Re: how to know wheter an object is still "alive"

[Frank Rehberger <frehberg gnome-de org>]

Marcus Lunzenauer wrote:

> In my application I have have to determine, whether that an object is still "alive" (reachable? active?) but I only have that object's IOR.
>
> I thought that the following code would do this for me, but it does not:
>
>
> static CORBA_Object
> getGovernor(const char *governorIOR, CORBA_Environment * ev){
>
>  CORBA_Object cur_gov = CORBA_OBJECT_NIL;
>
>  // CHECK: is the current governor still active?
>  if (governorIOR){
>
>   // translate IOR
>   cur_gov = (CORBA_Object) CORBA_ORB_string_to_object(global_orb, governorIOR, ev);
>
>   // that IOR is not translatable
>   if (ev->_major != CORBA_NO_EXCEPTION){
>
>     debug(DEFAULT_DEBUG_FLAGS, "Could not find registered governor.\n");
>     CORBA_exception_free(ev);
>
>     // FIXME: is this needed?
>     cur_gov = CORBA_OBJECT_NIL;
>
>   // DON'T DO ANYTHING; governor is still active
>   } else {
>     debug(DEFAULT_DEBUG_FLAGS, "Registered governor still active.\n");
>   }
>  }
>
>  return cur_gov;
> }
>  

please use CORBA_Object operation

CORBA_boolean  non_existent = CORBA_Object_non_existent (obj, ev);

This is a very lightweight request that is handled by servers object
container, object/service implementation is not involved.

Following GUI  CORBA tool  is using this operation to test liveness of
object in servers object container:
http://casa.in-berlin.de/gnome-ior.html

Regards, Frank

--
GNOME http://www.gnome.org
Frank Rehberger <frehberg gnome-de org>