[rules-users] Resuming Flow: NPE when completing a work item

[Mauricio Salatino]

Can you provide us a simple project with a test case?
It's easy to me to debug and find the problem. And looks like you already
point out where is the problem (the work items mapping parameters).
With a simple maven project that show that situation we can create a jira
issue if we think that it's a bug. That it's possible because the
resolveClass methods was introduced after the rest of the class.
I can work on solve that problem tonight after finishing my current
assignments, but with out a simple test case that shows that it fails. It's
impossible for me to start with it.


On Wed, Apr 14, 2010 at 9:59 AM, nanic23 <nanic23 at hotmail.com> wrote:

>
> Hi Mauricio,
>
> Thank you very much for you comments. I am mapping a single variable type
> Long.
>
> Could you please look at posts above as I think they might have a good
> point. There it seems that the getWorkItem method is creating a
> MarshallerReaderContext with a "null" value for the ruleBase argument:
>
> public WorkItem getWorkItem() {
>        if ( workItem == null ) {
>            try {
>                ByteArrayInputStream bais = new ByteArrayInputStream(
> workItemByteArray );
>                MarshallerReaderContext context = new
> MarshallerReaderContext( bais,
>
>
> null,  // THIS IS a RULEBASE <<<<<<<<<<<<<
>
>
> null,
>
> null );
>                workItem = InputMarshaller.readWorkItem( context );
>
>
> This in turn ends up creating a NPE when the "null" ruleBase is used.
>
>  protected Class< ? > resolveClass(ObjectStreamClass desc) throws
> IOException, ClassNotFoundException {
>        String name = desc.getName();
>        try {
>
>            return Class.forName(name, false,
> this.ruleBase.getRootClassLoader()); // HERE IS WHERE THE NULL POINTER
> EXCEPTION OCCURS <<<<<<<<<<<<<<<<<<<<<<< since the RuleBase is NULL
>
>        } catch (ClassNotFoundException ex) {
>            return super.resolveClass( desc );
>        }
>    }
>
> This is explained in more detail in the posts above. Do you think this
> could
> be the issue? Am I following (and understanding) Drools src code correctly?
>
> I appreciate your help!
>
> Thanks,
>
> Nick.
> --
> View this message in context:
> http://n3.nabble.com/Resuming-Flow-NPE-when-completing-a-work-item-tp716847p718601.html
> Sent from the Drools - User mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>



-- 
- http://salaboy.wordpress.com
- http://www.jbug.com.ar
- Salatino "Salaboy" Mauricio -
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20100414/74aa34b8/attachment.html