Louisville Java Users' Group January 2021

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Jeremy Davis
Chief Architect
@argntprgrmr

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What exactly?

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Event Driven Architecture

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Producers and Consumers

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And Back

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It’s really fast, productive,
and fun to use.

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Apache Kafka® is a
distributed streaming
platform.

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AMQ Streams
We rename everything

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Why Kafka (AMQ Streams)?

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Why Kafka (AMQ Streams)?

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Find a balance between
quantity and relevance

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Why Kubernetes (OpenShift)?
Makes Microservices Easy Easier
Operators Make Kafka Easy Easier

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AMQ Streams on OpenShift
AMQ Streams (Kafka) and OpenShift (Kubernetes)

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Building Event Driven
Architectures

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▸ https://www.eventstorming.com
▸ https://www.eventstorming.com/book/
Domain Driven Design

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We aren’t going to cover
all of this stuff

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It is common for these to
bleed together and cause
problems

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Also useful for
microservices within a
single system

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Enables Collaboration
● Agreed upon by
domain experts and
dev team
● Constantly revisited
and kept current
● Starts with the
Domain Model

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Let’s look at some code

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Event Storming
▸ https://www.eventstorming.com
▸ https://www.eventstorming.com/book/
▸ https://openpracticelibrary.com/practice/event-storming

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User
View
Aggregate
Command
Business Process
External System
Colors are a convention
and have meaning

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Order Placed
Order Packed
Order Shipped
Order Received

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Event Storm

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Coffeeshop Event Storm

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linkedin.com/company/red-hat
youtube.com/user/RedHatVideos
facebook.com/redhatinc
twitter.com/RedHat
Red Hat is the world’s leading provider of enterprise
open source software solutions. Award-winning
support, training, and consulting services make
Red Hat a trusted adviser to the Fortune 500.
Thank you

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https://github.com/quarkuscoffeeshop
Jeremy Davis
Chief Architect
@argntprgrmr

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Event Driven Architecture
https://www.redhat.com/en/topics/integration/what-is-event-driven-architecture
https://microservices.io/patterns/data/event-driven-architecture.html
Domain Driven Design
https://www.youtube.com/watch?v=dnUFEg68ESM
https://www.youtube.com/channel/UC3PGn-hQdbtRiqxZK9XBGqQ
Event Storming
https://www.eventstorming.com/
https://www.youtube.com/watch?v=mLXQIYEwK24