content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.elasticsearch.apiclient;
  
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.namedOneOf;
  import static net.bytebuddy.matcher.ElementMatchers.returns;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import io.opentelemetry.instrumentation.api.util.VirtualField;
  import io.opentelemetry.instrumentation.elasticsearch.rest.common.v5_0.internal.ElasticsearchEndpointDefinition;
  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;
  import org.elasticsearch.client.Request;
  
  // starting from 8.9
  public class RestClientHttpClientInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("co.elastic.clients.transport.rest_client.RestClientHttpClient");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod()
              .and(namedOneOf("performRequest", "performRequestAsync"))
              .and(takesArgument(0, String.class)),
          this.getClass().getName() + "$PerformRequestAdvice");
      transformer.applyAdviceToMethod(
          isMethod()
              .and(named("createRestRequest"))
              .and(returns(named("org.elasticsearch.client.Request"))),
          this.getClass().getName() + "$CreateRestRequestAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class PerformRequestAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static Scope onEnter(@Advice.Argument(0) String endpointId) {
        return EndpointId.storeInContext(Context.current(), endpointId).makeCurrent();
      }
  
      @Advice.OnMethodExit(suppress = Throwable.class, onThrowable = Throwable.class)
      public static void onExit(@Advice.Enter Scope scope) {
        if (scope != null) {
          scope.close();
        }
      }
    }
  
    @SuppressWarnings("unused")
    public static class CreateRestRequestAdvice {
  
      @Advice.OnMethodExit(suppress = Throwable.class, onThrowable = Throwable.class)
      public static void onExit(@Advice.Return Request request) {
        String endpointId = EndpointId.get(Context.current());
        if (endpointId == null) {
          return;
        }
        if (endpointId.startsWith("es/") && endpointId.length() > 3) {
          endpointId = endpointId.substring(3);
        }
        VirtualField.find(Request.class, ElasticsearchEndpointDefinition.class)
            .set(request, ElasticsearchEndpointMap.get(endpointId));
      }
    }
  }
  