content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package io.aeron.driver;
  
  import org.agrona.concurrent.status.Position;
  
  /**
   * Consumption position a subscriber has got to within a {@link SubscriptionLink}.
   */
  final class SubscriberPosition
  {
      private final SubscriptionLink subscriptionLink;
      private final Subscribable subscribable;
      private final Position position;
  
      SubscriberPosition(
          final SubscriptionLink subscriptionLink, final Subscribable subscribable, final Position position)
      {
          this.subscriptionLink = subscriptionLink;
          this.subscribable = subscribable;
          this.position = position;
      }
  
      Position position()
      {
          return position;
      }
  
      int positionCounterId()
      {
          return position().id();
      }
  
      SubscriptionLink subscription()
      {
          return subscriptionLink;
      }
  
      void addLink(final PublicationImage image)
      {
          subscriptionLink.link(image, position);
      }
  
      /**
       * {@inheritDoc}
       */
      public String toString()
      {
          return "SubscriberPosition{" +
              "subscriptionLink=" + subscriptionLink +
              ", subscribable=" + subscribable +
              ", position=" + position +
              '}';
      }
  }
  