content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.rabbitmq;
  
  import static io.opentelemetry.javaagent.instrumentation.rabbitmq.RabbitInstrumenterHelper.RABBITMQ_COMMAND;
  
  import io.opentelemetry.api.common.AttributeKey;
  import io.opentelemetry.api.common.AttributesBuilder;
  import io.opentelemetry.context.Context;
  import io.opentelemetry.instrumentation.api.instrumenter.AttributesExtractor;
  import java.util.Date;
  import javax.annotation.Nullable;
  
  class RabbitDeliveryExperimentalAttributesExtractor
      implements AttributesExtractor<DeliveryRequest, Void> {
    private static final AttributeKey<Long> RABBITMQ_QUEUE_TIME =
        AttributeKey.longKey("rabbitmq.record.queue_time_ms");
  
    @Override
    public void onStart(
        AttributesBuilder attributes, Context parentContext, DeliveryRequest request) {
      Date timestamp = request.getProperties().getTimestamp();
      if (timestamp != null) {
        // this will be set if the sender sets the timestamp,
        // or if a plugin is installed on the rabbitmq broker
        long produceTimeMillis = timestamp.getTime();
        attributes.put(
            RABBITMQ_QUEUE_TIME, Math.max(0L, System.currentTimeMillis() - produceTimeMillis));
      }
  
      attributes.put(RABBITMQ_COMMAND, "basic.deliver");
    }
  
    @Override
    public void onEnd(
        AttributesBuilder attributes,
        Context context,
        DeliveryRequest request,
        @Nullable Void unused,
        @Nullable Throwable error) {}
  }
  