async Task IConsumer <CreateEvent> .Consume(ConsumeContext <CreateEvent> context)
{
var command = context.Message;
using (var session = await repository.BeginSessionFor(command.EventId, false))
{
if (session == null)
{
// throw exception
}
if (!session.IsNewState)
{
// throw concurrency exception
}
var state = session.GetCurrentState();
var events = aggregate.CreateEvent(state, command.EventId, command.Title, command.Description);
session.AddEvents(events);
await session.SaveChanges();
}
}