/**
 * Palanthir - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
 * Belgium
 *
 * Copyright (c) 2012 The Chromium Authors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *    * 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.
 *    * Neither the name of Google Inc., the name of the CHU of Liege,
 * 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
 * OWNER 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.
 **/


#pragma once

#include "Connection.h"

namespace Palanthir
{
  namespace SQLite
  {
    class Transaction : public boost::noncopyable
    {
    private:
      Connection& connection_;

      // True when the transaction is open, false when it's already been committed
      // or rolled back.
      bool isOpen_;

    public:
      explicit Transaction(Connection& connection);
      ~Transaction();

      // Returns true when there is a transaction that has been successfully begun.
      bool IsOpen() const { return isOpen_; }

      // Begins the transaction. This uses the default sqlite "deferred" transaction
      // type, which means that the DB lock is lazily acquired the next time the
      // database is accessed, not in the begin transaction command.
      void Begin();

      // Rolls back the transaction. This will happen automatically if you do
      // nothing when the transaction goes out of scope.
      void Rollback();

      // Commits the transaction, returning true on success.
      void Commit();
    };
  }
}