jeanbisutti / spring-native-image-aot-inst-poc

Spring native & AOT instrumentation (POC)

The goal of this project is to try to add ahead-of-time (AOT) instrumentation to a Spring native image.

An alternative approach with programmatic instrumentation is available here.

To test this project

We are going to apply the following transformations:

Spring Boot jar with Spring AOT processing => AOT instrumentation => native image

First, clone this project.

Execute mvn install.

After, you need a Spring Boot 3 application. You can use this one in this project.

Execute cd spring-boot-app-demo and then mvn -Pnative native:compile, that will generate a jar with the Spring ahead-of-time processing applied.

Then, apply ahead-of-time instrumentation. execute this test.

Finally, transform the jar containing the Spring AOT processing and the AOT instrumentation to a native image:

pack build --builder paketobuildpacks/builder:tiny --path target/spring-boot-3-app-instrumented.jar --env BP_NATIVE_IMAGE=true image-native-aot

It will fail with the unlinkat /workspace/META-INF/maven: permission denied error. To do to make it works: add the drwxr-xr-x Unix file attribute for JAR directories and -rw-r--r-- for the JAR files.