configuration,
Dictionary <Type, QueueClient> queues) where THandler : class
{
Type eventType = ((dynamic)binder).EventType;
var queueName = string.Format("{0}_on_{1}.{2}",
EventHandler.Name(handler),
eventType.AggregateTypeForEventType().Name,
eventType.EventName());
var bus = new InProcessEventBus(errorSubject: (ISubject <EventHandlingError>)configuration.EventBus.Errors);
var eventBusSubscription = binder.SubscribeToBus(handler, bus);
var receive = SimulatedReceive;
if (receive != null)
{
var receiveSubscription = receive.Subscribe(e => bus.PublishAsync(e).Subscribe(_ => { }, ex => bus.PublishErrorAsync(new EventHandlingError(ex, @event: e))));
return(new CompositeDisposable(eventBusSubscription,
receiveSubscription));
}
var queueClient = settings.CreateQueueClient(
queueName,
settings.ConfigureQueue);
// starting listening on the queue for incoming events
queueClient.OnMessage(msg =>
{
var storedEvent = msg.GetBody <string>()
.FromJsonTo <StoredEvent>();
var @event = Serializer.DeserializeEvent(
aggregateName: storedEvent.AggregateName,
eventName: storedEvent.EventName,
body: storedEvent.Body,
aggregateId: storedEvent.AggregateId,
sequenceNumber: storedEvent.SequenceNumber,
timestamp: storedEvent.Timestamp);
bus.PublishAsync(@event).Subscribe(
_ => msg.Complete(),
ex => bus.PublishErrorAsync(new EventHandlingError(ex, @event: @event)));
});
queues[((dynamic)binder).EventType] = queueClient;
return(new CompositeDisposable(eventBusSubscription, Disposable.Create(queueClient.Close)));
}
internal static QueueClient CreateQueueClient(ServiceBusSettings settings)
{
return(settings.CreateQueueClient(
"ScheduledCommands",
q =>
{
q.SupportOrdering = true;
q.RequiresSession = true;
q.LockDuration = TimeSpan.FromMinutes(5);
q.MaxDeliveryCount = (int)(TimeSpan.FromDays(45).Ticks / q.LockDuration.Ticks);
q.EnableDeadLetteringOnMessageExpiration = false;
}));
}
internal static QueueClient CreateQueueClient(ServiceBusSettings settings)
{
return settings.CreateQueueClient(
"ScheduledCommands",
q =>
{
q.SupportOrdering = true;
q.RequiresSession = true;
q.LockDuration = TimeSpan.FromMinutes(5);
q.MaxDeliveryCount = (int) (TimeSpan.FromDays(45).Ticks / q.LockDuration.Ticks);
q.EnableDeadLetteringOnMessageExpiration = false;
});
}
