Before we begin . . .
Take a post-it and write down the main value you'd like to get out of event storming...
then put it on the glass wall!
Event Storming Workshop: Building Noteworthy
Event Storming Workshop: Building Noteworthy
@ie_ddd
@barryosull
@daraghoshea
https://www.dddireland.org
https://barryosull.com
https://www.daraghoshea.com
Using Event Storming to spec out a real product
The Workshop:
- The Noteworthy concept
- Event Storming Refresher
- Event Storming Session
- How it actually turned out
- Networking
Workshop Structure
(Barry will play the role of business owner)
Crowd Sourced/Crowd Funded Journalism
- New product that the journal.ie wants to make
- People suggest stories
- Stories get put out for funding
- Funded stories become published articles
Event Storming Refresher
Types of Post-its
1. Domain Events
5. Commands
2. Business process
(constraints)
3. Issues
4. External System
6. View
Temporal Modelling
Payment
Failed
Payment
Succeeded
Order
Dispatched
Shipping Details Entered
Discount
Applied
Tips & Tricks
- Don't be afraid to remove post-its
- Move it all around if you have to
- Break the model!
- Map the same process different ways, then generalise
- Highlight risks, assumptions and costs
- Annotate your post-its
- Draw connections between events and business rules
Lets get Modelling!
The Final Product
How we built it
Auth
Story Submission
Proposal Publishing
Crowd Funding
Story Publishing
Generic
Firebase Auth
Assumptive
Typeform + Trello
Core
Web App
Generic*
GoFundMe
Core
Existing System
Next meetup
Lightning Talks: Real world DDD Experiences
Modelling Constraints: Defining our systems
or
Which do you prefer?