This presentation is from my Meetup talks about how we were building Serverless Application using Java and Step Functions. It contains some comparison of 3 different approaches on how you can build Java with Serverless : AWS SDK, Micronaut and Spring.

1. How we were building microservices with
AWS Step functions, Java and Micronaut

2. Andrew Zakordonets
• Software Engineer in Test
• 10+ years in Software Testing and
Automation
• Working on building tools and test
automation
Contact:
http://biercoff.com

3. What are we gonna talk about

4. What we wanted to build

5. Why serverless java

6. Why serverless java

7. Why serverless java

8. Challenges while building java serverless
Slow cold start

9. Challenges while building java serverless
Slow cold start
Package size

10. Java 11 and Jlink

11. AWS Reality

12. Custom runtime
Maybe solution : ghadishayban/lambdaclj-jdk11
Partial solution : andthearchitect/aws-lambda-java-runtime

14. What is cool about Micronaut ?

15. What is cool about Micronaut ?

16. What is cool about Micronaut ?

17. What is cool about Micronaut ?

18. What is cool about Micronaut ?

19. What is cool about Micronaut ?
Micronaut

20. Java Lambda 101

21. Java Lambda 101

22. Java Lambda with Micronaut

23. Java Lambda with AWS SDK

24. ApiGateway Integration

25. Authorizers

26. Authorizers

27. Layers

28. Layers

29. Micronaut vs Spring
Topic Micronaut Spring AWS SDK
Package size 9.56 Mb 12.33 Mb 691 Kb
Cold start 4,91s 11,23s 0,85s
Average Response
Time
(20 single thread
calls)
205,48ms 201,31ms 62,9ms

30. Small performance test
Measurement AWS SDK Micronaut Spring
data received 6.4 MB 644 kB/s 3.6 MB 357 kB/s 168 kB 17 kB/s
data sent 658 kB 66 kB/s 376 kB 38 kB/s 16 kB 1.6 kB/s
http req blocked 9.31ms 16.4ms 120.07ms
http req connecting 1.79ms 2.38ms 19.87ms
http req duration 60.19ms 118.43ms 73.67ms
http req receiving 85.44µs 41.46µs 47.94µs
http req sending 89.17µs 53.63µs 84.88µs
http req tls handshaking 7.17ms 13.98ms 96.91ms
http req waiting 60.02ms 118.34ms 73.54ms
http reqs 13965 1396.377928/s 7370 736.981504/s 149 14.899509/s
iteration duration 71.37ms 135.25ms 194.13ms
vus 100 min=100 max=100 100 min=100 max=100 100 min=100 max=100
k6 runs 100 concurrent users for 10 seconds

31. Performance test
k6 runs 100 concurrent users for 2.30 minutes
No Timeout Cold start No Timeout Warm Run
Measurement AWS SDK Micronaut Spring AWS SDK Micronaut Spring
data_received
56 MB 373
kB/s
58 MB 386 kB/s 56 MB 373 kB/s 61 MB 406 kB/s 60 MB 398 kB/s 59 MB 393 kB/s
data_sent
5.7 MB 38
kB/s
5.9 MB 39 kB/s 5.2 MB 35 kB/s 6.2 MB 41 kB/s 6.1 MB 41 kB/s 5.5 MB 36 kB/s
http_req_blocked 998.18µs 1.89ms 1.2ms 1.25ms 1.3ms 2.01ms
http_req_connecting 156.39µs 292.78µs 185.74µs 227.21µs 145.46µs 328.02µs
http_req_duration 106.01ms 106.36ms 118.46ms 101.73ms 102.05ms 107.97ms
http_req_receiving 103.07µs 81.64µs 136.71µs 76.65µs 91.26µs 102.68µs
http_req_sending 84.93µs 89.55µs 122.73µs 83.88µs 92.81µs 83.55µs
http_req_tls_handsha
king
769.24µs 1.45ms 917.39µs 1ms 986.36µs 1.66ms
http_req_waiting 105.82ms 106.19ms 118.2ms 101.57ms 101.87ms 107.79ms
http_reqs
130813
872.08/s
135511 903.40/s 119581 797.20/s 142498 949.98/s 140119 934.12/s 126040 840.26/s
iteration_duration 114.31ms 110.31ms 124.99ms 105.12ms 106.81ms 118.88ms
iterations
130813
872.08/s
135511 903.40/s 119581 797.20/s 142481 949.87/s 140091 933.93/s 126020 840.13/s

32. Performance test
k6 runs 100 concurrent users for 2.30 minutes
500 ms Timeout Cold start 500 ms Timeout Warm Run
Measurement AWS SDK Micronaut Spring AWS SDK Micronaut Spring
data_received 12 MB 78 kB/s 11 MB 76 kB/s 12 MB 79 kB/s 12 MB 79 kB/s 12 MB 79 kB/s 13 MB 86 kB/s
data_sent 1.2 MB 8.0 kB/s 1.2 MB 7.7 kB/s 1.1 MB 7.4 kB/s 1.2 MB 8.0 kB/ 1.2 MB 8.1 kB/s 1.2 MB 8.0 kB/s
http_req_blocke
d
1.02ms 1.19ms 1.07ms 1.63ms 1.38ms 1.28ms
http_req_connec
ting
70.17µs 49.15µs 58.27µs 100.41µs 54.86µs 68.96µs
http_req_duratio
n
547.1ms 561.11ms 593.57ms 544.9ms 548.18ms 573.55ms
http_req_receivi
ng
77.61µs 84.97µs 78.36µs 42.36µs 50.84µs 43.94µs
http_req_sendin
g
69.96µs 73.21µs 70.8µs 65.84µs 69.45µs 69.34µs
http_req_tls_han
dshaking
944.25µs 994.74µs 1ms 1.39ms 1.22ms 1.06ms
http_req_waiting 546.95ms 560.96ms 593.42ms 544.79ms 548.06ms 573.44ms
http_reqs 27260 181.73/s 26589 177.25/s 25110 167.39/s 27367 182.44/s 27218 181.45/s 26029 173.52/s
iteration_duratio
n
549.33ms 563.05ms 596.04ms 547.07ms 550.07ms 575.29ms
iterations 27260 181.73/s 26589 177.25/s 25110 167.39/s 27367 182.44/s 27218 181.45/s 26029 173.52/s
vus 100 100 100 100 100 100

33. Performance test summary
0 20000 40000 60000 80000 100000 120000 140000 160000
AWS SDK no timeout
Micronaut no timeout
Spring no timeout
Micronaut timeout
Spring timeout
AWS SDK timeout
Warm Cold

34. Logging
Log4j -> tiny log

35. GraalVM

36. Conclusions

37. The end

38. Q&A