Domain-Driven Design Community

Hi Mosh, I think part of the answer lies with why a command would fail. If you are sending a valid command the chances are pretty good that it will succeed.

Thanks. Yes you are right, but I have a custom ORM implemented here so database hits are a bit different in my project. I ran a test for a Mission with 10

One small thing here. Your assesment of db hits: 1- 1 read to get the Mission 2- 1 write to save the Mission 3- 5 reads to get each Request 4- 5 writes to save

Hi guys, I've noticed that in most implementations of CQRS, commands are sent over a bus in an asynchronous manner. Whilst an application built with this

Not sure if my previous message was posted properly or we have "Eventual Consistency" along with "CQRS" in Yahoo groups that doesn't show me my post straight

Good point, but we've had a long discussion about my Mission and Request Entities and I think we all came to this conclusion that these are 2 separate

Mosh, This was also one of my concerns when I started looking at DDD. Even though I am not fully employing it right now (only certain parts), I have to point

This is an appropriate time to ask yourself if your aggregate boundaries are correct. If you are reading and changing multiple aggregates because your

Hello, I know this issue might be covered before but I couldn't find any posts specifically targeting what I'm gonna ask. So, please bear with me if this is an

Interesting point... I don't know what I was assuming because they are 2 different Aggregates, they are in 2 different BCs!! I thin you're right. Can you just

Thanks Nuno, very clear. :)

... Use another service then. Services are defined on top of domain models. Are you saying that it is not part of the declaration BC? If that is the case I

... Because we see them as two separate business processes that can be handled by different people. BTW, it's not registration, it's just requesting a

... I think this is an area where we have different preferences. I always prefer to have the requests go from the presentation layer to an application service

Hi, ... Yes that is a popular way to do it. ... You have two solutions: 1) You can guarantee that job gets and events are handled in the same transactions.

... I meant either way the house does not robbed. Nuno

Hi Greg, ... Yes our perception is either correct or incorrect. Is that eventual consistency? More revealing is the fact businesses don't decide based on

Nuno I look at my cup it is empty right now. It takes my brain more than 150 ms to even perceive that I am seeing a cup. In this time the state of the cup

Not dangerous. If they are out of sync in such a way that the command would break invariants, the command would be rejected/not be executed. What if the

If you are referring to your 2 entities Mission and Request, they should really be inside a single BC, not separate ones. At least that's what I think. enjoy,