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From Venkat Sadasivam <>
Subject Re: Groovy and Serialization
Date Thu, 17 Nov 2016 01:07:42 GMT
I solved the issue using cglib proxy class. See my example here.

On Wed, Nov 16, 2016 at 6:35 PM, Jochen Theodorou <> wrote:

> On 16.11.2016 18:30, Venkat Sadasivam wrote:
>> Hi Jochen
>> When using Tomcat server and putting the Groovy object into HttpSession
>> I do not have control over to choose the child classloader for
>> deserialization hence I thought if I could load into the parent then the
>> default web app class loader will be able to find the class and
>> deserialize them.
> It would be interesting to know which class loaders are used for
> deserialization, because only then we know which one we do have to
> "influence". But in general you cannot just load a class into a parent
> class loader. The method to define a class is protected. You could maybe
> add something to the search path of that loader if it is an URLClassLoader.
> Then the problem is the Java script engine. It can load scripts, but what
> classloader is used for doing so and if that results in the actual
> formation of a class depends on the script engine implementation. The
> Groovy script engine will usually spawn its own class loader for that, a
> GroovyClassLoader here. It has to, because it has normally no control over
> the other loaders.
> I find it unlikely that this class loader will be what is used here.
> The context class loader could help maybe if you could set it before
> deserialization. But probably no solution...
> No I think the script engine is not working well for this at all
> bye Jochen

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