Thread: [Orbit-python-list] How to use IDL unions with orbit-python?

[Orbit-python-list] How to use IDL unions with orbit-python?

From: <ml...@kn...> - 2002-01-23 23:25:07

Hi,

I'm new to Orbit-Python (and new to Orbit and new to
Python), so my question may be a frequently asked one.
I have sth. like that:

module M {
  struct S {
    enum E1 { A, B } e;
  };
  union U switch (enum E2 { A, B }) {
    case A: ...;
    case B: ...;
  };
  ...
};

How can I access A and B in client and server code in
both cases?  I tried different variants like M.A and
M.U.A, but didn't succeed.

Thanks in advance!

Re: [Orbit-python-list] How to use IDL unions with orbit-python?

From: Roland M. <99....@ai...> - 2002-01-25 17:02:53

ml (2002-01-24 00:20:45 +0100) :

[Accessing union members]
> How can I access A and B in client and server code in both cases?  I
> tried different variants like M.A and M.U.A, but didn't succeed.

I'm afraid I can't give you a definitive answer since I don't use
unions, but you might consider reading the CORBA Python language
mapping specification.  I seem to remember it explains precisely the
syntax to use in order to access union members.  You can find this
spec on the OMG site, and there's a link to it from the ORBit-Python
homepage, at <URI:http://orbit-python.sault.org/>.

Roland.
-- 
Roland Mas

With the arrest of Dimitry Sklyarov it has become apparent that it is not
safe for non US software engineers to visit the United States. - Alan Cox

Re: [Orbit-python-list] How to use IDL unions with orbit-python?

From: <ml...@kn...> - 2002-01-26 12:20:12

Hallo,

thanks for the quick reply!

On Fri, Jan 25, 2002 at 06:02:48PM +0100, Roland Mas wrote:
> I'm afraid I can't give you a definitive answer since I don't use
> unions, but you might consider reading the CORBA Python language
> mapping specification.  I seem to remember it explains precisely the

I should have written, that I already read the spec, and
also found some examples both for orbit-python and
omniORBpy, but no document showed the use of "embedded"
enum values e.g. in a union:

module M {
  union U switch (enum E { A, B }) {
    case A: ...;
    case B: ...;
  };
};

So it's more a problem with enums than with unions,
because here I have the same problem:

module M {
  struct S {
    enum E { A, B } X;
  };
};

I think I have to put the enum outside of the union
or the struct, but that's not so nice.

Cheers!

[Orbit-python-list] orbit-python and orbit2 anywhere?

From: <ml...@kn...> - 2002-01-28 19:00:06

Hi,

is there a port of orbit-python to orbit2?  AFAIK,
"corbaloc:", "corbaname:" etc. are not supported by
orbit1.

Thanks in advance!

Re: [Orbit-python-list] orbit-python and orbit2 anywhere?

From: Christian R. R. <ki...@as...> - 2002-01-28 19:22:19

On Mon, 28 Jan 2002, ml wrote:

> is there a port of orbit-python to orbit2?  AFAIK,
> "corbaloc:", "corbaname:" etc. are not supported by
> orbit1.

There is, check out gnome CVS, module "orbit-python" IIRC. Am I right,
Johan?

Take care,
--
Christian Reis, Senior Engineer, Async Open Source, Brazil.
http://async.com.br/~kiko/ | [+55 16] 272 3330 | NMFL

Re: [Orbit-python-list] orbit-python and orbit2 anywhere?

From: Johan D. <zil...@ho...> - 2002-01-28 19:58:39

m=E5n 2002-01-28 klockan 20.23 skrev Christian Robottom Reis:
> On Mon, 28 Jan 2002, ml wrote:
>=20
> > is there a port of orbit-python to orbit2?  AFAIK,
> > "corbaloc:", "corbaname:" etc. are not supported by
> > orbit1.
>=20
> There is, check out gnome CVS, module "orbit-python" IIRC. Am I right,
> Johan?
Yepp.

export CVSROOT=3D':pserver:ano...@an...:/cvs/gnome'
cvs login
cvs -z3 co orbit-python

Note. The module has the same name as the one in
orbit-python.sourceforge.net

>=20
> Take care,
> --
> Christian Reis, Senior Engineer, Async Open Source, Brazil.
> http://async.com.br/~kiko/ | [+55 16] 272 3330 | NMFL
>=20

Re: [Orbit-python-list] orbit-python and orbit2 anywhere?

From: <ml...@kn...> - 2002-01-31 20:30:17

On Mon, Jan 28, 2002 at 08:58:26PM +0100, Johan Dahlin wrote:
> mån 2002-01-28 klockan 20.23 skrev Christian Robottom Reis:
> > On Mon, 28 Jan 2002, ml wrote:
> > 
> > > is there a port of orbit-python to orbit2?  AFAIK,
> > > "corbaloc:", "corbaname:" etc. are not supported by
> > > orbit1.

For those who need only "corbaloc:" (that's ok for me at the
moment) without all the other goodies of orbit2: I hacked a
few lines of python code to emulate that behaviour.  I just
split the "corbaloc:" string and call genior (from omniORB3)
using popen with the parameters from the string and read the
generated IOR back to the client program.  

Cheers!

[Orbit-python-list] Do activate_object_with_id and -ORBIPv4Port really work?

From: <ml...@kn...> - 2002-01-29 18:25:06

Hi,

I want to have a CORBA client that does not need to know the
IOR of the server, but without the overhead of a CORBA
naming service.  If the server has a single factory object
with a fixed ID the server uses a fixed client-known TCP
port, the client should reach the service using sth. like:

$ ./client corbaloc::192.168.10.20:7777/Echo

Unfortunately my orbit-python based server doesn't do what I
hoped for:

#!/usr/bin/env python

import random, CORBA
from _GlobalIDL__POA import Echo
import sys

class Echo_Impl(Echo):

    def echoString(self, astring):
        outnum = random.randint(0, 100) / 100.0
        print "[server] %s -> %f" % (astring, outnum)
        return self._this(), outnum

sys.argv.append("-ORBIIOPIPv4=1")
sys.argv.append("-ORBIIOPUSock=0")
sys.argv.append("-ORBIPv4Port=7777")
orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)
servant = Echo_Impl()
poa = orb.resolve_initial_references("RootPOA")
poa.activate_object_with_id("Echo", servant)
print orb.object_to_string(servant._this())
poa.the_POAManager.activate()
orb.run()

If I look at the ior string (using catior, ior-decode, or
ior-decode-2), the TCP port is e.g. 1188, not 7777, and the
object key is no "Echo", but I don't know what.  I believe
that I misunderstood at least two CORBA or orbit-python
concepts, right?  Could someone enlighten me, please?

Thanks in advance!