content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.reactornetty.v0_9;
  
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static java.util.Collections.singletonList;
  
  import com.google.auto.service.AutoService;
  import io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import java.util.List;
  import java.util.function.BiConsumer;
  import java.util.function.BiFunction;
  import net.bytebuddy.matcher.ElementMatcher;
  import reactor.netty.http.client.HttpClient;
  
  /**
   * This instrumentation solves the problem of the correct context propagation through the roller
   * coaster of Project Reactor and Netty thread hopping. It uses two public hooks of {@link
   * HttpClient}: {@link HttpClient#mapConnect(BiFunction)} and {@link
   * HttpClient#doOnRequest(BiConsumer)} to pass context from the caller to Reactor to Netty.
   */
  @AutoService(InstrumentationModule.class)
  public class ReactorNettyInstrumentationModule extends InstrumentationModule {
  
    public ReactorNettyInstrumentationModule() {
      super("reactor-netty", "reactor-netty-0.9");
    }
  
    @Override
    public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
      // Removed in 1.0.0
      return hasClassesNamed("reactor.netty.tcp.InetSocketAddressUtil");
    }
  
    @Override
    public List<TypeInstrumentation> typeInstrumentations() {
      return singletonList(new HttpClientInstrumentation());
    }
  }
  