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Messages 13682 - 13711 of 13711   Oldest  |  < Older  |  Newer >  |  Newest
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13682
Security can be its own bounded context - yours is one such case. BTW, multiple bounded contexts can be running within a given process. -- Udi Dahan From:...
Udi Dahan
udidahan7
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Jul 6, 2009
9:21 pm
13683
... Does anybody know of diagrams which help show such DDD architectural principles visually? Seems like that could be helpful to newbies. sincerely....
Raoul Duke
theraoulduke
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Jul 6, 2009
9:25 pm
13684
Hmm... I think know what you mean here. Because there are specific model data requirements that act as the inputs to the security decisions (e.g. The attribute...
gmurray_alt
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Jul 6, 2009
9:52 pm
13685
I think Robert Ream said it well, they are meant to be a single BC (as in: business subsystem), but CQS splits the subsystem into 2 "BC"s: Command BC and Query...
Hendry Luk
hendrypa
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Jul 6, 2009
11:53 pm
13686
Does anyone have any thoughts on this issue of whether CQS and Event Sourcing can only be achieved in certain environments? Or more specifically, what...
Michael Hart
michaelhartau
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Jul 7, 2009
6:58 am
13687
Hi Greg Apparently the difference between SWIFT and BIC is that a SWIFT code is assigned by the banking institute in question, and later becomes a BIC code...
Peter Morris
mrpmorris
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Jul 7, 2009
8:18 am
13688
... Sourcing can only be achieved in certain environments? ... isn't available? According to Greg's latest InfoQ presentation "Unshackle Your Domain", he...
jonathan_s_oliver
jonathan_s_o...
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Jul 7, 2009
11:45 am
13689
If you're simply trying to perform a transaction across multiple aggregate roots but you're still in the same bounded context, you could obtain a simple lock...
jonathan_s_oliver
jonathan_s_o...
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Jul 7, 2009
11:52 am
13690
Hi all, I'm trying to work out which of my two entities should be an aggregate root, I have a User who can create many Campaign. If the User has the...
Ben Ellis
dw_zaith
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Jul 7, 2009
12:15 pm
13691
Hi Jonathan, ... Right, so this is a pessimistic strategy. How's this going for you in a distributed system? Does it scale? ... Well I don't agree with this -...
Michael Hart
michaelhartau
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Jul 7, 2009
12:17 pm
13692
In his presentation 'Unshakle your domain', Greg explains that the Aggregate Roots consumes Commands and publish Events indicating the state change. The Events...
jeremie.chassaing
jeremie.chas...
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Jul 7, 2009
12:47 pm
13693
"Without some sort of additional framework to add transactions across aggregate roots the commit/aggregate root makes them a consistency boundary for...
jps737
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Jul 7, 2009
3:42 pm
13694
... I think you should not, but you can use sagas.. Kind of transactions except that you apply compensating action if something fail instead of rollbacking....
jeremie.chassaing
jeremie.chas...
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Jul 7, 2009
3:57 pm
13695
Sorry for late reply, however it doesn't look like have much duplication.... it only the name of the methods are same, but look like it actually doing ...
Carfield Yim
c8133594
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Jul 7, 2009
4:26 pm
13696
One of the main reasons you probably want to look at this is that often times the failure (and compensation of) an action itself has domain significance. The...
Greg Young
gumboismadeo...
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Jul 7, 2009
4:49 pm
13697
Thanks Greg and Jeremie. Greg I definitely see that the action and corresponding action have significance in the domain. I've considered sagas as implemented...
jps737
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Jul 7, 2009
5:08 pm
13698
... Of course there is some reading going on while processing a command on the C side by your "normal" orm means. However that is not carried out by the Q side...
Sebastian Jancke
sebastian.ja...
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Jul 7, 2009
6:19 pm
13699
... My friend Björn has some drawings and an introduction to CQS made during a discussion with Greg (at QCon I think): ...
Sebastian Jancke
sebastian.ja...
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Jul 7, 2009
6:21 pm
13700
I have been studying this group and various other resources on the matter of Bounded Context and have a few questions that I am fuzzy on. I have a new area of...
nichols_mike_s
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Jul 7, 2009
8:36 pm
13701
So let's say an organization offering access to cloud (web) services in the same vein that Amazon does wants to employ CQS. The implementation of a given...
Matt Burton
matt.burton
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Jul 7, 2009
8:52 pm
13702
... It actually can scale because it's not truly "pessimistic" in the classic RDBMS sense. I'll explain a little more below. ... From what I understand and...
jonathan_s_oliver
jonathan_s_o...
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Jul 8, 2009
3:52 am
13703
Hi Jonathon, ... Hmmm, well we're going to have to agree to disagree on this one then. I'm talking about a concept like this: ...
Michael Hart
michaelhartau
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Jul 8, 2009
5:19 am
13704
Personally my biggest obstacle in learning CQS is that, i have seen lots of beautiful texts and drawings about it, but i haven't found any code. When I...
Hendry Luk
hendrypa
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Jul 8, 2009
6:31 am
13705
Yes, Sagas are part of the domain. It's a kind of 'domain transation', in the same way you would do when you come at the supermarket checkout : either you pay...
jeremie.chassaing
jeremie.chas...
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Jul 8, 2009
8:02 am
13706
... That's actually the post I was referring to (although I should have linked to it). The idea is that when the client builds a command, he's doing so using...
jonathan_s_oliver
jonathan_s_o...
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Jul 8, 2009
1:30 pm
13707
Hi Jonathan, ... That's not what I get out of the thread - it's not about issues with the eventually consistent model, it's about resolving conflicts with ...
Michael Hart
michaelhartau
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Jul 8, 2009
2:00 pm
13708
That's a good example Jeremie, thanks. What I meant to say is that the way sagas are usually implemented using ESBs feels like a lot of infrastructure is...
jps737
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3:02 pm
13709
Probably because the Saga lifetime is very transiant and doesn't reference to a 'real world' entity... And an entity consumes Commands and publishes Events, a...
jeremie.chassaing
jeremie.chas...
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4:09 pm
13710
I say probably because that's my current understanding of sagas, I haven't used sagas for now in my system....
jeremie.chassaing
jeremie.chas...
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4:13 pm
13711
I haven't used them either but now I have a situation that requires them. So it sounds like a saga is a stateful domain message handler used to coordinate...
jps737
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4:58 pm
Messages 13682 - 13711 of 13711   Oldest  |  < Older  |  Newer >  |  Newest
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