DbSafeTransaction.h

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// Copyright (C) 2002-2017, Open Design Alliance (the "Alliance"). 
// All rights reserved. 
// 
// This software and its documentation and related materials are owned by 
// the Alliance. The software may only be incorporated into application 
// programs owned by members of the Alliance, subject to a signed 
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable  
// trade secrets of the Alliance and its suppliers. The software is also 
// protected by copyright law and international treaty provisions. Application  
// programs incorporating this software must include the following statement 
// with their copyright notices:
//   
//   This application incorporates Teigha(R) software pursuant to a license 
//   agreement with Open Design Alliance.
//   Teigha(R) Copyright (C) 2002-2017 by Open Design Alliance. 
//   All rights reserved.
//
// By use of this software, its documentation or related materials, you 
// acknowledge and accept the above terms.
 
 
 
 
#ifndef _ODDBSAFETRANSACTION_INCLUDED_
#define _ODDBSAFETRANSACTION_INCLUDED_
 
#include "TD_PackPush.h"
 
#include "RxObject.h"
#include "StaticRxObject.h"
#include "DbTransactionReactor.h"
 
 
class OdDbSafeTransaction : private OdStaticRxObject<OdDbTransactionReactor>
{
  int m_nCounter;
  OdDbDatabase* m_pTrackedDB;
 
  OdDbSafeTransaction& operator = (const OdDbSafeTransaction& other);
 
void transactionStarted(OdDbDatabase* )  { ++m_nCounter; }
  void transactionEnded(OdDbDatabase* pTrackedDb)
  {
    if(!--m_nCounter)
      pTrackedDb->removeTransactionReactor(this);
  }
  void transactionAborted(OdDbDatabase* pTrackedDb)
  {
    if(!--m_nCounter)
      pTrackedDb->removeTransactionReactor(this);
  }
public:
  OdDbSafeTransaction(OdDbDatabase* pTrackedDb)
  : m_nCounter(0), m_pTrackedDB(pTrackedDb)
  {
    if (m_pTrackedDB)
    {
      m_pTrackedDB->addTransactionReactor(this);
    }
  }
 
        ~OdDbSafeTransaction()
  { 
    m_pTrackedDB->removeTransactionReactor(this);
    while(m_nCounter--)
      m_pTrackedDB->abortTransaction();
  }
};
 
#include "TD_PackPop.h"
 
#endif // _ODDBSAFETRANSACTION_INCLUDED_