content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.alibabadruid.v1_0;
  
  import static io.opentelemetry.javaagent.instrumentation.alibabadruid.v1_0.DruidSingletons.telemetry;
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  import static net.bytebuddy.matcher.ElementMatchers.isStatic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import com.alibaba.druid.pool.DruidDataSourceMBean;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import javax.management.ObjectName;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class DruidDataSourceInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("com.alibaba.druid.stat.DruidDataSourceStatManager");
    }
  
    @Override
    public void transform(TypeTransformer typeTransformer) {
      typeTransformer.applyAdviceToMethod(
          isMethod().and(isPublic()).and(isStatic()).and(named("addDataSource")),
          this.getClass().getName() + "$AddDataSourceAdvice");
  
      typeTransformer.applyAdviceToMethod(
          isMethod().and(isPublic()).and(isStatic()).and(named("removeDataSource")),
          this.getClass().getName() + "$RemoveDataSourceAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class AddDataSourceAdvice {
  
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static void onExit(
          @Advice.Argument(0) Object dataSource, @Advice.Return ObjectName objectName) {
        DruidDataSourceMBean druidDataSource = (DruidDataSourceMBean) dataSource;
        String dataSourceName =
            objectName.getKeyProperty("type") + "-" + objectName.getKeyProperty("id");
        telemetry().registerMetrics(druidDataSource, dataSourceName);
      }
    }
  
    @SuppressWarnings("unused")
    public static class RemoveDataSourceAdvice {
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static void onExit(@Advice.Argument(0) Object dataSource) {
        DruidDataSourceMBean druidDataSource = (DruidDataSourceMBean) dataSource;
        telemetry().unregisterMetrics(druidDataSource);
      }
    }
  }
  