Piles

Persistent storage pile used for storing key/value pairs on different underlying objects.

The pile provides an interface in the form of PerSt class and a number of providers:

• registry - based on QSettings and registry
• config - based on QSettings and file system
• xml - based on an XML file

Instantiating and general management is performed through PerStFactory class and it also allows custom providers to be added.

Usage

Initialization and termination needs to be done once per application:

PerStFactory::init ();
// ...
PerStFactory::end ();

To create a new file-based instance with QSettings back-end and read the content if the file "config.ini" exists use:

PerSt * result = PerStFactory::create (
    "config",
    "config.ini");
result->beginGroup ("general");
int port = result->valueInt ("in_port");
++port;
result->setValue ("out_port", port);
result->endGroup ("general");
// ...
delete result;

Dependencies

• Qt (either 4.X or 5.X) is optional (the pile uses QString used for strings but it may also use std::string);
• UserMsg pile