Motivation
The standard and easy way of instrumenting a MibLeaf object is synchronous value update which is outlined below:
void myMibObject::get_request(Request* req, int ind)
{
//--AgentGen BEGIN=myMibObject::get_request
// Call my function here, return s, and put it into value by calling set_state(s)
// Then continue the get request which calls the SnmpDisplayString::get_request(req, ind) below...
//--AgentGen END
SnmpDisplayString::get_request(req, ind);
}
Some people might want to asynchronously retrieve requested values. An intuitial approach could read as followS:
void myMibObject::get_request(Request* req, int ind)
{
//--AgentGen BEGIN=myMibObject::get_request
// Callback ptr = &SnmpDisplayString::get_request(req, ind);
// Put req, pdu and callback_ptr into a message structure and send that in a message to the queue of another task.
// do not return any value now (won't be up-to-date)
if (FALSE)
//--AgentGen END
SnmpDisplayString::get_request(req, ind);
}
The problem with the above approach is: It will not work with AGENT++ (at least not without additional coding)!