[rules-users] Drools and Guvnor 5.1M2 - Exception being thrownin processChangeSet

[Esteban Aliverti]

The problem seams to happen because the kagent can't access the url.
If you try to access the change set xml using a browser, does the browser
ask you for authentication? I don't know why, but guvnor protect its urls
since 5.1 I think.
So, basically, the error is that guvnor can't read from the url. The same
error happens if you provide a non existent url. I need to open a jira for
this.
As a work around, try doing this:

 <change-set xmlns='http://drools.org/drools-5.0/change-set'

    xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'

    xs:schemaLocation='http://drools.org/drools-5.0/change-set
drools-change-set-5.0.xsd<http://drools.org/drools-5.0/change-setdrools-change-set-5.0.xsd>'
>

    <add>

         <resource basicAuthentication='enabled' username='admin'
password='admin' source='
http://ruleserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rule.package/LATEST'
type='PKG' />

    </add>

</change-set>


Remember to replace username and password.

Best,

2010/6/30 Jeffrey Schneller <jeffrey.schneller at envisa.com>

>  Here is the xml file I am getting:
>
>
>
> <change-set xmlns='http://drools.org/drools-5.0/change-set'
>
>     xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'
>
>     xs:schemaLocation='http://drools.org/drools-5.0/change-set
> drools-change-set-5.0.xsd<http://drools.org/drools-5.0/change-setdrools-change-set-5.0.xsd>'
> >
>
>     <add>
>
>          <resource source='
> http://ruleserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rule.package/LATEST'
> type='PKG' />
>
>     </add>
>
> </change-set>
>
>
>
>
>
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Esteban Aliverti
> *Sent:* Wednesday, June 30, 2010 3:18 PM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Drools and Guvnor 5.1M2 - Exception being
> thrownin processChangeSet
>
>
>
> Could you please post the xml file you are getting from
> http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rule.package/LATEST/ChangeSet.xml
> ?
>
>
>
> Best,
>
> 2010/6/30 Jeffrey Schneller <jeffrey.schneller at envisa.com>
>
> I am trying to upgrade to the 5.1M2 build from 5.0.1 and am running into
> some issues.  I have installed the new 5.1 Guvnor and imported the rules
> from my 5.0.1 Guvnor instance.
>
> I then removed the old 5.0.1 drools jars from my app and replaced them with
> the 5.1M2 drools jars.  I was also added all the dependent libraries.  The
> code that worked with the 5.0.1 version does not work with the 5.1M2
> version.  In 5.0.1 I was constructing the xml and streaming it into the
> applyChangeSet method.  With 5.1M2 I am just pointing to the change set xml
> file that is in the Guvnor.
>
>
>
> I am seeing a NullPointerException being thrown  in the processChangeSet
> method as shown below.
>
>
>
> Caused by: java.lang.NullPointerException
>
>                 at
> org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgentImpl.java:171)
>
>                 at
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:143)
>
>                 at
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:130)
>
>
>
>
>
> Did I miss something?  Am I doing something wrong?  Below is the code that
> I have.
>
>
>
>                  KnowledgeAgentConfiguration kaconf =
> KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
>
>                  kaconf.setProperty( "drools.agent.scanDirectories", "true"
> );
>
>                  kaconf.setProperty("drools.agent.newInstance", "false");
>
>
>
>                  ResourceFactory.getResourceChangeScannerService().start();
>
>
>  ResourceFactory.getResourceChangeNotifierService().start();
>
>
>
>                 String url = "
> http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rule.package/LATEST/ChangeSet.xml
> ";
>
>
>
>                 KnowledgeAgent kagent =
> KnowledgeAgentFactory.newKnowledgeAgent( "Configuration", kaconf );
>
>                 kagent.setSystemEventListener(new MyDroolsListener());
>
> try {
>
>
> kagent.applyChangeSet(ResourceFactory.newUrlResource(new URL(url)));
> // ERROR IS OCCURING INSIDE OF applyChangeSet
>
>                 } catch (MalformedURLException e) {
>
>                                 e.printStackTrace();
>
>                 }
>
>
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>
>
>
>
> --
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
>
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>
>


-- 
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
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