Currently the best I can see is to make *everything* a Rich... and hook into the open and close methods... but feels very ugly.
On Mon 23 Sep 2019 at 15:45, Stephen Connolly < stephen.alan.conno...@gmail.com> wrote: > We are using a 3rd party library that allocates some resources in one of > our topologies. > > Is there a listener or something that gets notified when the topology > starts / stops running in the Task Manager's JVM? > > The 3rd party library uses a singleton, so I need to initialize the > singleton when the first task is started on the task manager and clear out > the singleton when the last task is stopped in order to allow the topology > classloader to be unloadable. > > I had thought it could all be done from the Topology's main method, but > after much head-banging we were able to identify that *when run on a > distributed cluster* the main method is not invoked to start the topology > for each task manager. > -- Sent from my phone
