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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact --
# This file is part of logilab-common.
# logilab-common is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option) any
# later version.
# logilab-common is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
# You should have received a copy of the GNU Lesser General Public License along
# with logilab-common. If not, see <>.
"""A set of utility function to ease the use of OmniORBpy.
__docformat__ = "restructuredtext en"
from omniORB import CORBA, PortableServer
import CosNaming
orb = None
def get_orb():
returns a reference to the ORB.
The first call to the method initialized the ORB
This method is mainly used internally in the module.
global orb
if orb is None:
import sys
orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)
return orb
def get_root_context():
returns a reference to the NameService object.
This method is mainly used internally in the module.
orb = get_orb()
nss = orb.resolve_initial_references("NameService")
rootContext = nss._narrow(CosNaming.NamingContext)
assert rootContext is not None, "Failed to narrow root naming context"
return rootContext
def register_object_name(object, namepath):
Registers a object in the NamingService.
The name path is a list of 2-uples (id,kind) giving the path.
For instance if the path of an object is [('foo',''),('bar','')],
it is possible to get a reference to the object using the URL
is mapped to
The get_object_reference() function can be used to resolve such a URL.
context = get_root_context()
for id, kind in namepath[:-1]:
name = [CosNaming.NameComponent(id, kind)]
context = context.bind_new_context(name)
except CosNaming.NamingContext.AlreadyBound as ex:
context = context.resolve(name)._narrow(CosNaming.NamingContext)
assert context is not None, \
'test context exists but is not a NamingContext'
id, kind = namepath[-1]
name = [CosNaming.NameComponent(id, kind)]
context.bind(name, object._this())
except CosNaming.NamingContext.AlreadyBound as ex:
context.rebind(name, object._this())
def activate_POA():
This methods activates the Portable Object Adapter.
You need to call it to enable the reception of messages in your code,
on both the client and the server.
orb = get_orb()
poa = orb.resolve_initial_references('RootPOA')
poaManager = poa._get_the_POAManager()
def run_orb():
Enters the ORB mainloop on the server.
You should not call this method on the client.
def get_object_reference(url):
Resolves a corbaname URL to an object proxy.
See register_object_name() for examples URLs
return get_orb().string_to_object(url)
def get_object_string(host, namepath):
"""given an host name and a name path as described in register_object_name,
return a corba string identifier
strname = '/'.join(['.'.join(path_elt) for path_elt in namepath])
return 'corbaname::%s#%s' % (host, strname)