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TARAS BOYCHUK
REACTIVE
Agenda
• what I’m working on now 👨💻
• problems with Hibernate ORM ☹
• solutions using reactive programming 🧐

• live coding with Hibernate Reactive 💻
REACTIVE
3
🙋
Taras Boychuk
👨💻
👨🏫
REACTIVE
Open Source Education for Java Developers
4
REACTIVE
5
Persistence
Context
Lazy Loading
Dirty Checking
Cascade
Operations
Orphan
Removal
Action Queue
Flush
REACTIVE
6
https://peoplepill.com/people/martin-fowler
OrmHate?
REACTIVE
7
https://martinfowler.com/bliki/OrmHate.html
OrmHate. Martin Fowler

REACTIVE
8
REACTIVE
IN REAL APPS
Server
JVM
Tomcat
9
Controllers
Service
…
Spring Data JPA
Hibernate ORM
JDBC Driver
REACTIVE
HikariCP
…
Blocking I/O
…
https://www.reactivemanifesto.org/
10
REACTIVE
11
Reactor Netty Eclipse Vert.x
* based on Asynchronous Sockets
REACTIVE
No ORM
12
THE FIRST REACTIVE ORM? 🤔
REACTIVE
13
REACTIVE
Reactive Postgres Client
Non-Blocking


I/O
REACTIVE
Before you start ❗
• Understand the idea of reactive programming ✅

• Understand functional programming features ✅

• Understand CompletableFuture ✅
REACTIVE
15
Live Coding Session 👨💻
REACTIVE
16
https://peoplepill.com/people/martin-fowler
ReactiveOrm..?
REACTIVE
Summary
• The
fi
rst “reactive” ORM 👏

• It’s only Beta4 ⚠

• Hibernate complexity + reactive programming complexity 🤯
• Built on top of Vert.x Reactive Client ✔

• Already supported by Quarkus ✔

• Not supported by Spring Data ⛔
REACTIVE
18
See you

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