Domain-Driven Design in 150 Seconds

In today's video, we'll cover the most important concepts of Domain-Driven Design in an impossible timeframe of 150 seconds!
What's on the agenda?
What is DDD
Strategic design
Subdomains
Context Map
Bounded Context
Ubiquitous Language
Tactical Design
Entities vs. Value Objects
Aggregates
Aggregate Root
Invariants
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#ddd #domaindrivendesign #dotnet

[@MilanJovanovicTech]

I asked myself: Can he deliver on DDD in 150s? Yes, yes he can! Great job 😁

[@amantinband]

Thanks man 🫶🏼

[@lukagolubovic3641]

Nisam jedini Srbin koji voli DDD!

[@wennwenn1422]

Sorry, I disagree. What's the purpose of these videos if you already know DDD or does very little to educate audience? Just throwing around concepts and covering it under 150s does not make it a big deal.

[@АлексейсПирмайс]

did he?

[@temelreis381]

I love these shorter explanations of complex subjects! Any fool can go on and on about a subject for hours, but it takes real skill to summarize it!

[@thishandleistaken]

I think something is wrong with your microphone! Nice vid otherwise!

[@amantinband]

Yeah, I noticed yesterday the gain was way up 😣 the sounds will be significantly better the video after the next one 🤞

[@Brianle180]

I actually thought it was my IPad speaker problem.

[@jonathanniels]

Such a cool microphone setup, yet very poor voice sound quality

[@simonsteinkruger5196]

Great video to recap all the things learned if you have already a ddd theory background. For absolute beginners it's probably overwhelming. But anyway great content, very precise!

[@esteban-alvino]

I'm starting with DD I wrote some java services. I'm encouraged to learn methodologies to improve my code. Thanks for your effort doing video like this one.

[@GughaGSrinivasan]

Just like Fireship channel... crisp and on point... Thats all I needed to know... I have both the books about DDD, but never finished it.... even though I am a JAVA developer, I have subscribed for your content... :) keep it coming.

[@amantinband]

Thanks Gugha!

[@rajughorai7483]

🎯 Key Takeaways for quick navigation: 00:00 🌐 *Domain-Driven Design is a debated software development approach, loved by some and hated by others.* 00:28 🌐 *In Domain-Driven Design (DDD), strategic design begins with exploring the problem space, identifying subdomains like listings, reviews, and invoices.* 01:11 📚 *Bounded Contexts in DDD are logical boundaries with consistent language, fostering a ubiquitous language shared between developers and business experts.* 01:37 🧩 *Tactical design in DDD focuses on implementation details, distinguishing between entities (mutable with an ID) and value objects (immutable without an ID).* 02:20 🏠 *In DDD, aggregates consist of entities and value objects, with an aggregate root responsible for enforcing invariance and serving as a transactional boundary.*

[@sushilb7994]

Awesome video, Amichai! Very excited to the DDD series✌️

[@amantinband]

We’re starting a deep dive this Wednesday 🤙🏼

[@carmineos]

Great and clear explanation, can't wait to continue following your Clean Architecture & DDD videos

[@amantinband]

We’re coming back full force starting this Wednesday!

[@carmineos]

@@amantinband 🔥

[@martamasson8941]

Aaaaaaaaawesome!! 👏👏👏👏👏👏👏👏👏 Big fan of you!!! Going immediately to the next video to go deeper

[@pacoblomkvist_]

And that's why universities should consider hiring people whith extensive business experience rather than IT philosophers. Great explanation even for 150s!!!!!

[@amantinband]

Haha universities can’t afford people with extensive business experience

[@daviddawkins]

That was great, I look forward to more on this subject. (sound was distorted for me though...)

[@winstonstrongarm8929]

Great video, you summarized it well. My ADHD thanks you

[@amantinband]

Haha tell me about it 😅

[@botelhorui]

Good introduction! We should learn like Google-Maps: DDD zoomed-out = 150 seconds, zoom-in DDD 30 minutes, zoom-in into each DDD-area 60 minutes. Thank you!

[@gustavoadolfohernandezcabr6934]

Great. Waiting for the DDD series!!!😀

[@amantinband]

Thanks Gustavo 🫶🏼

[@mamadeebuildsahouse]

I want to learn architecture but there are so many ways. I wish we remained on the MVC pattern of design and then solve a business problem that way. I'm currently designing an imaging system and looking for ways to make it scalable and reusable.

[@jimmevandermeer6511]

thank you so much dude, cba with a 500 paged book

[@adambickford8720]

Its like OOP, only even more vague and expensive to change

[@Tamer_Ali]

Hi Amichai, I hope you talk about Hash Table and its benefits over other collections like arrays with example

[@amantinband]

Sure, that’s a fun topic. Perhaps I’ll deliver it with solving an interview question

[@Tamer_Ali]

@@amantinband cannot wait 👍

[@purtelo]

Good one! But... what is the purpose of that big microphone in front of you? :D

[@ak-ot2wn]

I can't believe how much this video helped me compared to all the theory :D

[@rohitshirgaonkar1982]

Would like more of these trailers. ❤ Keep learning 😊

[@amantinband]

Thanks, Rohit! I think a good way to learn large topics is getting a sneak peek of the big picture and then breaking it down piece be piece. So you can expect more similar videos in the future 🙂

[@Noceo]

I don’t know if you take requests, but I would love to see your approach on unit testing. Especially in combinations with things like middleware or MediatR behaviors, which makes it tricky to test validation logic (I know you can test the validator itself, but maybe you have a more holistic approach).

[@amantinband]

I have a lot of opinions when it comes to testing 😅 I’ll be covering unit/integration testing in depth in future videos 👍🏼

[@adisilagy]

Great video @Amichai You're very good with explaining complex topics especially due to the examples that we can all relate to. I was wondering do you have a rule of thumb to identify context boundaries? Let's assume we develop a quiz system. Sure the quiz is an aggregate root responsible for the questions and their options. But what about the records of the learners? I assume it controlled by another aggregate root like LearnerQuiz.... WDYT?

[@amantinband]

When you say “context boundaries”, are you referring to different bounded contexts or different aggregates?

[@adisilagy]

@@amantinband I was referring to different bounded context...

[@amantinband]

For simple scenarios like the quiz example, It’s probably a single bounded context. Ideally each subdomain is mapped to a single bounded context. Identifying subdomains depends on the domain, but a good indicator is looking at the different teams that will be working in the domain. Will they be working in the same application/system? Will it be a single unit of deployment? If the teams are working on different applications/systems/microservices then it can make sense to draw a boundary and have an ACL in the downstream subdomain. Since bounded contexts are logical boundaries, separate systems/separate teams doesn’t necessarily mean separate bounded contexts. What’s important is that the relevant people are aligned within a bounded context, and that the relationship between the subdomains is clear. Does that make sense?

[@adisilagy]

@@amantinband Yes it makes a perfect sense! Thanks a lot

[@sprintwithcarlos]

In your example reservation entity and aggregate are the same. Is that correct?

[@cavila0217]

Thanks a bunch for this nice explanation, this is what I've waiting for!

[@alexanderm8169]

How would you add the sign in request or create user request to a SPA client or .net maui in the clean architecture (DDD). Would it be nested under the presentation layer just another class library with projectName.Api?

[@lilililliilil]

plz more more videos about DDD !!❤ tyty

[@SebastianPatten]

Great job. Nailed it

[@amantinband]

Thanks Sebastian 🫶🏼

[@anantawijaya1594]

This is great explanation in short time. thnaks

[@gui.ferreira]

Great overview 👏

[@amantinband]

Thanks, Gui ❤️

[@zakariasmahi2263]

Great explanation, thanks :)

[@amantinband]

Great to hear. How familiar are you with DDD? I’m curious how much of a cognitive load this was for new comers 👀

[@NoName-oh9fh]

То есть это работает так? ProfileService -- UserService -- UserRepository -- UserEntity ?

[@alexeym6830]

Super! Very clear!

[@FluffyPhoenix991]

Nicely wrapped up, a bit fast but well I guess that's the point of this video :P.

[@andang6613]

I watched it 10 times, so it's 1500s for me

[@pynchia4119]

good vid. Pity the audio is bad, despite the professional mic

[@aktaruzzamansuman6264]

Nice explanation in 150s.

[@tiagorodrigues6284]

I would be more than welcoming jeovas witnesses if they wanted to talk about our lord and savior DDD!

[@amantinband]

Hahah DDD is indistinguishable from a religion at this point 😂

[@Tony-bu1rj]

Great video!

[@sudhirkumar-wx8hn]

Awesome!

[@amantinband]

Thanks, Sudhir 🫶🏼

[@danil3700]

Just a comment to promote the channel

[@mysocial]

too fast to unclear. are you talking to those who knows already ?

[@jodainemoore8300]

Quick Tip listen to it in Double time(2x)

[@sgipower]

oh no that sound...

[@krccmsitp2884]

Unfortunately there are alot of misconceptions about DDD, and *those* are the source of rejection and hatred.

[@RaginiEngCSRKDF]

wow

[@lucarius4465]

Please turn the gain down on your mic. It's spiking really hard for no reason

[@MrKorbenDallas]

wtf with sound?

[@amantinband]

Yeah sorry about that, the gain was way too high. The sound should be significantly better starting next week 🤞

[@MrKorbenDallas]

@@amantinband Great, thank you

[@PapaFranciscoOk]

Impossible to watch this because of sound quality.

[@Zebsy]

Ouch my ears

[@thomaspeputofules8471]

If you adjust the way you talk it sound like clip from the 50s... Seriously something is wrong with your mic.

[@SilentTremor]

You are the nicest person ever, I would love to work with you, but I'll tell you this, DDD is bad for complex systems on the contrary of what is advertised, creates insanely coupled systems and there's to much Object Oriented Architecture, on a SOA, rich contracts are the death of the flexibility and adaptability.

[@S3Kglitches]

The sound quality is awful like my university professors

[@amantinband]

Yeah sorry about that. My gain was way too high. The video after the next one should be significantly better 🤞

[@S3Kglitches]

@@amantinband too bad this one is not reuploaded because I was really interested in the topic but cannot listen to it really

[@haslamconsultancy2152]

@@S3Kglitches add closed captions and watch muted 🤷🏼‍♂️

[@yohami]

DDD is trash