we would like to hear some comments on this. any idea will do good, so let us hear what you guys are thinking about this. also any milestone for extension are planned or not.
currently any parameter events such as changed or deleted parameter using ParameterEvent.msg will be notified via “parameter_events”. this single topic will be used for all of parameter activities.
it is really simple enough to use only single topic to notify parameter events, but from user perspective we like to receive the event that we are interested in only. we can filter the event from parameter_events topic but we must receive all of the events anyway. we do not actually want to receive the event if not necessary.
there would be some options i guess,
- all parameter events via single topic “parameter_events” (current)
- parameter events via topics for each node (user can specify whose parameter is interesting)
- each parameter via each topic (user can specify which parameter is interesting)