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24597

Re: Exceptions in event handlers

... This might be an indication that what is actually going on is a command being sent from one to the other - ergo modeling it as an event is incorrect /
udidahan7
Apr 24
#24597
 
24596

Re: Exceptions in event handlers

" you think you have a "logic" exception, then that would mean that something about the event is "wrong", which would mean that the event didn't actually
Greg Young
Apr 23
#24596
 
24595

Re: Exceptions in event handlers

Thanks Udi for the feedback. It's an interesting view of things when you phrase it like that. In your opinion when should a compensating command be issued
songoko20000
Apr 23
#24595
 
24594

Re: Exceptions in event handlers

If it's something as simple as a deadlock or concurrency exception, you should probably retry processing the event with some exponential backoff, finally
udidahan7
Apr 22
#24594
 
24593

Re: Exceptions in event handlers

You can use process managers for this. They respond to events and issue commands to other aggregates. They may even cross boundaries ( or live in their own
Joseph Flood
Apr 21
#24593
 
24592

Re: Exceptions in event handlers

You can use process managers for this. They respond to events and issue commands to other aggregates. They may even cross boundaries ( or live in their own
Joseph Flood
Apr 21
#24592
 
24591

Exceptions in event handlers

How should one handle exceptions in events handlers when doing DDD? As a very simplistic example I want Aggregate2 to react to events raised byAggregate1.
songoko20000
Apr 20
#24591
 
24590

Re: Performance of aggregates in the database

Hi Greg, I think when you talk with an expert you talk in concepts and give name and structure to things. This can be captured pretty well in DSL model,
Rikard Pavelic
Mar 12
#24590
 
24589

Re: Performance of aggregates in the database

Reading https://docs.dsl-platform.com/ddd-real-world This seems to suggest that the model you should be talking about with the domain expert is the anemic
Greg Young
Mar 12
#24589
 
24588

Re: Same aggregate in 2 bounded contexts

Eric Evans and Vaughn Vernon explain quite well what bounded contexts should be. It would be good to have a look there, if you haven't already. Basically the
alexmad69
Mar 11
#24588
 
24587

Performance of aggregates in the database

I've managed to finish up benchmark of Revenj framework. It's available at: https://github.com/ngs-doo/dal-benchmark https://github.com/ngs-doo/dal-benchmark I
zapov
Mar 11
#24587
 
24586

Re: Suggestions for "nested" bounded contexts?

On 07.03.2015 17:56, Duncan@... [domaindrivendesign] ... A bounded context is a boundary within which a language is consistent. Nesting BCs
Thomas Presthus
Mar 10
#24586
 
24585

Re: From UI to Commands - how?

The answer is to have task-based UIs ( https://cqrs.wordpress.com/documents/task-based-ui/) On Tue, Mar 10, 2015 at 4:47 AM, chr.j.johansen@...
Avi Block
Mar 10
#24585
 
24584

From UI to Commands - how?

Hi How do you map UI Changes to commands in your DDD application ? With a typical web UI having a bunch of input fields the User needs to set, its tempting to
cjjohansen_ddd
Mar 10
#24584
 
24583

Re: Suggestions for "nested" bounded contexts?

Nothing special about these contexts. "Nested" is same as related. Go for eventual consistency and put event on to a queue to cause the other context to
Alex Paransky
Mar 8
#24583
 
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