content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.apachecamel;
  
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.implementsInterface;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  import org.apache.camel.CamelContext;
  
  public class CamelContextInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<ClassLoader> classLoaderOptimization() {
      return hasClassesNamed("org.apache.camel.CamelContext");
    }
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return implementsInterface(named("org.apache.camel.CamelContext"));
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("start").and(isPublic()).and(takesArguments(0)),
          this.getClass().getName() + "$StartAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class StartAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onContextStart(@Advice.This CamelContext context) throws Exception {
  
        if (context.hasService(CamelTracingService.class) == null) {
          // start this service eager so we init before Camel is starting up
          context.addService(new CamelTracingService(context), true, true);
        }
      }
    }
  }
  