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From Raul Kripalani <ra...@apache.org>
Subject Re: OSGi migration may require a special marshaller
Date Mon, 02 Nov 2015 12:41:47 GMT
Hi Romain,

I'm working on the OSGi compatibility of Ignite. I appreciate your input.

I'm thinking about the situation you describe and I wonder if you're
exporting Ignite as an OSGi service which is then consumed from other
bundles. Under this situation, it would be quite easy to reproduce the
behaviour you describe if Ignite is not resolving classes via the TCCL.
Need to dig deeper into that.

Off the top of my head, there are two alternatives to solve it:

1. Use the TCCL for marshalling/unmarshalling (if not already used) – we
gotta be wary of possible regressions.
2. Create a special OSGi header Ignite-Export-Package so that bundles
containing DTOs can expose packages to Ignite's marshallers.


*Raúl Kripalani*
PMC & Committer @ Apache Ignite, Apache Camel | Integration, Big Data and
Messaging Engineer
http://about.me/raulkripalani | http://www.linkedin.com/in/raulkripalani
http://blog.raulkr.net | twitter: @raulvk

On Mon, Nov 2, 2015 at 9:56 AM, Gilles, Romain <romain.gilles@misys.com>

> Hi all,
> I'm really interested in this issue:
> https://issues.apache.org/jira/browse/IGNITE-1270 . We some stuff to make
> it work in our osgi environment. The main issue for us now is the
> serialization. I think it you will have to rework the OptimizedMarshaller
> or any other marshaller that works with object that come from outside your
> class space.
> We have try kryo that works. Kryo provide an extension point in order to
> resolve the classes:
> https://github.com/EsotericSoftware/kryo/blob/master/src/com/esotericsoftware/kryo/ClassResolver.java
> . With this extension we are able to solve the problem of external classes.
> The only issue with kryo is that some classes need a certain care in the
> serialization process and therefore a specialized serializer.
> So I would like to know from the community what do think of changing the
> way the optimized marshaller works or introducing the support of yet
> another marshaller based on a kryo like technology?
> Thanks in advance,
> Best regards,
> Romain.
> PS: I'm ready to help in the both cases.
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