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.
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:
var subClass = scope.GetVariableHandle("C");
// get back a handle
var instance = ops.Invoke(subClass, new ObjectHandle[0]);
// invoke the handle to create an instance
mbr = instance.Unwrap() as MbrBase;
// now we know we have an MBR and we can unwrap it to our
local side
From: [email protected]
[mailto:[email protected]] On Behalf Of mohammad mustaq
Sent: Saturday, April 10, 2010 6:51 AM
To: Discussion of IronPython
Subject: Re: [IronPython] IronPython.Runtime.Types.PythonType Is not marked as
Serializable Exception
Hi Dino,
Is there any update on this. Should you need more details let me know.
thanks,
Mustaq
On Wed, Apr 7, 2010 at 10:40 AM, mohammad mustaq
<[email protected]<mailto:[email protected]>> wrote:
Hi Dino,
If have tweaked your code to reproduce the exception that I am facing. Let me
know if you need more details.
thanks,
Mustaq
using System;
using Microsoft.Scripting;
using IronPython.Hosting;
using Microsoft.Scripting.Hosting;
class Foo
{
public static void Main(string[] args)
{
AppDomain ad = AppDomain.CreateDomain("foo");
var engine = Python.CreateEngine(ad);
engine.Runtime.LoadAssembly(
typeof(MbrBase).Assembly);
var code = engine.CreateScriptSourceFromString(@"
import MbrBase
class C(MbrBase):
pass
a = C()
", SourceCodeKind.Statements);
var scope = engine.CreateScope();
code.Execute(scope);
Console.WriteLine("Trying to do it... {0}",
AppDomain.CurrentDomain.Id<http://appdomain.currentdomain.id/>);
MbrBase mbr = (MbrBase)scope.GetVariable("a");
// MY CHANGES
string isSubClassCode = String.Format("issubclass({0},{1})", "C",
"MbrBase");
ScriptSource script =
engine.CreateScriptSourceFromString(isSubClassCode, SourceCodeKind.Expression);
bool result = (bool)script.Execute(scope);
if (result == true)
{
ObjectOperations ops = engine.Operations;
object subClass = scope.GetVariable("C");
object instance = ops.Call(subClass);
mbr = instance as MbrBase;
}
// END OF MY CHANGE
mbr.DoItVirtually();
mbr.DoIt();
Console.ReadKey();
}
}
public class MbrBase : MarshalByRefObject
{
public virtual void DoItVirtually()
{
Console.WriteLine("Did it virtually {0}",
AppDomain.CurrentDomain.Id<http://appdomain.currentdomain.id/>);
}
public void DoIt()
{
Console.WriteLine("Did it {0}",
AppDomain.CurrentDomain.Id<http://appdomain.currentdomain.id/>);
}
}
On Tue, Mar 30, 2010 at 10:12 PM, Dino Viehland
<[email protected]<mailto:[email protected]>> wrote:
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.
using System;
using Microsoft.Scripting;
using IronPython.Hosting;
class Foo {
public static void Main(string[] args) {
AppDomain ad = AppDomain.CreateDomain("foo");
var engine = Python.CreateEngine(ad);
engine.Runtime.LoadAssembly(typeof(MbrBase).Assembly);
var code = engine.CreateScriptSourceFromString(@"
import MbrBase
class C(MbrBase):
pass
a = C()
", SourceCodeKind.Statements);
var scope = engine.CreateScope();
code.Execute(scope);
Console.WriteLine("Trying to do it... {0}",
AppDomain.CurrentDomain.Id<http://AppDomain.CurrentDomain.Id>);
MbrBase mbr = (MbrBase)scope.GetVariable("a");
mbr.DoItVirtually();
mbr.DoIt();
}
}
public class MbrBase : MarshalByRefObject {
public virtual void DoItVirtually() {
Console.WriteLine("Did it virtually {0}",
AppDomain.CurrentDomain.Id<http://AppDomain.CurrentDomain.Id>);
}
public void DoIt() {
Console.WriteLine("Did it {0}",
AppDomain.CurrentDomain.Id<http://AppDomain.CurrentDomain.Id>);
}
}
From:
[email protected]<mailto:[email protected]>
[mailto:[email protected]<mailto:[email protected]>]
On Behalf Of mohammad mustaq
Sent: Monday, March 29, 2010 8:13 PM
To: [email protected]<mailto:[email protected]>
Subject: [IronPython] IronPython.Runtime.Types.PythonType Is not marked as
Serializable Exception
Hi,
I have IronPython embedded in my C# application. I face issues while creating
the python engine in a different appdomain.
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.
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
e' in Assembly 'IronPython, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35' is not marked as serializable".
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.
thanks,
Mustaq
P.S. I have used both IronPython 2.0 and 2.6.
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