content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.rediscala;
  
  import static io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge.currentContext;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasSuperType;
  import static io.opentelemetry.javaagent.instrumentation.rediscala.RediscalaSingletons.instrumenter;
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  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.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 redis.ActorRequest;
  import redis.BufferedRequest;
  import redis.RedisCommand;
  import redis.Request;
  import redis.RoundRobinPoolRequest;
  import scala.concurrent.ExecutionContext;
  import scala.concurrent.Future;
  
  public class RequestInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<ClassLoader> classLoaderOptimization() {
      return hasClassesNamed("redis.Request");
    }
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return hasSuperType(
          namedOneOf(
              "redis.ActorRequest",
              "redis.Request",
              "redis.BufferedRequest",
              "redis.RoundRobinPoolRequest"));
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod()
              .and(isPublic())
              .and(named("send"))
              .and(takesArgument(0, named("redis.RedisCommand")))
              .and(returns(named("scala.concurrent.Future"))),
          this.getClass().getName() + "$SendAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class SendAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(
          @Advice.Argument(0) RedisCommand<?, ?> cmd,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        Context parentContext = currentContext();
        if (!instrumenter().shouldStart(parentContext, cmd)) {
          return;
        }
  
        context = instrumenter().start(parentContext, cmd);
        scope = context.makeCurrent();
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void onExit(
          @Advice.This Object action,
          @Advice.Argument(0) RedisCommand<?, ?> cmd,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope,
          @Advice.Thrown Throwable throwable,
          @Advice.Return(readOnly = false) Future<Object> responseFuture) {
  
        if (scope == null) {
          return;
        }
        scope.close();
  
        ExecutionContext ctx = null;
        if (action instanceof ActorRequest) {
          ctx = ((ActorRequest) action).executionContext();
        } else if (action instanceof Request) {
          ctx = ((Request) action).executionContext();
        } else if (action instanceof BufferedRequest) {
          ctx = ((BufferedRequest) action).executionContext();
        } else if (action instanceof RoundRobinPoolRequest) {
          ctx = ((RoundRobinPoolRequest) action).executionContext();
        }
  
        if (throwable != null) {
          instrumenter().end(context, cmd, null, throwable);
        } else {
          responseFuture.onComplete(new OnCompleteHandler(context, cmd), ctx);
        }
      }
    }
  }
  