[FIXED] Mix Lombok, Java and Scala in a maven project

Issue

I've got a mixed Scala/Java maven project where the application code, unit and integration tests are written in Java but performance tests are written in Scala.

The Scala performance tests depend on a couple Java Integration Test classes that have @Data Lombok annotations. In order for getters and setters to work I must compile JavaThenScala, which I can do through IntelliJ Scala Compiler settings.

My question is - Is there a way I can set my maven plugins to do the JavaThenScala compilation without adjusting the IntelliJ settings since I would like to deploy the code elsewhere?

I am trying to use the compileOrder configuration but it doesn't seem to do the trick for me.

My maven plugins:

  <build>
    <plugins>
      <plugin>
        <groupId>met.alchim31.maven</groupId>
        <artifactId>scala-maven-plugin</artifactId>
        <version>4.0.0</version>
        <configuration>
            <compileOrder>JavaThenScala</compileOrder>
        </configuration>
      </plugin>
      <plugin>
        <groupId>io.gatling</groupId>
        <artifactId>gatling-maven-plugin</artifactId>
        <version>3.1.1</version>
      </plugin>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

Solution

Disclaimer: Gatling founder and scala-maven-plugin co-maintainer here

Annotation processing, in particular Lombok, is a super weird beast. It seems scala-maven-plugin doesn't support it, see https://github.com/davidB/scala-maven-plugin/issues/342 (was closed due to lack of activity/contribution).

Then, I recommend you isolate your Gatling tests in a dedicated module, so you can build your Lombok based test classes in a pure Java module that would publish a test jar and then have your Gatling module depend on this test-jar.

Answered By - Stéphane LANDELLE