public async Task <Cow> Handle(CreateCowCommand request, CancellationToken cancellationToken)
{
var model = new Cow {
FarmId = request.FarmId, State = request.State
};
await _eventRepository.CreateAsync(model);
await _snapShotRepository.SaveAsync(model);
return(model);
}
//Idempotent method
public async Task <Unit> Handle(UpdateCowCommand request, CancellationToken cancellationToken)
{
var model = await _snapShotRepository.GetAsync(request.Id);
if (model == default || (model.FarmId == request.FarmId && model.State == request.State))
{
return(Unit.Value);
}
model.FarmId = request.FarmId;
model.State = request.State;
await _snapShotRepository.SaveAsync(model);
await _eventRepository.UpdateAsync(model);
return(Unit.Value);
}
