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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Sorry for the delay – I was taking a couple of days off last
week and I didn’t get a chance to respond before disappearing.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The problem here is that you’re trying to return the objects
from the remote domain into the local domain. ObjectOperations actually has a
set of overloads which take ObjectHandles and has some other methods which
return ObjectHandles for working with objects in a remote app domain. If I
change your modified code to the code below and add a using
System.Runtime.Remoting this works again:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> var subClass =
scope.GetVariableHandle("C"); //
get back a handle<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> var instance = ops.Invoke(subClass, new
ObjectHandle[0]); // invoke the handle to create an instance<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> mbr = instance.Unwrap() as MbrBase; //
now we know we have an MBR and we can unwrap it to our local side<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
users-bounces@lists.ironpython.com [mailto:users-bounces@lists.ironpython.com] <b>On
Behalf Of </b>mohammad mustaq<br>
<b>Sent:</b> Saturday, April 10, 2010 6:51 AM<br>
<b>To:</b> Discussion of IronPython<br>
<b>Subject:</b> Re: [IronPython] IronPython.Runtime.Types.PythonType Is not
marked as Serializable Exception<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi Dino,<o:p></o:p></p>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Is there any update on this. Should you need more details
let me know.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>thanks,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>Mustaq<o:p></o:p></p>
<div>
<p class=MsoNormal>On Wed, Apr 7, 2010 at 10:40 AM, mohammad mustaq <<a
href="mailto:mustaq2001@gmail.com">mustaq2001@gmail.com</a>> wrote:<o:p></o:p></p>
<p class=MsoNormal>Hi Dino,<br>
<br>
If have tweaked your code to reproduce the exception that I am facing. Let me
know if you need more details.<br>
<br>
thanks,<br>
Mustaq<o:p></o:p></p>
<div>
<p class=MsoNormal><br>
<br>
using System;<br>
using Microsoft.Scripting;<br>
using IronPython.Hosting;<o:p></o:p></p>
</div>
<p class=MsoNormal>using Microsoft.Scripting.Hosting;<o:p></o:p></p>
<div>
<p class=MsoNormal><br>
<br>
class Foo<br>
{<br>
public static void Main(string[] args)<br>
{<br>
AppDomain ad =
AppDomain.CreateDomain("foo");<br>
var engine =
Python.CreateEngine(ad);<br>
engine.Runtime.LoadAssembly(<o:p></o:p></p>
</div>
<div>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>typeof(MbrBase).Assembly);<br>
<br>
var code =
engine.CreateScriptSourceFromString(@"<br>
import MbrBase<br>
class C(MbrBase):<br>
pass<br>
<br>
a = C()<br>
", SourceCodeKind.Statements);<br>
<br>
var scope = engine.CreateScope();<br>
code.Execute(scope);<br>
<br>
Console.WriteLine("Trying to do
it... {0}", <a href="http://appdomain.currentdomain.id/" target="_blank">AppDomain.CurrentDomain.Id</a>);<br>
MbrBase mbr = (MbrBase)scope.GetVariable("a");<o:p></o:p></p>
</div>
<p class=MsoNormal>// MY CHANGES<br>
<br>
string isSubClassCode =
String.Format("issubclass({0},{1})", "C",
"MbrBase");<br>
ScriptSource script =
engine.CreateScriptSourceFromString(isSubClassCode, SourceCodeKind.Expression);<br>
bool result =
(bool)script.Execute(scope);<br>
<br>
if (result == true)<br>
{<br>
ObjectOperations ops = engine.Operations;<br>
<br>
object
subClass = scope.GetVariable("C");<br>
object
instance = ops.Call(subClass);<br>
<br>
mbr =
instance as MbrBase; <br>
}<br>
<br>
// END OF MY CHANGE<br>
<br>
mbr.DoItVirtually();<br>
mbr.DoIt();<br>
Console.ReadKey();<o:p></o:p></p>
<div>
<p class=MsoNormal><br>
}<br>
}<br>
<br>
public class MbrBase : MarshalByRefObject<br>
{<br>
public virtual void DoItVirtually()<br>
{<br>
Console.WriteLine("Did it
virtually {0}", <a href="http://appdomain.currentdomain.id/"
target="_blank">AppDomain.CurrentDomain.Id</a>);<br>
}<br>
<br>
public void DoIt()<br>
{<br>
Console.WriteLine("Did it
{0}", <a href="http://appdomain.currentdomain.id/" target="_blank">AppDomain.CurrentDomain.Id</a>);<br>
}<br>
}<o:p></o:p></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p>
<div>
<div>
<div>
<p class=MsoNormal>On Tue, Mar 30, 2010 at 10:12 PM, Dino Viehland <<a
href="mailto:dinov@microsoft.com" target="_blank">dinov@microsoft.com</a>>
wrote:<o:p></o:p></p>
</div>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;
margin-left:4.8pt;margin-right:0in'>
<div>
<div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>This works for me w/ 2.6. I’ve
included my simple repro below which creates a new script engine in a remote
app domain, loads my assembly in, runs some code which subclasses the MBRO base
class, instantiates an instance of this class, and then calls it from a remote
app domain. The key thing here is that when an MBRO is involved a
PythonType should not need to be serialized – the type should live in the
remote app domain and all execution of that code should also happen in the
remote app domain where we have access to the local PythonType object. Are
you also subclassing types which don’t derive from MBRO? It might help to
run IronPython w/ -X:ExceptionDetail if the exception is propagating through
IronPython – that’ll give a better stack trace to understand what’s going
on. Or if you can tweak the simple repro below to match the behavior
you’re seeing that’d be helpful as well.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>using System;</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>using Microsoft.Scripting;</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>using IronPython.Hosting;</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>class Foo {</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> public static void
Main(string[] args) { </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
AppDomain ad = AppDomain.CreateDomain("foo");</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
var engine = Python.CreateEngine(ad);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
engine.Runtime.LoadAssembly(typeof(MbrBase).Assembly);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
var code = engine.CreateScriptSourceFromString(@"</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>import MbrBase</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>class C(MbrBase):</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> pass</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>a = C()</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>", SourceCodeKind.Statements);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
var scope = engine.CreateScope();</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
code.Execute(scope);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
Console.WriteLine("Trying to do it... {0}", <a
href="http://AppDomain.CurrentDomain.Id" target="_blank">AppDomain.CurrentDomain.Id</a>);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
MbrBase mbr = (MbrBase)scope.GetVariable("a");</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
mbr.DoItVirtually();</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
mbr.DoIt();</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> }</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>}</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>public class MbrBase :
MarshalByRefObject {</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> public virtual void
DoItVirtually() {</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
Console.WriteLine("Did it virtually {0}", <a
href="http://AppDomain.CurrentDomain.Id" target="_blank">AppDomain.CurrentDomain.Id</a>);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> }</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> public void DoIt() {</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>
Console.WriteLine("Did it {0}", <a
href="http://AppDomain.CurrentDomain.Id" target="_blank">AppDomain.CurrentDomain.Id</a>);</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> }</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>}</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<div style='border:none;border-left:solid windowtext 1.5pt;padding:0in 0in 0in 4.0pt;
border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color blue'>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt'>From:</span></b><span style='font-size:10.0pt'> <a
href="mailto:users-bounces@lists.ironpython.com" target="_blank">users-bounces@lists.ironpython.com</a>
[mailto:<a href="mailto:users-bounces@lists.ironpython.com" target="_blank">users-bounces@lists.ironpython.com</a>]
<b>On Behalf Of </b>mohammad mustaq<br>
<b>Sent:</b> Monday, March 29, 2010 8:13 PM<br>
<b>To:</b> <a href="mailto:users@lists.ironpython.com" target="_blank">users@lists.ironpython.com</a><br>
<b>Subject:</b> [IronPython] IronPython.Runtime.Types.PythonType Is not marked
as Serializable Exception</span><o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi,<br>
<br>
I have IronPython embedded in my C# application. I face issues while creating
the python engine in a different appdomain.<br>
<br>
It is imposed that every class in IronPython inherit the .NET base class say
ClassA. ClassA is derived from MarshalByRefObj as I need to pass an instance of
this class to a new appdomain.<br>
I create a new appdomain and pass the instance of ClassA to this Appdomain.
While calling a method in python class through the instance of ClassA I get an
exception mentioning that "Type 'IronPython.Runtime.Types.PythonTyp <o:p></o:p></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>e'
in Assembly 'IronPython, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35' is not marked as serializable". <br>
<br>
How do I Serialize this PythonType. One way that i know is to modify the
IronPython source and mark the required types as Serializable (but i do not
know where it will lead to and its consequences). Could you please suggest a
way to perform the required operation. Should you need more details let me
know.<br>
<br>
thanks,<br>
<span style='color:#888888'>Mustaq<br>
</span><br>
P.S. I have used both IronPython 2.0 and 2.6.<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>
Users mailing list<br>
<a href="mailto:Users@lists.ironpython.com" target="_blank">Users@lists.ironpython.com</a><br>
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target="_blank">http://lists.ironpython.com/listinfo.cgi/users-ironpython.com</a><o:p></o:p></p>
</blockquote>
</div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
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