nchen/learn-java

Spring Boot demo application

Built by following official guide here: https://spring.io/guides/gs/rest-service/

Bootstrapped with Initializr.

Select OpenJDK 17.

Dependencies:

• Spring Web

How to run the application

./gradlew bootRun

To verify:

curl http://localhost:8080/greeting

ab -c 50 -n 5000 http://localhost:8080/greeting

k6 run ./api-test.js

Other tutorials to explore

https://spring.io/projects/spring-boot/#learn

https://spring.io/guides/topicals/spring-boot-docker/

TODO

• Containerize.
• Load test (probably with K6 or ab).
• Setup prometheus client (or other metrics client) + Grafana.
• Observe some key metrics of a Java application, like GC, latency, number of connections etc.