content: /*
   * Latke - 一款以 JSON 为主的 Java Web 框架
   * Copyright (c) 2009-present, b3log.org
   *
   * Latke is licensed under Mulan PSL v2.
   * You can use this software according to the terms and conditions of the Mulan PSL v2.
   * You may obtain a copy of Mulan PSL v2 at:
   *         http://license.coscl.org.cn/MulanPSL2
   * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
   * See the Mulan PSL v2 for more details.
   */
  package org.b3log.latke.repository;
  
  import java.util.UUID;
  
  /**
   * Transaction.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.3, Oct 31, 2018
   */
  public interface Transaction {
  
      /**
       * Gets the id of this transaction.
       *
       * @return id
       */
      default String getId() {
          return UUID.randomUUID().toString();
      }
  
      /**
       * Commits this transaction.
       *
       * <p>
       * <b>Throws</b>:<br/>
       * {@link java.lang.IllegalStateException} - if the transaction has already been committed, rolled back
       * </p>
       */
      void commit();
  
      /**
       * Rolls back this transaction.
       *
       * <p>
       * <b>Throws</b>:<br/>
       * {@link java.lang.IllegalStateException} - if the transaction has already been committed, rolled back
       * </p>
       */
      void rollback();
  
      /**
       * Determines whether this transaction is active.
       *
       * @return {@code true} if this transaction is active, returns {@code false} otherwise
       */
      boolean isActive();
  }
  