Downloadable - Hewlett-Packard

Callbacks are defined as follows:
MCC_T_CVR proc ( FEvent& event, const MEntitySpec& filter )
{
// ….
return MCC_S_NORMAL;
}
The event is passed as a non-constant (modifiable) variable for practical reasons (access to all
methods of the class FEvent). It should however not be modified. Modification to the event
will have no effects other than being passed on to the next callbacks (same object passed to all
callbacks).
Each customized user library defines (optionally) a public function called initialize().It
is mandatory to define the initialize() function in order to use discarding features. The
initialize() function is responsible for advertising any discarded event callback using
the discarded_events_add_callback() function:
void initialize()
{
discarded_events_add_callback(“mylib”,my_callback_1);
discarded_events_add_callback(“mylib”,my_callback_2);
…
}
The callbacks and the initialization function can be defined in the same library than the
corrective filter action routines or in a different library.
Example
Below is an example of custom library with action routines and callbacks:
#include
extern "C"
{
/* action routine */
MCC_T_CVR SetAdditionalText(
FEvent& event,
const MSetOf &values)
{
event.SetAdditionalText(values[1]);
return MCC_S_NORMAL ;
}
/* callback */
MCC_T_CVR log_event(FEvent &event,const MEntitySpec &filter)
{
MTraceStream trace(0x1);
trace