Just to expand after some investigation, this is wrong also in C++. The culprit seems to be the subscribePresenceCallback function in resource/src/InProcClientWrapper.cpp.
There's a nice comment there, when setting the url as third argument to the callback: "This is a hack while we rethink presence subscription". The quickest fix, at least for me, would be to rather use a unique identifier for the device there. On Wed, Jul 13, 2016 at 10:23 AM, Iovene, Salvatore <salvatore.iovene at intel.com> wrote: > Hi, > I'm developing an Iotivity client using Java, and I want to observe > the presence status of devices. > > So I'm using the `OcPlatform.subscribePresence` API, and passing a > `OcPlatform.OnPresenceListener` to it. > > I have a couple of questions about the `onPresence` method: > > 1. What is the `nonce` argument? The API docs don't explain it. > 2. This method only gives me a `hostAddress`, and that's not enough to > identify which devices had a presence change, because you can have > multiple devices on the same network. > > Is this an oversight in the Java API? > > Thanks in advance! > Salvatore > > > -- > Salvatore Iovene <salvatore.iovene at intel.com> > Linux Software Engineer > Intel Open Source Technology Center, Finland > Tel.: +358504804026 -- Salvatore Iovene <salvatore.iovene at intel.com> Linux Software Engineer Intel Open Source Technology Center, Finland Tel.: +358504804026
