Greg Young - A Decade of DDD, CQRS, Event Sourcing

Domain-Driven Design Europe 2016 - Brussels, January 26-29, 2016
dddeurope.com - / ddd_eu
Organised by Aardling (aardling.eu/)
Gregory Young coined the term “CQRS” (Command Query Responsibility Segregation) and it was instantly picked up by the community who have elaborated upon it ever since. Greg is an independent consultant and serial entrepreneur. He has 15+ years of varied experience in computer science from embedded operating systems to business systems and he brings a pragmatic and often times unusual viewpoint to discussions. He’s a frequent contributor to InfoQ, speaker/trainer at Skills Matter and also a well-known speaker at international conferences. Greg also writes about CQRS, DDD and other hot topics on codebetter.com.

[@tamrix]

I'm from the future the year 2031 in a n-temporal timeline. Greg Young releases his book, finally! We now all use quantum event events, which never happened but always have happened.

[@jp201031]

The link to this video is given internally in our organisation on the confluence pages for training purposes and its truly a good one. Thanks Greg!

And now you need to understand all of the previous requirements of the system in order to implement the next requirement, because you must have it work with all the events that were produced by older versions of the system.

This talk clarifies so many things!

[@needmachine]

*stuff

[@СвятославМихайлів]

wow, ben affleck is talking about cqrs

[@MykolaKlymyuk]

33:25 You can sum up the next 5 minutes as "you can't have unique usernames, this is a fundamental constraint of eventually consistent systems, but I won't tell you this; what I'm saying is that your business requirements suck".

[@einfacherkerl3279]

29:10 🤔 ATM chasing person "give my money back" 🏃 🏧

[@flashflexpro]

Probably the best enterprise software architecture talk so far.

[@geekboy328]

Refreshing and clarifying

[@Gentlehag]

Awesome talk and clearing up a lot of those dogma things i felt uncomfortable with

[@crowdozer]

"After Sumeria, some things happened, and then we came to 2006." Well, you're not wrong...

[@FrenchPirate83]

0:50 "One thing I can promise is we will not have these slides..." { shows the slides in question } :p

[@someguyO2W]

This video finally tipped me towards ES systems. I've always wanted to use it, but assumed it was a top-level architecture, and it really was too much work for me then.

[@geekboy328]

some guy on the web haha, I feel the same way! Except now I know not to try and force a top level architecture using ES

[@cafeliu5401]

Very practical points

[@cloudysky82]

I prefer functional programming over OO.. but I disagree that this can't be done in OO.. even if event sourcing is function oriented.

[@thedivisionvampire9701]

Very good story telling

[@kaczaczacza]

that was a very good talk

[@EugeneKarasev]

Funny, but almost useless if you are looking for architectural insight

[@default632]

where should I go if I am looking for architectural insight?

[@rubenlara3386]

Seine Stimme ist sehr unangenehmen und hört sich sehr aggressiv an. Ich meine, ich genieße Chris Richardson bei seinen Vorträgen weil er ruhig spricht. Schade, ich hatte mich gefreut.