RE: [Openjmx-devel] RMI adaptor and remote notifications

[Bordet, S. <Sim...@co...>]

Hi,

> > > > I've added possibility to receive in the client=20
> notifications from
> a
> > > > remote MBeanServer.
> > > >
> > > > Listeners are always remote, but NotificationFilters may be
> > > serialized
> > > to
> > > > the server and be executed there.
> > > >
> > > > Is there any preference on how filters must be treated ?
> > > >
> > > > 1) Always as remote, like listeners (will be executed in the
> client)
> > > > 2) Always serialized to the server (will executed in the server)
> > > I'm sure this is a lot more Network efficient
> > >
> > > > 3) try first with 2, if fails fall through to 1
> > > When may this happen?
> >=20
> > When filter implementation is not serializable.
> Ok, then my vote is for 3

Eh, not that simple.

Look at this filter

class MyFilter implements NotificationFilter=20
{
   public boolean isNotificationEnabled(Notification n)=20
   {
      List l =3D MBeanServerFactory.findMBeanServer(null);
      for (Iterator i =3D l.iterator(); i.hasNext();)=20
      {
         MBeanServer s =3D (MBeanServer)i.next();
         MBeanServerFactory.releaseMBeanServer(s);
      }
      return true;
   }
}

This will force us to run the agent always under security manager...

We want to leave open this security hole, and go for a simpler
implementation ?

We want many remote calls for each notification ?

Mumble, mumble...

Simon