code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.sdk.server.api;
  
  import org.eclipse.milo.opcua.sdk.server.Session;
  import org.eclipse.milo.opcua.sdk.server.subscriptions.Subscription;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UInteger;
  import org.eclipse.milo.opcua.stack.core.types.enumerated.TimestampsToReturn;
  import org.eclipse.milo.opcua.stack.core.types.structured.ReadValueId;
  
  public interface MonitoredItem {
  
      /**
       * @return the server-side id of this item.
       */
      UInteger getId();
  
      /**
       * @return the most recent {@link Session} that owned the subscription this item belongs to.
       */
      Session getSession();
  
      /**
       * @return the id of the {@link Subscription} this item belongs to.
       */
      UInteger getSubscriptionId();
  
      /**
       * @return the {@link ReadValueId} being monitored.
       */
      ReadValueId getReadValueId();
  
      /**
       * @return the {@link TimestampsToReturn}.
       */
      TimestampsToReturn getTimestampsToReturn();
  
      /**
       * @return {@code true} if this item should be sampled.
       */
      boolean isSamplingEnabled();
  
  }
  