Benefits of Reactive Programming with Reactor and Spring Boot 2 - Violeta Georgieva

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Benefits of Reactive Programming with Reactor and Spring Boot 2 by Violeta Georgieva at SpringOne Tour 2019

Software

Benefits of Reactive Programming
with Reactor and Spring Boot 2
Violeta Georgieva
@violeta_g_g

Intro
• Spring Framework 5
• WebFlux
• WebFlux Fn
• Functional, reactive WebClient
• Project Reactor
• Reactor Core
• Reactor Netty
• Spring Boot 2
3

Synchronous Processing
Blocking - Remote Call
5

Synchronous Processing
Blocking - Slow Client
6

Asynchronous Processing
Blocking - Slow Client
8

Non-blocking and Event Loops
9
worker
IO
selector
Delegate
Callback

Benefits
• Connection volume scalability
• Less threads, less memory
• Ability to serve mixed traffic
12

Scenario 1 - Hello World
• WebFlux.Fn - Reactor Netty 4 threads
• MVC - Tomcat 200 threads
• MVC - Tomcat 600 threads
1500 30s 3min
14

15
WebFlux Fn - 4 Threads Web MVC - 200 Threads

16
WebFlux Fn - 4 Threads Web MVC - 200 Threads

17
WebFlux Fn - 4 Threads Web MVC - 600 Threads

18
WebFlux Fn - 4 Threads Web MVC - 600 Threads

Scenario 2 - Hello World
• WebFlux.Fn - Reactor Netty 4 threads
• MVC - Tomcat 200 threads
• Simulate slow client - 20ms delay
1500 30s 3min
19

20
WebFlux Fn - 4 Threads Web MVC - 200 Threads

21
WebFlux Fn - 4 Threads Web MVC - 200 Threads

Scenario 3 - 16k response
• WebFlux.Fn - Reactor Netty 4 threads
• MVC - Tomcat 200 threads
1500 30s 3min
22

23
WebFlux Fn - 4 Threads Web MVC - 200 Threads

24
WebFlux Fn - 4 Threads Web MVC - 200 Threads

Scenario 4 - 16k response
• WebFlux.Fn - Reactor Netty 4 threads
• MVC - Tomcat 200 threads
• Simulate slow client - 20ms delay
1500 30s 3min
25

26
WebFlux Fn - 4 Threads Web MVC - 200 Threads

27
WebFlux Fn - 4 Threads Web MVC - 200 Threads

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Benefits of Reactive Programming with Reactor and Spring Boot 2 - Violeta Georgieva

1. Benefits of Reactive Programming with Reactor and Spring Boot 2 Violeta Georgieva @violeta_g_g

2. Violeta Georgieva 2

3. Intro • Spring Framework 5 • WebFlux • WebFlux Fn • Functional, reactive WebClient • Project Reactor • Reactor Core • Reactor Netty • Spring Boot 2 3

4. Blocking vs Non-blocking

5. Synchronous Processing Blocking - Remote Call 5

6. Synchronous Processing Blocking - Slow Client 6

7. Asynchronous Processing - Blocking 7

8. Asynchronous Processing Blocking - Slow Client 8

9. Non-blocking and Event Loops 9 worker IO selector Delegate Callback

10. Use Cases

11. 11

12. Benefits • Connection volume scalability • Less threads, less memory • Ability to serve mixed traffic 12

13. Performance

14. Scenario 1 - Hello World • WebFlux.Fn - Reactor Netty 4 threads • MVC - Tomcat 200 threads • MVC - Tomcat 600 threads 1500 30s 3min 14

15. 15 WebFlux Fn - 4 Threads Web MVC - 200 Threads

16. 16 WebFlux Fn - 4 Threads Web MVC - 200 Threads

17. 17 WebFlux Fn - 4 Threads Web MVC - 600 Threads

18. 18 WebFlux Fn - 4 Threads Web MVC - 600 Threads

19. Scenario 2 - Hello World • WebFlux.Fn - Reactor Netty 4 threads • MVC - Tomcat 200 threads • Simulate slow client - 20ms delay 1500 30s 3min 19

20. 20 WebFlux Fn - 4 Threads Web MVC - 200 Threads

21. 21 WebFlux Fn - 4 Threads Web MVC - 200 Threads

22. Scenario 3 - 16k response • WebFlux.Fn - Reactor Netty 4 threads • MVC - Tomcat 200 threads 1500 30s 3min 22

23. 23 WebFlux Fn - 4 Threads Web MVC - 200 Threads

24. 24 WebFlux Fn - 4 Threads Web MVC - 200 Threads

25. Scenario 4 - 16k response • WebFlux.Fn - Reactor Netty 4 threads • MVC - Tomcat 200 threads • Simulate slow client - 20ms delay 1500 30s 3min 25

26. 26 WebFlux Fn - 4 Threads Web MVC - 200 Threads

27. 27 WebFlux Fn - 4 Threads Web MVC - 200 Threads

28. THANK YOU @violeta_g_g violetagg

Benefits of Reactive Programming with Reactor and Spring Boot 2 - Violeta Georgieva

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