awesome java apps with GraalVM and Java microservices frameworks

src: Awesome Java applications with GraalVM and Java microservices frameworks - 2023-03-22

Abstract

Demos on multiple frameworks to use GraalVM native images

• spring framework
• micronaute
• helidon
• quarkus Native image is natively supported by JUnit 5. We can compress native images with UPX.

Drawbacks:

• required build time step
  • computational effort necessary at build time
  • need a powerful machine with the same target architecture & OS
    • use it with Github Actions https://github.com/marketplace/actions/github-action-for-graalvm
  • develop in JIT for fast development, only use AOT for final deployment
  • for best throughput, use profile-guided optimizations:
    • native-image --pgo-instrument MyMainClass ./mymainclass
    • native-image --pgo=profile.ipfrof MyMainClass ./mymainclass
• GraalVM & Reflection
  • native image tries to resolve the target elements through a static analysis that detects calls to the Reflection API
  • easier way to handle reflection: use the following configuration in the native-maven-plugin:

<plugin>
  <groupId>org.graalvm.buildtools</groupId>
  <artifactId>native-maven-plugin</artifactId>
  <extensions>true</extensions>
  <executions>
    <execution>
      <id>build-native</id>
      <goals><goal>compile-no-fork</goal></goals>
      <phase>package</phase>
    </execution>
  </executions>
  <configuration>
    <metaRepository>
      <enabled>true</enabled>
    </metaRepository>
  <configuration>
</plugin>