content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.rabbitmq;
  
  import com.rabbitmq.client.Envelope;
  import io.opentelemetry.api.common.AttributesBuilder;
  import io.opentelemetry.context.Context;
  import io.opentelemetry.instrumentation.api.instrumenter.AttributesExtractor;
  import io.opentelemetry.semconv.incubating.MessagingIncubatingAttributes;
  import javax.annotation.Nullable;
  
  class RabbitDeliveryExtraAttributesExtractor implements AttributesExtractor<DeliveryRequest, Void> {
  
    @Override
    public void onStart(
        AttributesBuilder attributes, Context parentContext, DeliveryRequest request) {
      Envelope envelope = request.getEnvelope();
      String routingKey = envelope.getRoutingKey();
      if (routingKey != null && !routingKey.isEmpty()) {
        attributes.put(
            MessagingIncubatingAttributes.MESSAGING_RABBITMQ_DESTINATION_ROUTING_KEY, routingKey);
      }
    }
  
    @Override
    public void onEnd(
        AttributesBuilder attributes,
        Context context,
        DeliveryRequest request,
        @Nullable Void unused,
        @Nullable Throwable error) {}
  }
  