public async Task AppendEventsAsync(AppendEvents model)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
await _unitOfWork.CommitOrUndoAsync(async() =>
{
await _validatorFactory.GetValidator <AppendEvents>().ValidateAndThrowAsync(model);
var stream = await _unitOfWork.StreamRepository.GetStreamByNameAsync(model.StreamName);
if (stream == null)
{
stream = new Repository.Entities.Stream
{
Name = model.StreamName,
Version = 0
};
await _unitOfWork.StreamRepository.AddStreamAsync(stream);
}
if (stream.Version != model.ExpectedVersion)
{
throw new ConcurrencyException($"Concurrency error - expected stream version to be {stream.Version} but got {model.ExpectedVersion}");
}
var events =
model.Events.Select(e => new Repository.Entities.Event
{
StreamId = stream.StreamId,
Type = e.Type,
Data = e.Data,
Version = ++stream.Version
}).ToList();
await _unitOfWork.StreamRepository.AddEventsAsync(events);
await _unitOfWork.StreamRepository.UpdateStreamAsync(stream);
});
}
public static Stream FromEntity(this Repository.Entities.Stream entity)
=> new Stream
{
Name = entity.Name, Version = entity.Version, CreatedAt = entity.CreatedAt, UpdatedAt = entity.UpdatedAt
};
