content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.internal.logging;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.namedOneOf;
  
  import io.opentelemetry.javaagent.bootstrap.logging.ApplicationLoggerFlags;
  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;
  
  public class LoggingApplicationListenerInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return namedOneOf(
          // spring boot 1.x
          "org.springframework.boot.logging.LoggingApplicationListener",
          // spring boot 2.+
          "org.springframework.boot.context.logging.LoggingApplicationListener");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      // the logger is properly initialized once this method exits
      transformer.applyAdviceToMethod(
          named("initialize"), this.getClass().getName() + "$InitializeAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class InitializeAdvice {
  
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static void onExit() {
        if (ApplicationLoggerFlags.bridgeSpringBootLogging()) {
          Slf4jApplicationLoggerBridge.install();
        }
      }
    }
  }
  