Using data sources for initializing applications
In order to refer to one or more data sources in an application, one may define a configuration or ini-file, which is used for initializing the application. When the application has been initialized, all data sources defined in different sections in the ini-file or as complex xml - options in the configuration file can easily be accessed.
By means of the configuration file, i.e. by defining data sources within the configuration or ini-file, you may also decide, whether the database is accessed locally or via a client server connection.
Of course, all what you can do with an application configuration, you may also program step by step in your application, i.e. application configurations are just a mean for making life easier.
The application configuration may also refer to a data source catalog, in which case data sources need not to be defined explicitly in the configuration file, but rather in a central data catalog, which might be defined with the ObjectCommander tool or by an OSI script file.
int main ( int argc, char *argv[] ) {
if ( argc < 2 ) THROW
Application::initialize(argv[1],argv[0],ConsoleApplication);
// Database1 must be a section in the configuration
DataSource ds("Database1");
ds.openDatabase(); // opens dictionary and database
Property persons(ds.database,"Person::Persons",Update);
// ... now you may access all person object instances
}