bonobo-context

Description

The bonobo-context code is designed to provide a way to expose CORBA contexts through a single C interface. This is so that language bindings can get away with wrapping a single function, and yet have access to the whole Bonobo service framework. Two examples of this are the MonikerContext and the RunningContext ( see Bonobo_Context.idl ).

Bonobo_MonikerContext context;
Bonobo_Unknown        object;

context = bonobo_context_get ("Activation", NULL);

if (context == CORBA_OBJECT_NIL)
	g_error (_("Internal error, no activation context"));

object = Bonobo_MonikerContext_getObject (
	"file:/demo/a.jpeg", "Bonobo/Control", ev);
...
     

The list of contexts is open and may be expanded in the future, currently there are the following:

• Activation - Bonobo/MonikerContext

• Running - Bonobo/RunningContext

The running context is particularly useful for ensuring that server processes exit cleanly when all their objects and derived objects are dead. To do this we can simply do the following:

static void
last_unref_exit_cb (gpointer      context,
		    BonoboObject *factory)
{
        bonobo_object_unref (factory);
	gtk_main_quit();
}
...
int main (int argc, char **argv)
{
	...
	bonobo_running_context_ignore_object (BONOBO_OBJREF (object));

	gtk_signal_connect (GTK_OBJECT (bonobo_context_running_get()),
			    "last_unref", last_unref_exit_cb, factory);
	...
	bonobo_main();
}
    

Since this is a commonly used thing there is a helper to make this easier:

bonobo_running_context_auto_exit_unref (factory) 
    

Details

void        bonobo_context_init             (void);

void        bonobo_context_shutdown         (void);

void        bonobo_context_add              (const CORBA_char *context_name,
                                             Bonobo_Unknown context);

Bonobo_Unknown bonobo_context_get           (const CORBA_char *context_name,
                                             CORBA_Environment *opt_ev);

BonoboObject* bonobo_context_running_get    (void);

void        bonobo_running_context_auto_exit_unref
                                            (BonoboObject *object);