io.opentelemetry.javaagent.instrumentation.myfaces.RestoreViewExecutorInstrumentation Maven / Gradle / Ivy

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Instrumentation of Java libraries using OpenTelemetry.

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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.javaagent.instrumentation.myfaces;

import static io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge.currentContext;
import static net.bytebuddy.matcher.ElementMatchers.named;
import static net.bytebuddy.matcher.ElementMatchers.takesArgument;

import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
import io.opentelemetry.javaagent.instrumentation.jsf.javax.JsfServerSpanNaming;
import javax.faces.context.FacesContext;
import net.bytebuddy.asm.Advice;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.matcher.ElementMatcher;

public class RestoreViewExecutorInstrumentation implements TypeInstrumentation {

  @Override
  public ElementMatcher typeMatcher() {
    return named("org.apache.myfaces.lifecycle.RestoreViewExecutor");
  }

  @Override
  public void transform(TypeTransformer transformer) {
    transformer.applyAdviceToMethod(
        named("execute").and(takesArgument(0, named("javax.faces.context.FacesContext"))),
        RestoreViewExecutorInstrumentation.class.getName() + "$ExecuteAdvice");
  }

  @SuppressWarnings("unused")
  public static class ExecuteAdvice {

    @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
    public static void onExit(@Advice.Argument(0) FacesContext facesContext) {
      JsfServerSpanNaming.updateViewName(currentContext(), facesContext);
    }
  }
}