content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.couchbase.v2_6;
  
  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 com.couchbase.client.core.message.CouchbaseRequest;
  import com.couchbase.client.deps.io.netty.channel.ChannelHandlerContext;
  import io.opentelemetry.instrumentation.api.util.VirtualField;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import io.opentelemetry.javaagent.instrumentation.couchbase.v2_0.CouchbaseRequestInfo;
  import java.util.List;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class CouchbaseNetworkInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("com.couchbase.client.core.endpoint.AbstractGenericHandler");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      // encode(ChannelHandlerContext ctx, REQUEST msg, List<Object> out)
      transformer.applyAdviceToMethod(
          isMethod()
              .and(named("encode"))
              .and(takesArguments(3))
              .and(
                  takesArgument(
                      0, named("com.couchbase.client.deps.io.netty.channel.ChannelHandlerContext")))
              .and(takesArgument(2, List.class)),
          CouchbaseNetworkInstrumentation.class.getName() + "$CouchbaseNetworkAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class CouchbaseNetworkAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void addNetworkTagsToSpan(
          @Advice.FieldValue("localSocket") String localSocket,
          @Advice.Argument(0) ChannelHandlerContext channelHandlerContext,
          @Advice.Argument(1) CouchbaseRequest request) {
  
        VirtualField<CouchbaseRequest, CouchbaseRequestInfo> virtualField =
            VirtualField.find(CouchbaseRequest.class, CouchbaseRequestInfo.class);
  
        CouchbaseRequestInfo requestInfo = virtualField.get(request);
        if (requestInfo != null) {
          requestInfo.setPeerAddress(channelHandlerContext.channel().remoteAddress());
          requestInfo.setLocalAddress(localSocket);
        }
      }
    }
  }
  