content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.wicket;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  import io.opentelemetry.api.trace.Span;
  import io.opentelemetry.instrumentation.api.instrumenter.LocalRootSpan;
  import io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import java.lang.reflect.InvocationTargetException;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  import org.apache.wicket.WicketRuntimeException;
  
  public class DefaultExceptionMapperInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("org.apache.wicket.DefaultExceptionMapper");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("mapUnexpectedExceptions").and(takesArgument(0, named(Exception.class.getName()))),
          DefaultExceptionMapperInstrumentation.class.getName() + "$ExceptionAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ExceptionAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onExit(@Advice.Argument(0) Exception exception) {
        Span serverSpan = LocalRootSpan.fromContextOrNull(Java8BytecodeBridge.currentContext());
        if (serverSpan != null) {
          // unwrap exception
          Throwable throwable = exception;
          while (throwable.getCause() != null
              && (throwable instanceof WicketRuntimeException
                  || throwable instanceof InvocationTargetException)) {
            throwable = throwable.getCause();
          }
          // as we don't create a span for wicket we record exception on server span
          serverSpan.recordException(throwable);
        }
      }
    }
  }
  