TransactionScope.cpp

Go to the documentation of this file.

/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  @file TransactionScope.cpp
 
  Paul Licameli split from DBConnection.cpp
 
**********************************************************************/
 
#include "TransactionScope.h"
#include "InconsistencyException.h"
#include <wx/log.h>
 
TransactionScopeImpl::~TransactionScopeImpl() = default;
 
TransactionScope::TransactionScope(
   AudacityProject &project, const char *name)
:  mName(name)
{
   mpImpl = Factory::Call(project);
   if (!mpImpl)
      return;
 
   mInTrans = mpImpl->TransactionStart(mName);
   if ( !mInTrans )
      // To do, improve the message
      throw SimpleMessageBoxException( ExceptionType::Internal,
         XO("Database error.  Sorry, but we don't have more details."), 
         XO("Warning"), 
         "Error:_Disk_full_or_not_writable"
      );
}
 
TransactionScope::~TransactionScope()
{
   if (mpImpl && mInTrans)
   {
      if (!mpImpl->TransactionRollback(mName))
      {
         // Do not throw from a destructor!
         // This has to be a no-fail cleanup that does the best that it can.
         wxLogMessage("Transaction active at scope destruction");
      }
   }
}
 
bool TransactionScope::Commit()
{
   if (mpImpl && !mInTrans) {
      wxLogMessage("No active transaction to commit");
      // Misuse of this class
      THROW_INCONSISTENCY_EXCEPTION;
   }
 
   // If commit is unsuccessful, consider us still in a commit, for the dtor
   // later
   mInTrans = !mpImpl->TransactionCommit(mName);
 
   return !mInTrans;
}