content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.ktor.v3_0;
  
  import static net.bytebuddy.matcher.ElementMatchers.isConstructor;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  import io.ktor.client.HttpClientConfig;
  import io.ktor.client.engine.HttpClientEngineConfig;
  import io.opentelemetry.api.GlobalOpenTelemetry;
  import io.opentelemetry.instrumentation.ktor.v2_0.common.internal.KtorBuilderUtil;
  import io.opentelemetry.instrumentation.ktor.v3_0.KtorClientTelemetry;
  import io.opentelemetry.instrumentation.ktor.v3_0.KtorClientTelemetryBuilder;
  import io.opentelemetry.javaagent.bootstrap.internal.AgentCommonConfig;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import kotlin.Unit;
  import kotlin.jvm.functions.Function1;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class HttpClientInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("io.ktor.client.HttpClient");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isConstructor()
              .and(takesArguments(2))
              .and(takesArgument(1, named("io.ktor.client.HttpClientConfig"))),
          this.getClass().getName() + "$ConstructorAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ConstructorAdvice {
  
      @Advice.OnMethodEnter
      public static void onEnter(
          @Advice.Argument(1) HttpClientConfig<HttpClientEngineConfig> httpClientConfig) {
        httpClientConfig.install(KtorClientTelemetry.Companion, new SetupFunction());
      }
    }
  
    public static class SetupFunction implements Function1<KtorClientTelemetryBuilder, Unit> {
  
      @Override
      public Unit invoke(KtorClientTelemetryBuilder builder) {
        builder.setOpenTelemetry(GlobalOpenTelemetry.get());
        KtorBuilderUtil.clientBuilderExtractor.invoke(builder).configure(AgentCommonConfig.get());
        return Unit.INSTANCE;
      }
    }
  }
  