public async Task Save(IEventSourceAggregate aggregate, CancellationToken cancellationToken = default)
{
var streamStoreTask = _streamStoreFactory.GetStreamStore(cancellationToken: cancellationToken);
aggregate = aggregate.ThrowIfNull(nameof(aggregate));
var events = aggregate.GetUncommittedEvents().ToArray();
if (!events.Any())
{
return;
}
var streamId = GetStreamId(aggregate);
var originalVersion = aggregate.Version - events.Length;
var expectedVersion = originalVersion == 0
? ExpectedVersion.NoStream
: originalVersion - 1;
var messagesToPersist = events.Select(evt => evt.ToMessageData()).ToArray();
var streamStore = await streamStoreTask.ConfigureAwait(false);
await streamStore.AppendToStream(streamId, expectedVersion, messagesToPersist, cancellationToken);
// We get all the way through the process, then we clear the uncommitted events. They are now processed, they are no longer *un*committed
aggregate.ClearUncommittedEvents();
}
public AggregateDeletedException(IEventSourceAggregate aggregate) : base(
$"Aggregate {aggregate.GetType().Name} with identifier {aggregate.Id} was in a deleted state")
{
}
public string GetStreamId(IEventSourceAggregate aggregate) => GenerateStreamId(aggregate.GetType().Name, aggregate.Id);
