Subj : Persistency frameworks ?
To   : comp.programming
From : lothar.behrens@lollisoft.de
Date : Sat Sep 24 2005 09:25 am

Hi,

I am thinking about my configuration data, that resides in a database.
So there are spread around many SQL queries to get the data out.

What is the best to fasten up the data retrival ?

Make the data persistent in another format/file without a complete
rewrite of my class structure ?

Best way of syncing the data from the database and the one in any file
?

I think about macros in a C++ environment like this:
class classname {
PERSISTENCY_BEGIN_STATIC_DATA(classname)
  char[100] data1,
  char[10]  data2,
  int       data3
PERSISTENCY_END_STATIC_DATA

PERSISTENCY_BEGIN_AGREGATED_DATA(classname)
  PersistentClassA *data1,
  PersistentClassB *data2
PERSISTENCY_END_AGREGATED_DATA

DECLARE_PERSISTENCY(classname)
};

This simply would implement a stream based persistency, but don't care
about
syncing the data with them in a database. It also implies creation of
code to
read configuration data into a memory based representation.

Are these requirements all togehter possible ?

Where to read on for similar issues ?

Thanks, Lothar

.