[jboss-jira] [JBoss JIRA] Updated: (JBCACHE-474) Compatibility fwk for all classes passed on the wire

[Manik Surtani (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBCACHE-474?page=all ]

Manik Surtani updated JBCACHE-474:
----------------------------------

    Fix Version/s: 2.1.0
                       (was: 2.0.0)

> Compatibility fwk for all classes passed on the wire
> ----------------------------------------------------
>
>                 Key: JBCACHE-474
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-474
>             Project: JBoss Cache
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 1.2.4SP1
>            Reporter: Manik Surtani
>         Assigned To: Manik Surtani
>             Fix For: 2.1.0
>
>
> Classes that are serialized:
> Fqn
> MethodCall (JG?)
> *Exception
> GlobalTransaction
> State transfers
> 1) Lets use JGroups Streamable where possible (dependency?  Externalizable instead?)
> 2) Provide a header short containing version
> 3) Use a MarshallingFactory for each version so we can understand messages from older installations
> 4) Provide MarshallingFactories as plugins so old versions can talk to newer versions (fwd compat)
> Object unmarshal(short version, Class type, InputStream is)
> {
> 	// if plugin directory empty or unset || version == currentVersion, revert back to existing mechanism
> 	// else
> 	// Look up UnmarshallerPlugin in the compat table (populated at startup with the contents of the plugin dir)
> 	// Lookup based on version and class type.  Unmarshaller then extracts and regenerates the relevant object.
> }
> Unit test as well.
> Standalone fwk?  jboss-compat.jar + plugins.

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