Data 3 ProLinga-Data Library Data Class used to manage Data connections and process Data Commands. #include <prolinga/Data.hpp> class PlData { public: PlData(); ~PlData(); void dataOpen (const char *configFileName, int argc, char **argv); void dataClose (void); xmlDocPtr executeCommand (const xmlDocPtr dataRequest); ... }; typedef PlData *PlDataPtr; This class is used to connect to a Data environment and executes a Data Command. PlData::dataOpen void PlData::dataOpen (const char *configFileName, int argc, char **argv); This function is called to initialize a connection to the Data environment. Function PlData::dataClose must be called when access to the Data is no longer needed in order to close all handles and to free memory. configFileName : the name or the Data configuration file. If the argument is set to NULL, the Data default configuration file (etc/prolingadatcfg.xml) will be used. argc : argument passed on to libgda environment, usually argc from main(). It is unclear from the libgda documentation where it is used for. argv : argument passed on to libgda environment, usually argv from main(). It is unclear from the libgda documentation where it is used for. PlData::dataClose void PlData::dataClose (void); This function is called to close a connection to the Data environment. All handles and allocated memory will be freed. PlData::executeCommand xmlDocPtr PlData::executeCommand (const xmlDocPtr dataRequest); This function presents a Data Command to the Data processing engine. The command gets processed and a result returned. The returned XML document needs to be freed manually when it is no longer needed. Returns : the Data Command response as a libxml2 XML document.