[Ironpython-users] .NET Remoting and Interface based objects

Muyal,Tsahi Tsahi.Muyal at kla-tencor.com
Tue Oct 11 23:38:51 CEST 2011

I tried using typedproxy class

Not sure I am using it the right way


This is what I did


test = typedproxy(TransparentProxy, IServerInterface)




This call is failing with "Expected IServerInterface, got


I debugged the code to find out where it is failing, it is in typedproxy
(I marked the line)


class typedproxy(object):

    __slots__ = ['obj', 'proxyType']

    def __init__(self, obj, proxyType):

        self.proxyType = proxyType

        self.obj = obj

    def __getattribute__(self, attr):

        proxyType = object.__getattribute__(self, 'proxyType')

        obj = object.__getattribute__(self, 'obj')

        att = getattr(proxyType, attr)

        att2 = att.__get__(obj, proxyType) #This line is throwing the

        return att2


Any idea?


Thank you very much;

Tsahi Muyal


From: Dino Viehland [mailto:dinov at microsoft.com] 
Sent: Tuesday, October 11, 2011 10:58 PM
To: Muyal,Tsahi; ironpython-users at python.org
Subject: RE: .NET Remoting and Interface based objects


I'm not quite certain this is the same issue but you should try using
the wrapper from this thread:




The transparent proxies always succeed when casting them to an interface
type so it's hard for us to work w/ the objects when we need to check
for certain interfaces ourselves.


From: ironpython-users-bounces+dinov=microsoft.com at python.org
[mailto:ironpython-users-bounces+dinov=microsoft.com at python.org] On
Behalf Of Muyal,Tsahi
Sent: Tuesday, October 11, 2011 9:13 AM
To: ironpython-users at python.org
Subject: [Ironpython-users] .NET Remoting and Interface based objects



I am trying to call our .NET service via remoting using IronPython

I have the transparent proxy object but I don't know how to cast it to
the interfaces (that are implemented by the server side object) 


I tried IServerInterface.SomeMethod(transparent-proxy-object) but it is
failing with "expected IServerInterface, got MarshalByRefObject"


How can I cast it to an interface?


I am using 2.7


Thanks in advance,

Tsahi Muyal


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