LocalTransaction.js

/**
 * @license
 * Copyright (C) 2020–2025 Pryv S.A. https://pryv.com
 *
 * This file is part of Open-Pryv.io and released under BSD-Clause-3 License
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
const { getDatabase } = require('../index');
const defaultOptions = {
  readPreference: 'primary',
  readConcern: { level: 'local' },
  writeConcern: { w: 'majority' }
};
/**
 * Per-user events data
 */
class LocalTransaction {
  transactionSession;

  transactionOptions;
  constructor (transactionOptions) {
    this.transactionOptions = transactionOptions || defaultOptions;
  }

  /**
   * @returns {Promise<void>}
   */
  async init () {
    const database = await getDatabase();
    this.transactionSession = await database.startSession();
  }

  /**
   *
   * @param {Function} func  undefined
   * @returns {Promise<void>}
   */
  async exec (func) {
    await this.transactionSession.withTransaction(func, this.transactionOptions);
  }

  /**
   * @returns {Promise<void>}
   */
  async commit () {
    throw new Error('not implemented');
  }

  /**
   * @returns {Promise<void>}
   */
  async rollback () {
    throw new Error('not implemented');
  }
}
module.exports = LocalTransaction;