/*
 *     Copyright 2021-Present Couchbase, Inc.
 *
 *   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
 *
 *       http://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.
 */
#pragma once

#include <cstdint>

namespace couchbase::transactions
{
/**
 * Strategy to deal with potential read skews while reading multiple documents.
 *
 * Essentially when a transaction reads document X and then Y, and another
 * transaction commits a change to Y inbetween those reads - read skew has
 * occurred.
 */
enum class transaction_get_multi_mode : std::uint8_t {
  /**
   * Some time-bounded effort will be made to detect and avoid read skew.
   */
  prioritise_latency,

  /**
   * No read skew detection should be attempted. Once the documents are fetched, they will be
   * returned immediately.
   */
  disable_read_skew_detection,

  /**
   * Great effort will be made to detect and avoid read skew.
   */
  prioritise_read_skew_detection,
};

} // namespace couchbase::transactions
