rewrite-spring now requires Java 11 via rewrite-micrometer

[gjd6640]

As a heads-up: Anyone whose JAVA_HOME is set to a Java 8 installation will fail with the below error when they use the current release of rewrite-maven-plugin. You'll need to adjust JAVA_HOME to a modern JVM version to use it.

[ERROR] Failed to execute goal org.openrewrite.maven:rewrite-maven-plugin:5.36.0:run (default-cli) on project ntp-timed-job-train-exception-monitor: Execution default-cli of goal org.openrewrite.maven:rewrite-maven-plugin:5.36.0:run failed: Could not load class org.openrewrite.micrometer.TimerToObservation : java.lang.UnsupportedClassVersionError: org/openrewrite/micrometer/TimerToObservation has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0 -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.openrewrite.maven:rewrite-maven-plugin:5.36.0:run (default-cli) on project ntp-timed-job-train-exception-monitor: Execution default-cli of goal org.openrewrite.maven:rewrite-maven-plugin:5.36.0:run failed: Could not load class org.openrewrite.micrometer.TimerToObservation : java.lang.UnsupportedClassVersionError: org/openrewrite/micrometer/TimerToObservation has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)

Note that something similar happened previously and is documented in this discussion thread. In that case, @timtebeek acted by cutting a new release that again supported Java 8. That may be needed again.

Command line used:

mvn -e org.openrewrite.maven:rewrite-maven-plugin:run "-Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-spring:RELEASE" "-Drewrite.activeRecipes=com.MyCompany.cve.UpgradeToSpringFramework5NoSpringBoot,com.MyCompany.cve.ApplySafeCVEFixesConditionally,com.MyCompany.recommended.FixBestPractices,com.MyCompany.recommended.UpdateToLatestTooling" "-Drewrite.exportDatatables=true" "-Drewrite.configLocation=target/remediation-plugin/rewrite.yml"

[gjd6640]

Looks like an alternative to switching to a newer JVM version is to use a prior release of the rewrite-spring library like so:

mvn -e org.openrewrite.maven:rewrite-maven-plugin:run "-Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-spring:5.14.0" blah blah

[timtebeek]

Thanks for the quick heads up once again @gjd6640 ; In this case it's rewrite-micrometer that giving us trouble, due to
https://github.com/openrewrite/rewrite-micrometer/blob/37b2aab82712c5cab1da8e1e1917d2da219edb05/build.gradle.kts#L8-L11

That was newly included in the Spring Boot 3.3 upgrades, as it's a requirement to also upgrade Micrometer.

• openrewrite/rewrite-spring@196dc5f

Perhaps for now the quickest solution would be to remove that dependency rewrite-spring until we figure out a next step.

[timtebeek]

• I've logged an issue to track: rewrite-micrometer has a runtime requirement of Java 11 rewrite-micrometer#12

[timtebeek]

I've just released a new patch version of rewrite-spring that should clear out this issue

• https://github.com/openrewrite/rewrite-spring/releases/tag/v5.15.1

[gjd6640]

I've verified that this version works with Java 8. Thanks!

[timtebeek]

Thanks for the quick call out and verification of the fix!