private Task PublishPurchaseFailure(SellTicketsRequest request, string concertName)
{
return(_eventPublisher.Publish(new PurchaseFailedEvent(
Guid.NewGuid().ToString(),
Guid.NewGuid().ToString(),
request.ConcertId,
concertName,
request.BuyerId,
request.Quantity)));
}
private void PublishDomainEvents(IEnumerable <DomainEvent> domainEvents)
{
foreach (var domainEvent in domainEvents)
{
_eventPublisher.Publish(domainEvent);
}
}
/// <inheritdoc />
public void Publish <T>(
T @event,
[CallerMemberName] string callerMemberName = "",
[CallerFilePath] string callerFilePath = "",
[CallerLineNumber] int callerLineNumber = -1) where T : TelemetryEvent
{
if (TopicPublisher != null && @event is DomainEvent)
{
TopicPublisher.Publish(@event).Wait();
}
if (@event is TelemetryEvent telemetryEvent)
{
telemetryEvent.CallerMemberName = callerMemberName;
telemetryEvent.CallerFilePath = callerFilePath;
telemetryEvent.CallerLineNumber = callerLineNumber;
}
if (@event is TimedTelemetryEvent timedEvent)
{
timedEvent.End();
}
TelemetryStream.OnNext(@event);
}
public async Task CreateConcert(CreateConcertRequest request)
{
var concert = new Concert(request.Name, new TicketQuantity(request.SeatingCapacity));
await _concertRepository.AddConcert(concert);
await _eventPublisher.Publish(new ConcertCreatedEvent(Guid.NewGuid().ToString(), concert.Id, concert.Name, concert.SeatingCapacity));
}
public async Task SaveEvents(Guid aggregateId, IEnumerable <Event> events, int expectedVersion)
{
// Simulate I/O, avoid blocking thread pool thread
await Task.CompletedTask;
ConcurrentBag <EventDescriptor> eventDescriptors;
// try to get event descriptors list for given aggregate id
// otherwise -> create empty dictionary
if (!_current.TryGetValue(aggregateId, out eventDescriptors))
{
eventDescriptors = new ConcurrentBag <EventDescriptor>();
_current.TryAdd(aggregateId, eventDescriptors);
}
// check whether latest event version matches current aggregate version
// otherwise -> throw exception
else if (eventDescriptors.Last().Version != expectedVersion && expectedVersion != -1)//[eventDescriptors.Count - 1]
{
throw new ConcurrencyException();
}
var i = expectedVersion;
// iterate through current aggregate events increasing version with each processed event
foreach (var @event in events)
{
i++;
@event.Version = i;
// push event to the event descriptors list for current aggregate
eventDescriptors.Add(new EventDescriptor(aggregateId, @event, i));
// publish current event to the bus for further processing by subscribers
await _publisher.Publish(@event);
}
}
public void Save(Guid aggregateId, IEnumerable <IEvent> events, int expectedVersion)
{
List <EventInfo> eventDescriptors;
if (!_events.TryGetValue(aggregateId, out eventDescriptors))
{
eventDescriptors = new List <EventInfo>();
_events.Add(aggregateId, eventDescriptors);
}
else if (eventDescriptors[eventDescriptors.Count - 1].Version != expectedVersion && expectedVersion != -1)
{
//this prevents us from trying to duplicate the same event to the event store
//this could happen in a multi-threaded environment or if you are
//using a messageing framework with at-least-once delivery semantics
throw new ConcurrencyException();
}
var i = expectedVersion;
foreach (var @event in events)
{
i++;
eventDescriptors.Add(new EventInfo(aggregateId, @event, i));
_serviceBus.Publish(@event);
}
}
protected override IEnumerable <IEvent> Accept(IEvent @event)
{
log.DebugFormat("Publishing {0} to {1} publiser", @event.GetType(), publisher.GetType());
publisher.Publish(@event);
return(ListOfEvents.EmptyList());
}
public void Handle(ChangeNameCommand message)
{
if (message.IsValidToHandle)
{
//once its actually completed, let anyone who cares know that this has happened
_bus.Publish(new NameChangedEvent(message.NewFirstname, message.NewLastname));
}
}
public bool TryAcceptPayment(int orderNumber)
{
Messages.ReceiveOrder message;
if (false == AwaitingPayment.TryRemove(orderNumber, out message))
{
return(false);
}
message.Order.Receipt = new JObject();
next.Publish(new Messages.OrderPaid(message.Order, message.CorrelationId, message.MessageId, message.TimeToLive));
return(true);
}
public void PlaceOrder(int orderNumber, int table, params Order.Item[] items)
{
var tookOrderOn = DateTime.UtcNow;
var order = new Order(orderNumber)
{
Table = table, Waiter = name, TookOrderOn = tookOrderOn
};
items.ForEach(order.Add);
var customerWalksOutAt = tookOrderOn.AddSeconds(30);
if (random.NextDouble() > 0.75)
{
next.Publish(new Messages.OrderPlaced(order, customerWalksOutAt));
}
else
{
next.Publish(new Messages.SuspectOrderPlaced(order, customerWalksOutAt));
}
}
public void Handle(Messages.PrepareFood message)
{
foreach (var item in message.Order.Items)
{
item.Ingredients = BullshitRecipeDatabase[item.Plate];
}
var cookTime = TimeSpan.FromSeconds(random.NextDouble() / efficiency);
Thread.Sleep(cookTime);
message.Order.CookedOn = DateTime.UtcNow;
message.Order.Chef = name;
next.Publish(new Messages.FoodPrepared(message.Order, message.CorrelationId, message.MessageId, message.TimeToLive));
}
public void Handle(Messages.TotalOrder message)
{
var order = message.Order;
foreach (var item in order.Items)
{
item.Price = PricesDatabase[item.Plate];
}
order.Tax = order.Subtotal * TaxRate;
order.Total = order.Subtotal + order.Tax + order.Tip;
next.Publish(new Messages.OrderTotalled(order, message.CorrelationId, message.MessageId, message.TimeToLive));
}
/// <summary>
/// Dispatch all events within the specified <paramref name="commit"/>.
/// </summary>
/// <param name="commit">The commit instance to be dispatched.</param>
private void DispatchCommit(Commit commit)
{
var commitId = commit.Id.GetValueOrDefault();
var events = commit.Events;
for (var i = 0; i < events.Count; i++)
{
var e = events[i];
var version = new EventVersion(commit.Version, events.Count, i + 1);
eventPublisher.Publish(commit.Headers, new EventEnvelope(commit.CorrelationId, commit.StreamId, version, e));
}
if (markDispatched)
{
eventStore.MarkDispatched(commitId);
}
}
private async Task PublishEvents(IHoldAllConfiguration configuration, ItemWithType[] events, CancellationToken cancellationToken = default(CancellationToken))
{
bool hasInterceptors = configuration.HasInterceptors;
ItemWithType @event;
for (var i = 0; i < events.Length; i++)
{
@event = events[i];
TryCallInterceptor(hasInterceptors, configuration.Interceptors, @event,
(interc, e, et, s, st) => interc.BeforePublish(e, et, s, st));
//We await each one to guarantee ordering of publishing, even though it would have been more performant
// to publish and await all of them with a WhenAll
await eventPublisher.Publish(events[i], cancellationToken);
TryCallInterceptor(hasInterceptors, configuration.Interceptors, @event,
(interc, e, et, s, st) => interc.AfterPublish(e, et, s, st));
}
}
public AlarmClock(IPublishEvents bus)
{
workerThread = new Thread(
_ =>
{
while (!stopped)
{
lock (alarmLock)
{
var now = DateTime.UtcNow;
var shouldSend = alarms.Where(x => x.AlarmTime > now).ToList();
foreach (var alarm in shouldSend)
{
bus.Publish(alarm.Message);
alarms.Remove(alarm);
}
}
Thread.Sleep(1);
}
});
}
public void Push(IEvent @event)
{
publisher.Publish(@event);
}
/// <summary>
/// Publishes the specified <paramref name="payload"/> on the underlying message bus.
/// </summary>
/// <param name="headers">The set of message headers associated with the event.</param>
/// <param name="payload">The event payload to be published.</param>
public void Publish(IEnumerable <Header> headers, EventEnvelope payload)
{
statistics.IncrementQueuedEvents();
bus.Publish(headers, payload);
}
