Sync-Async boundary
Why asynchronous?
Why does adding an item take so long?
How do I deduplicate AddItem messages?
How do I deduplicate Submit messages?
public Task Handle(SendSubmit message,
IMessageHandlingContext context)
{
var cart = repository.Load(message.Id);
if (cart.IsSubmitted)
{
log.Info("Duplicate");
return;
}
cart.Submitted = true;
context.Send(new Submit());
}
public Task Handle(SendSubmit message,
IMessageHandlingContext context)
{
var cart = repository.Load(message.Id);
if (cart.IsSubmitted)
{
log.Info("Duplicate");
return;
}
cart.Submitted = true;
context.Send(new Submit());
}
State machine deduplication
