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.returns;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  import co.elastic.clients.transport.Endpoint;
  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;
  
  // up to 8.8 (included)
  public class RestClientTransportInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("co.elastic.clients.transport.rest_client.RestClientTransport");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod()
              .and(named("prepareLowLevelRequest"))
              .and(takesArgument(1, named("co.elastic.clients.transport.Endpoint")))
              .and(returns(named("org.elasticsearch.client.Request"))),
          this.getClass().getName() + "$RestClientTransportAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class RestClientTransportAdvice {
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void onPrepareLowLevelRequest(
          @Advice.Argument(1) Endpoint<?, ?, ?> endpoint, @Advice.Return Request request) {
        VirtualField<Request, ElasticsearchEndpointDefinition> virtualField =
            VirtualField.find(Request.class, ElasticsearchEndpointDefinition.class);
        String endpointId = endpoint.id();
        if (endpointId.startsWith("es/") && endpointId.length() > 3) {
          endpointId = endpointId.substring(3);
        }
        virtualField.set(request, ElasticsearchEndpointMap.get(endpointId));
      }
    }
  }
  