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// file : odb/transaction.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_TRANSACTION_HXX
#define ODB_TRANSACTION_HXX
#include <odb/pre.hxx>
#include <odb/forward.hxx>
#include <odb/details/export.hxx>
namespace odb
{
class transaction_impl;
class LIBODB_EXPORT transaction
{
public:
typedef odb::database database_type;
explicit
transaction (transaction_impl*);
// Unless the transaction has already been finilized (explicitly
// committed or rolled back), the destructor will roll it back.
//
~transaction ();
void
commit ();
void
rollback ();
// Return the database this transaction is on.
//
database_type&
database ();
// Return current transaction or throw if there is no transaction
// in effect.
//
static transaction&
current ();
// Return true if there is a transaction in effect.
//
static bool
has_current ();
public:
transaction_impl&
implementation ();
// Copying or assignment of transactions is not supported.
//
private:
transaction (const transaction&);
transaction& operator= (const transaction&);
protected:
bool finilized_;
transaction_impl* impl_;
};
class LIBODB_EXPORT transaction_impl
{
protected:
friend class transaction;
typedef odb::database database_type;
transaction_impl (database_type& db)
: database_ (db)
{
}
virtual
~transaction_impl ();
virtual void
commit () = 0;
virtual void
rollback () = 0;
database_type&
database ()
{
return database_;
}
protected:
database_type& database_;
};
}
#include <odb/transaction.ixx>
#include <odb/post.hxx>
#endif // ODB_TRANSACTION_HXX
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