content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.opensearch.rest.v3_0;
  
  import static io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge.currentContext;
  import static io.opentelemetry.javaagent.instrumentation.opensearch.rest.v3_0.OpenSearchRestSingletons.convertResponse;
  import static io.opentelemetry.javaagent.instrumentation.opensearch.rest.v3_0.OpenSearchRestSingletons.instrumenter;
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import io.opentelemetry.javaagent.instrumentation.opensearch.rest.OpenSearchRestRequest;
  import io.opentelemetry.javaagent.instrumentation.opensearch.rest.RestResponseListener;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  import org.opensearch.client.Request;
  import org.opensearch.client.Response;
  import org.opensearch.client.ResponseListener;
  
  public class RestClientInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("org.opensearch.client.RestClient");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod()
              .and(named("performRequest"))
              .and(takesArguments(1))
              .and(takesArgument(0, named("org.opensearch.client.Request"))),
          this.getClass().getName() + "$PerformRequestAdvice");
      transformer.applyAdviceToMethod(
          isMethod()
              .and(named("performRequestAsync"))
              .and(takesArguments(2))
              .and(takesArgument(0, named("org.opensearch.client.Request")))
              .and(takesArgument(1, named("org.opensearch.client.ResponseListener"))),
          this.getClass().getName() + "$PerformRequestAsyncAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class PerformRequestAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(
          @Advice.Argument(0) Request request,
          @Advice.Local("otelRequest") OpenSearchRestRequest otelRequest,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        Context parentContext = currentContext();
        otelRequest = OpenSearchRestRequest.create(request.getMethod(), request.getEndpoint());
        if (!instrumenter().shouldStart(parentContext, otelRequest)) {
          return;
        }
  
        context = instrumenter().start(parentContext, otelRequest);
        scope = context.makeCurrent();
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void stopSpan(
          @Advice.Return Response response,
          @Advice.Thrown Throwable throwable,
          @Advice.Local("otelRequest") OpenSearchRestRequest otelRequest,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        if (scope == null) {
          return;
        }
        scope.close();
  
        instrumenter().end(context, otelRequest, convertResponse(response), throwable);
      }
    }
  
    @SuppressWarnings("unused")
    public static class PerformRequestAsyncAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(
          @Advice.Argument(0) Request request,
          @Advice.Argument(value = 1, readOnly = false) ResponseListener responseListener,
          @Advice.Local("otelRequest") OpenSearchRestRequest otelRequest,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        Context parentContext = currentContext();
        otelRequest = OpenSearchRestRequest.create(request.getMethod(), request.getEndpoint());
        if (!instrumenter().shouldStart(parentContext, otelRequest)) {
          return;
        }
  
        context = instrumenter().start(parentContext, otelRequest);
        scope = context.makeCurrent();
  
        responseListener =
            new RestResponseListener(
                responseListener,
                parentContext,
                instrumenter(),
                context,
                otelRequest,
                OpenSearchRestSingletons::convertResponse);
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void stopSpan(
          @Advice.Thrown Throwable throwable,
          @Advice.Local("otelRequest") OpenSearchRestRequest otelRequest,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        if (scope == null) {
          return;
        }
        scope.close();
  
        if (throwable != null) {
          instrumenter().end(context, otelRequest, null, throwable);
        }
        // span ended in RestResponseListener
      }
    }
  }
  