On Tue, Feb 18, 2014 at 2:12 AM, Brian Gerkey wrote: > On Mon, Feb 17, 2014 at 9:06 AM, Wrede, Sebastian > wrote: > > * How will services / RPC be implemented with DDS? Is there already an > > accepted standard protocol for doing RPC over DDS? > > My understanding is: (i) the current DDS spec doesn't include what we > call services; (ii) there's an extension for services that is > currently under consideration and may make its way into a future > revision of the spec; and (iii) some current implementations have > vendor-specific extensions for services. > I know that many people feel otherwise, but in my personal opinion, services are a bad idea anyway, and what we really want is something more like (though not necessarily exactly the same) what actionlib offers. That is, something which *explicitly* acknowledges that there are always packets/messages underneath, that there is asynchronicity, and that there may be impossibility to act *in the protocol*. Just saying ;-) cheers -- Ingo Lütkebohle, Dr.-Ing. Machine Learning and Robotics Lab, IPVS, Universität Stuttgart http://www.ipvs.uni-stuttgart.de/abteilungen/mlr/abteilung/mitarbeiter/Ingo.Luetkebohle +49-711-685-88350 PGP Fingerprint 3187 4DEC 47E6 1B1E 6F4F 57D4 CD90 C164 34AD CE5B