Auto-configure VirtualThreadMetrics

[nosan]

See gh-43122

I also verified these changes with a native image.

JDK

openjdk version "23.0.1" 2024-10-15
OpenJDK Runtime Environment Liberica-NIK-24.1.1-1 (build 23.0.1+13)
OpenJDK 64-Bit Server VM Liberica-NIK-24.1.1-1 (build 23.0.1+13, mixed mode, sharing)

---

pom.xml

<plugin>
    <groupId>org.graalvm.buildtools</groupId>
    <artifactId>native-maven-plugin</artifactId>
    <configuration>
        <buildArgs>
            <buildArg>--enable-monitoring=jfr</buildArg>
        </buildArgs>
    </configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
    <image>
        <env>
            <BP_NATIVE_IMAGE_BUILD_ARGUMENTS>--enable-monitoring=jfr</BP_NATIVE_IMAGE_BUILD_ARGUMENTS>
        </env>
    </image>
</configuration>
</plugin>

---

Both $ mvn -Pnative native:compile and $ mvn -Pnative spring-boot:build-image work fine.

2025-01-16T13:14:07.947Z  INFO 1 --- [gh-43122] [           main] task.gh43122.Gh43122Application          : Starting AOT-processed Gh43122Application using Java 23.0.1 with PID 1 (/workspace/task.gh43122.Gh43122Application started by cnb in /workspace)
2025-01-16T13:14:07.947Z  INFO 1 --- [gh-43122] [           main] task.gh43122.Gh43122Application          : No active profile set, falling back to 1 default profile: "default"
2025-01-16T13:14:07.959Z  INFO 1 --- [gh-43122] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8080 (http)
2025-01-16T13:14:07.960Z  INFO 1 --- [gh-43122] [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2025-01-16T13:14:07.961Z  INFO 1 --- [gh-43122] [           main] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.34]
2025-01-16T13:14:07.971Z  INFO 1 --- [gh-43122] [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2025-01-16T13:14:07.971Z  INFO 1 --- [gh-43122] [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 24 ms
2025-01-16T13:14:08.025Z  WARN 1 --- [gh-43122] [           main] i.m.c.i.binder.jvm.JvmGcMetrics          : GC notifications will not be available because no GarbageCollectorMXBean of the JVM provides any. GCs=[young generation scavenger, complete scavenger]
2025-01-16T13:14:08.029Z  INFO 1 --- [gh-43122] [           main] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 15 endpoints beneath base path '/actuator'
[warn][jfr,setting] @Deprecated JFR events, and leak profiling are not yet supported.
[warn][jfr,setting] @Deprecated JFR events, and leak profiling are not yet supported.
2025-01-16T13:14:08.090Z  INFO 1 --- [gh-43122] [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port 8080 (http) with context path '/'
2025-01-16T13:14:08.091Z  INFO 1 --- [gh-43122] [           main] task.gh43122.Gh43122Application          : Started Gh43122Application in 0.16 seconds (process running for 0.17)

GET http://localhost:8080/actuator/metrics

{
  "names": [
    "application.ready.time",
    "application.started.time",
    "disk.free",
    "disk.total",
    "executor.active",
    "executor.completed",
    "executor.pool.core",
    "executor.pool.max",
    "executor.pool.size",
    "executor.queue.remaining",
    "executor.queued",
    "http.server.requests.active",
    "jvm.classes.loaded",
    "jvm.classes.unloaded",
    "jvm.gc.overhead",
    "jvm.info",
    "jvm.memory.committed",
    "jvm.memory.max",
    "jvm.memory.used",
    "jvm.threads.daemon",
    "jvm.threads.live",
    "jvm.threads.peak",
    "jvm.threads.started",
    "jvm.threads.states",
    "jvm.threads.virtual.pinned",
    "jvm.threads.virtual.submit.failed",
    "logback.events",
    "process.cpu.usage",
    "process.files.max",
    "process.files.open",
    "process.start.time",
    "process.uptime",
    "ssl.chains",
    "system.cpu.count",
    "system.cpu.usage",
    "system.load.average.1m",
    "tomcat.sessions.active.current",
    "tomcat.sessions.active.max",
    "tomcat.sessions.alive.max",
    "tomcat.sessions.created",
    "tomcat.sessions.expired",
    "tomcat.sessions.rejected"
  ]
}

[mhalbritter]

Thanks @nosan !

[wilkinsona]

Gah, sorry @nosan and @mhalbritter. I meant to comment on this to say that we should review the use of a FactoryBean. They're largely considered to be a relic of XML-based configuration and the recommendation from the Framework team is that they should be avoided. I've opened #43956 so that we don't forget to revisit this before M2 is released.