kotlinx-kover VS Micronaut

The tool to measure code coverage in Java is JaCoCo, but that is not the only one. There are existing things like OpenClover or in Kotlin things like Kover and so on (just to mention some).

Kover is still lacking basic Android support and in our Android projects we were not able to replace Jacoco yet (due to errors): https://github.com/Kotlin/kotlinx-kover/issues/18

Kover 0.6.1 now supports this: https://github.com/Kotlin/kotlinx-kover/issues/121

- Language: Java 17 or Kotlin

- API Layer: For tiny projects, Vert.x API directly, for larger projects Quarkus

- DB: Postgres, in-memory H2 for simple stuff

- Testing: JUnit 5, Testcontainers to automatically start + stop DB Docker containers with tests, Mockito or Mockk (Kotlin) for mocks

- Dependency Injection: CDI (built into Quarkus, for Vert.x you can initalize Weld when the app starts)

- Build tool: Gradle with Kotlin DSL

- Other tools:

  Kover: automatic code-coverage reports from JaCoCo/IntelliJ (https://github.com/Kotlin/kotlinx-kover)

Micronaut has a share of the space too.

https://micronaut.io/

However, you’re right that Spring Boot has the lions share of the Java ecosystem.

I've used vert.x in a big project once. I don't ever want to do that again. Performance is pretty good, but the developer experience is beyond clunky.

My current favourite Java server framework is Micronaut.

Great performance and easy to develop for!

https://micronaut.io/

I wonder how much you'd save with Micronaut: https://micronaut.io/

> Micronaut is a software framework for the Java virtual machine platform. It is designed to avoid reflection, thus reducing memory consumption and improving start times. Features which would typically be implemented at run-time are instead pre-computed at compile time.

https://en.wikipedia.org/wiki/Micronaut_(framework)

I don't think you'd go down to 9, but something like 20-30 could be doable.

I'd like to introduce my project. It is called mlfx. It can compile FXML ahead of time. It is basically an annotation processor, which internally uses Micronaut framework's AST abstraction and compiles fxml files directly to JVM bytecode. This decreases UI load time and also helps with native-image reflection configs. It also has some compliance tests that load compiled code and check resulting object graph against one loaded by javafx-xml. It also has some drawbacks now, but, please, read README. Now I'm successfully using it in two production projects.

https://micronaut.io/ https://quarkus.io/

when it comes to full stack frameworks, Micronaut(https://micronaut.io/) is actually good and pleasant to work with.

For the server Quarkus and Micronaut might be interesting besides Spring Boot. Quarkus is more popular and backed by RedHat (so probably here to stay).

🥇 Spring Boot 🥈 Quarkus 🥉 Micronaut 🏅 Ktor 🏅 http4k

Spring boot is still The King. Although I've not done more than hello world with Micronaut, it might have easier learning curve than Spring (and concepts are similar to Spring so you can carry over later to learn Spring). It could also be a useful skill in world of microservices these days.