/// <summary>
/// Persist aggregate to the event store and publish the events.
/// </summary>
/// <param name="aggregateRoot">Aggregate to persist.</param>
public void Save(TAggregate aggregateRoot)
{
// Get a copy of the uncommited domain events before saving.
IDomainEventStream <TAggregateId> domainEventStreamToSave = aggregateRoot.GetUncommitedDomainEvents();
_domainEventStore.Save(aggregateRoot);
// No need to await. Any publish errors will be communicated through OnError event.
// Not passing cancellation token since event notification should not be cancelled.
Task publishTask = PublishDomainEventsAsync(domainEventStreamToSave);
}
public void Save <T>(T aggregate, SessionInfo sessionInfo, int?expectedVersion = null) where T : AggregateRoot
{
if (expectedVersion != null && _domainEventStore.Get(aggregate.Id, expectedVersion.Value).Any())
{
throw new ConcurrencyException(aggregate.Id);
}
var changes = aggregate.FlushUncommitedChanges().ToArray();
if (changes.Any())
{
_domainEventStore.Save(changes, sessionInfo);
_domainEventPublisher.Publish(changes, sessionInfo.TrackingId);
}
}
public void Should_Append_To_Domain_Event_Store()
{
IDomainEventStore <TestAggregate, Guid> eventStore = Factory.CreateEventStore <TestAggregate, Guid>();
// Create aggregate.
TestAggregate aggregate = new TestAggregate(Guid.NewGuid());
eventStore.Save(aggregate);
IDomainEventStream <Guid> stream = eventStore.GetDomainEventStream(aggregate.Id);
var fromStream = new TestAggregate(stream);
Assert.NotNull(stream);
Assert.Equal(aggregate.Id, fromStream.Id);
// 1 domain event in total: Created event.
Assert.Equal(1, stream.DomainEventCount);
}
public void Should_Retrieve_Aggregate_Stream()
{
IDomainEventStore <TestAggregate, Guid> eventStore = Factory.CreateEventStore <TestAggregate, Guid>();
// Create and modify aggregate.
TestAggregate aggregate = new TestAggregate(Guid.NewGuid());
aggregate.ExecuteSomeOperation("I was modified!~");
eventStore.Save(aggregate);
IDomainEventStream <Guid> stream = eventStore.GetDomainEventStream(aggregate.Id);
Assert.NotNull(stream);
Assert.Equal(aggregate.Id, stream.AggregateId);
// 2 domain events in total: Created + Modified events.
Assert.Equal(2, stream.DomainEventCount);
// Stream starts from version 1 to 2.
Assert.Equal(1, stream.BeginVersion);
Assert.Equal(2, stream.EndVersion);
}
