content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.ktor.v2_0;
  
  import static net.bytebuddy.matcher.ElementMatchers.isConstructor;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import io.ktor.server.application.Application;
  import io.ktor.server.application.ApplicationPluginKt;
  import io.opentelemetry.api.GlobalOpenTelemetry;
  import io.opentelemetry.instrumentation.ktor.v2_0.KtorServerTelemetryBuilderKt;
  import io.opentelemetry.instrumentation.ktor.v2_0.common.AbstractKtorServerTelemetryBuilder;
  import io.opentelemetry.instrumentation.ktor.v2_0.common.internal.KtorBuilderUtil;
  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 ServerInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("io.ktor.server.engine.ApplicationEngineEnvironmentReloading");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isConstructor(), this.getClass().getName() + "$ConstructorAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ConstructorAdvice {
  
      @Advice.OnMethodExit
      public static void onExit(@Advice.FieldValue("_applicationInstance") Application application) {
        ApplicationPluginKt.install(
            application, KtorServerTelemetryBuilderKt.getKtorServerTelemetry(), new SetupFunction());
      }
    }
  
    public static class SetupFunction
        implements Function1<AbstractKtorServerTelemetryBuilder, kotlin.Unit> {
  
      @Override
      public Unit invoke(AbstractKtorServerTelemetryBuilder builder) {
        builder.setOpenTelemetry(GlobalOpenTelemetry.get());
        KtorBuilderUtil.serverBuilderExtractor.invoke(builder).configure(AgentCommonConfig.get());
        return kotlin.Unit.INSTANCE;
      }
    }
  }
  