Migrating PathMatcherInstrumentation

Author: LikeTheSalad

instrumentation/pekko/pekko-http-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/pekkohttp/v1_0/server/PekkoHttpServerSingletons.java

@@ -6,14 +6,18 @@
 package io.opentelemetry.javaagent.instrumentation.pekkohttp.v1_0.server;
 
 import io.opentelemetry.instrumentation.api.instrumenter.Instrumenter;
+import io.opentelemetry.instrumentation.api.util.VirtualField;
 import io.opentelemetry.javaagent.bootstrap.internal.JavaagentHttpServerInstrumenters;
 import io.opentelemetry.javaagent.instrumentation.pekkohttp.v1_0.PekkoHttpUtil;
 import org.apache.pekko.http.scaladsl.model.HttpRequest;
 import org.apache.pekko.http.scaladsl.model.HttpResponse;
+import org.apache.pekko.http.scaladsl.server.PathMatcher;
 
 public final class PekkoHttpServerSingletons {
 
   private static final Instrumenter<HttpRequest, HttpResponse> INSTRUMENTER;
+  public static final VirtualField<PathMatcher<?>, String> PATH_MATCHER_FIELD =
+      VirtualField.find(PathMatcher.class, String.class);
 
   static {
     INSTRUMENTER =

instrumentation/pekko/pekko-http-1.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/pekkohttp/v1_0/server/route/PathMatcherInstrumentation.java

@@ -5,11 +5,11 @@
 
 package io.opentelemetry.javaagent.instrumentation.pekkohttp.v1_0.server.route;
 
+import static io.opentelemetry.javaagent.instrumentation.pekkohttp.v1_0.server.PekkoHttpServerSingletons.PATH_MATCHER_FIELD;
 import static net.bytebuddy.matcher.ElementMatchers.named;
 import static net.bytebuddy.matcher.ElementMatchers.returns;
 import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
 
-import io.opentelemetry.instrumentation.api.util.VirtualField;
 import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
 import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
 import net.bytebuddy.asm.Advice;
@@ -41,7 +41,7 @@ public static void onEnter(
         @Advice.Argument(0) Uri.Path prefix, @Advice.Return PathMatcher<?> result) {
       // store the path being matched inside a VirtualField on the given matcher, so it can be used
       // for constructing the route
-      VirtualField.find(PathMatcher.class, String.class).set(result, prefix.toString());
+      PATH_MATCHER_FIELD.set(result, prefix.toString());
     }
   }
 }