make java-util-logging indy-ready (#15110)

Author: SylvainJuge

instrumentation/java-util-logging/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jul/JavaUtilLoggingInstrumentation.java

@@ -44,20 +44,19 @@ public void transform(TypeTransformer transformer) {
   public static class LogAdvice {
 
     @Advice.OnMethodEnter(suppress = Throwable.class)
-    public static void methodEnter(
-        @Advice.This Logger logger,
-        @Advice.Argument(0) LogRecord logRecord,
-        @Advice.Local("otelCallDepth") CallDepth callDepth) {
+    public static CallDepth methodEnter(
+        @Advice.This Logger logger, @Advice.Argument(0) LogRecord logRecord) {
       // need to track call depth across all loggers in order to avoid double capture when one
       // logging framework delegates to another
-      callDepth = CallDepth.forClass(LoggerProvider.class);
+      CallDepth callDepth = CallDepth.forClass(LoggerProvider.class);
       if (callDepth.getAndIncrement() == 0) {
         JavaUtilLoggingHelper.capture(logger, logRecord);
       }
+      return callDepth;
     }
 
     @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
-    public static void methodExit(@Advice.Local("otelCallDepth") CallDepth callDepth) {
+    public static void methodExit(@Advice.Enter CallDepth callDepth) {
       callDepth.decrementAndGet();
     }
   }

instrumentation/java-util-logging/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jul/JavaUtilLoggingInstrumentationModule.java

@@ -10,10 +10,12 @@
 import com.google.auto.service.AutoService;
 import io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule;
 import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
+import io.opentelemetry.javaagent.extension.instrumentation.internal.ExperimentalInstrumentationModule;
 import java.util.List;
 
 @AutoService(InstrumentationModule.class)
-public class JavaUtilLoggingInstrumentationModule extends InstrumentationModule {
+public class JavaUtilLoggingInstrumentationModule extends InstrumentationModule
+    implements ExperimentalInstrumentationModule {
 
   public JavaUtilLoggingInstrumentationModule() {
     super("java-util-logging");
@@ -23,4 +25,9 @@ public JavaUtilLoggingInstrumentationModule() {
   public List<TypeInstrumentation> typeInstrumentations() {
     return singletonList(new JavaUtilLoggingInstrumentation());
   }
+
+  @Override
+  public boolean isIndyReady() {
+    return true;
+  }
 }