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Instrumentation of Java libraries using OpenTelemetry.

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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.javaagent.instrumentation.jaxrs.v3_0;

import static net.bytebuddy.matcher.ElementMatchers.named;
import static net.bytebuddy.matcher.ElementMatchers.namedOneOf;
import static net.bytebuddy.matcher.ElementMatchers.takesArgument;

import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
import jakarta.ws.rs.core.Request;
import net.bytebuddy.asm.Advice;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.matcher.ElementMatcher;

public class JerseyResourceMethodDispatcherInstrumentation implements TypeInstrumentation {

  @Override
  public ElementMatcher typeMatcher() {
    return named("org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher");
  }

  @Override
  public void transform(TypeTransformer transformer) {
    transformer.applyAdviceToMethod(
        named("dispatch")
            .and(
                takesArgument(
                    1,
                    namedOneOf(
                        "javax.ws.rs.core.Request",
                        "org.glassfish.jersey.server.ContainerRequest"))),
        JerseyResourceMethodDispatcherInstrumentation.class.getName() + "$DispatchAdvice");
  }

  @SuppressWarnings("unused")
  public static class DispatchAdvice {

    @Advice.OnMethodEnter(suppress = Throwable.class)
    public static void onEnter(@Advice.Argument(1) Request request) {
      JerseySpanName.INSTANCE.updateServerSpanName(request);
    }
  }
}