content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.jaxws.v2_0;
  
  import static io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge.currentContext;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.implementsInterface;
  import static io.opentelemetry.javaagent.instrumentation.jaxws.v2_0.JaxWsSingletons.instrumenter;
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import io.opentelemetry.javaagent.bootstrap.CallDepth;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import io.opentelemetry.javaagent.instrumentation.jaxws.common.JaxWsRequest;
  import javax.xml.ws.Provider;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class WebServiceProviderInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<ClassLoader> classLoaderOptimization() {
      return hasClassesNamed("javax.xml.ws.Provider");
    }
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return implementsInterface(named("javax.xml.ws.Provider"));
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod().and(isPublic()).and(named("invoke")).and(takesArguments(1)),
          WebServiceProviderInstrumentation.class.getName() + "$InvokeAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class InvokeAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void startSpan(
          @Advice.This Object target,
          @Advice.Origin("#m") String methodName,
          @Advice.Local("otelCallDepth") CallDepth callDepth,
          @Advice.Local("otelRequest") JaxWsRequest request,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
        callDepth = CallDepth.forClass(Provider.class);
        if (callDepth.getAndIncrement() > 0) {
          return;
        }
  
        Context parentContext = currentContext();
        request = new JaxWsRequest(target.getClass(), methodName);
        if (!instrumenter().shouldStart(parentContext, request)) {
          return;
        }
  
        context = instrumenter().start(parentContext, request);
        scope = context.makeCurrent();
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void stopSpan(
          @Advice.Thrown Throwable throwable,
          @Advice.Local("otelCallDepth") CallDepth callDepth,
          @Advice.Local("otelRequest") JaxWsRequest request,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
        if (callDepth.decrementAndGet() > 0 || scope == null) {
          return;
        }
  
        scope.close();
        instrumenter().end(context, request, null, throwable);
      }
    }
  }
  