[dev2next] - Quarkus for Spring Developers

In this session, I will show concepts and conventions familiar to Spring developers and how those same concepts and conventions can be implemented in Quarkus, all while highlighting similarities and differences between them. Additionally, I will show similarities and differences in how testing is done, highlighting Quarkus Dev Services.

This session will be mostly live coding while minimizing the amount of slides. I will introduce an existing Spring application with a full test suite and build a Quarkus equivalent version of it, live, while showcasing similarities and differences between the two frameworks.

1. @edeandrea for Developers Eric Deandrea Sr. Principal Software Engineer IBM
2. @edeandrea Who’s on Stage Today? Eric Deandrea 🤘 26+ years software development experience 🤘 Java Champion 🤘 Contributor to Open Source projects • Quarkus • LangChain4j (& Quarkus LangChain4j) • Spring Boot, Spring Framework, Spring Security • Wiremock • Microcks 🤘 Boston Java Users ACM Chapter Vice Chair 🤘 Published author
3. @edeandrea • How Quarkus enables modern Java development & the Kubernetes-native experience • Introduce familiar Spring concepts, constructs, & conventions and how they map to Quarkus • Emphasis on testing patterns & practices https://red.ht/quarkus-spring-devs
4. @edeandrea https://youtu.be/spJwsa4KFrU RIP Java
5. @edeandrea Java,The Enterprise Workhorse
6. @edeandrea Monolith J2SE / J2EE Java / Jakarta EE Java,The Enterprise Workhorse
7. @edeandrea Cloud-Native Microservices Spring Boot MicroProfile Java,The Enterprise Workhorse J2SE / J2EE Java / Jakarta EE Monolith
8. @edeandrea Java,The Enterprise Workhorse J2SE / J2EE Java / Jakarta EE Spring Boot MicroProfile Monolith Cloud-Native Microservices
9. @edeandrea
10. @edeandrea The Warmup Issue with Java https://youtu.be/bWmuqh6wHgE (Simon Ritter - Azul Systems)
11. @edeandrea The Quarkus Difference
12. @edeandrea Build Time Runtime Packaging (maven, etc) gradle…) Load config file from file system Parse it Classpath scanning to find annotated classes Attempt to load class to enable/disable features Build its model of the world. Start the management (thread, pool…) @ @ </> How Does a Framework Start?
13. @edeandrea The Quarkus Way Runtime Build Time @ @ </> Package model
14. @edeandrea JVM Build Time @ @ </> Package model Native The Quarkus Way enables Native Compilation
15. @edeandrea Unification of Imperative & Reactive Unification of Imperative and Reactive
16. @edeandrea 🤘Zero-config Live coding 🤘Auto-provision services 🤘Continuous testing 🤘Dev UI 🤘CLI Enhancing Developer Joy
17. @edeandrea IT’S STILL JAVA!
18. @edeandrea Is it a Jedi Mind Trick?
19. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic Holly Cummins - https://youtu.be/vnrXXvnqriA
20. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining Holly Cummins - https://youtu.be/vnrXXvnqriA
21. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining 🤘Extensible build process so libraries can participate 🤘Jandex Indexing (offline reflection) Holly Cummins - https://youtu.be/vnrXXvnqriA
22. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining 🤘Extensible build process so libraries can participate 🤘Jandex Indexing (offline reflection) 🤘Don’t make humans tell the computer what it knows Holly Cummins - https://youtu.be/vnrXXvnqriA
23. @edeandrea What’s the Secret Sauce? 🤘Don’t be dynamic 🤘Dead code elimination / inlining 🤘Extensible build process so libraries can participate 🤘Jandex Indexing (offline reflection) 🤘Don’t make humans tell the computer what it knows 🤘Continuous profiling & shaving 🤘Be reactive without forcing humans to do reactive Holly Cummins - https://youtu.be/vnrXXvnqriA
24. @edeandrea
25. @edeandrea Jam Time! https://github.com/quarkusio/spring-quarkus-perf-comparison
26. @edeandrea JVM Native Quarkus Spring Boot Ratio (Quarkus / SB) Spring Boot (w/AOT) Ratio (Quarkus / SB AOT) Quarkus Spring Boot Ratio (Quarkus / SB) Framework version 3.26.4 3.5.6 3.5.6 3.26.4 3.5.6 Build time (s) 8.87 5.29 167.63% 11.26 78.83% 136.04 211.78 64.25% Av. RSS after startup (MB) 195.97 270.92 72.33% 264.69 74.04% 73.23 163.05 44.91% Av. time to 1st req (ms) 3,240.67 5,559 58.3% 4,980 65.07% 216 243.67 88.65% Av. RSS after 1st req (MB) 255.34 312.32 81.75% 306.5 83.31% 82.09 165.29 49.66% Av. throughput (req/sec) 33,396.37 7,879.33 423.85% 7,931.99 421.03% 18,745.73 6,923.16 270.77% Max throughput density (req/sec/MB) 53.99 12.58 429.12% 13.63 396.02% 71.83 18.16 395.51% Build RSS (GB) 5.46 8.12 67.24% Binary Size (MB) 95.55 158.26 60.38% Don’t Take My Word For It! Some real numbers (8 cores, 14GB RAM, GraalVM CE 21.0.2)
27. @edeandrea 🤘 Spring Boot 3 application contents: ◦ 39,971 classes ◦ 85,594 fields ◦ 284,561 methods ◦ Reflection: ◦ 11,211 classes ◦ 2,132 fields ◦ 13,154 methods 🤘 Quarkus 3 application contents: ◦ 25,454 classes ◦ 49,205 fields ◦ 201,210 methods ◦ Reflection: ◦ 7,353 classes ◦ 359 fields ◦ 6,338 methods 🤘 The Quarkus application has: ◦ 14,517 (36%) less classes ◦ 36,389 (42%) less fields ◦ 83,351 (29%) less methods ◦ 3,858 (34%) less classes using reflection ◦ 1,773 (83%) less fields using reflection ◦ 6,816 (52%) less methods using reflection A Real Example
28. @edeandrea Success Stories
29. @edeandrea Don’t Take Our Word For It! https://www.redhat.com/en/resources/etat-du-valais-customer-case-study
30. @edeandrea https://quarkus.io/blog/orange-telco-core-network-api-management-with-quarkus
31. @edeandrea https://www.youtube.com/live/YNxz3KaTz5Y
32. @edeandrea https://quarkus.io/blog/tag/user-story Don’t Take Our Word For It!
33. @edeandrea https://quarkus.io/blog/tag/user-story Don’t Take Our Word For It!
34. @edeandrea Additional Resources
35. @edeandrea But I Already Know Spring… 🤘Can I do reactive/imperative/blocking? 🤘What if there isn’t an extension for my library? 🤘Can I reuse my existing Spring code? 🤘GraalVM native compilation takes time & memory… 🤘What if I have my own framework on “top”? 🤘How do I migrate?
36. @edeandrea https://www.redhat.com/en/resources/greener-java-applications-detail Setup 🤘 AWS (us-east-1) 🤘 SLA > 99% 🤘 800 req/sec over 20 days 🤘 50% load The Cost / Carbon Impact
37. @edeandrea https://github.com/quarkusio/quarkus-super-heroes https://quarkus.io/quarkus-workshops/super-heroes Quarkus Superheroes
38. @edeandrea Open Source Open Foundation Open Governance
39. @edeandrea
40. @edeandrea Thank You!